BG63885B1 - Coating of the inner surface of a pipeline, method for its application on the pipeline inner surface, two-layer preparation of the coating and method for its preparation - Google Patents

Abstract

The coating includes two coaxially fitted tubular thin-layer sheathings (2, 3) based on a thermoplastic polymer material, the outer sheathing (2) fitted to the inner surface of pipeline (1), and inner sheathing (3) is separated from it by means of a coaxial reiforcement layer (4) impegnated by a hardening polymer binder. The outer sheathing (3) is formed by a multicomponent homogenous system including at a least one polymer selected from the group of thermoplastic polymers which have relative elongation not less than 200%, melting temperature no less than 100oC and a structural modifier of the selected polymer. In addition, at least in one place sheathing (3) and layer (4) are interrupted longitudinally along the direction of the axis of the coating. Their interrupted ends (6, 7) are airtightly interconnected and sheathing (3) together with layer (4) form an integral structure. The two-layer preparation contains the outer sheathing (3) connected to the reinforcement layer (4), and sheathing (3) is produced from the multicomponent homogenous system listed as a composition. 62 claims, 11 figures

Description

(54) PIPE INTERNAL SURFACE, METHOD OF APPLICATION ON THE INTERNAL PIPE SURFACE AND TWO MULTIPLE BOOKING

TECHNICAL FIELD

The invention relates to the field of construction, and in particular to the protection of the inner surface of the pipeline from mechanical damage, corrosion or from the formation of unwanted deposits, and in particular to the coating of the inner surface of the pipeline, method for its application, two-layer preparation of such coating and method for producing this two-layer blank.

BACKGROUND OF THE INVENTION

A coating is known on the inner surface of a pipeline, which is a three-layer structure comprising two coaxially arranged tubular thin-layer sheaths of thermoplastic material, between which is a reinforcing layer impregnated with a curable binder [1].

There is a method of applying the known coating to the inner surface of the pipeline, which consists in the fact that outside the pipeline coaxially tubular thin-layer sheaths of thermoplastic polymer material are placed, one of which - the outer one, is intended to fit into the inner surface of the pipe, the other, the inner, which acts as a blower, is separated from the outer by a reinforcing layer, which is soaked with a heat-curable binder and a three-layer blank is obtained. This workpiece is then introduced into the interior of the pipeline and pressurized to a pressurized coolant in the cavity of the inner casing until the binder is fully cured. The inner sheath is made of a thin-film polymer material that has an outer, facing to the reinforcing layer, surface, fibers - polyester or glass joined by calendering.

When affixed to such an inner sheath of the coaxial arraying layer, as well as in the process of transporting the described blank preparation in the pipeline, partial adhesion of the inner sheet to the reinforcing layer is possible, which leads to the formation of folds, distortion of the inner thin film sheath and others, which causes a deterioration in the quality of the coating.

Also known is a coating of the inner surface of a pipeline comprising two coaxially arranged tubular thin-layer sheaths based on thermoplastic polymeric material, one of which is adjacent to the inner surface of the pipeline and the other to the inner is separated by outer ones. , impregnated with a curable polymer binder. [2]

In this coating, the inner thin-layer sheath is bonded to the reinforcement layer only by adhesion between the sheath and the curing binder with which this reinforcement layer is impregnated. This does not provide an effective bonding of the inner thin-layer sheath to the entire surface of the reinforcement layer and the monolithicity of the coating of the inner surface of the pipeline as a whole and leads to partial separation of the sheet and, as a result, to deterioration of the coating properties.

A method of obtaining a coating is known, which is to coax the tubular thin-layer sheaths on the basis of thermoplastic polymeric material, one of which is external to the inner surface of the pipeline and the other to the inner, is separated from the outer by a reinforcing layer, the latter is penetrated with a thermally curable polymeric binder and a three-layer blank is obtained, which is introduced into the pipeline, fed into the cavity of the inner sheath a hot heat transfer medium - pressure steam - and the polymeric binder hardens.

During transportation of the described workpiece inside the pipeline from one end to the other, due to the free adherence of the inner thin layer to the reinforcing layer, deformations, distortions and formation of defective sections in this shell are possible, which complicates the technological process of application of the coating and to a decrease in the quality of the latter, resulting in the formation of crushes, folds on the surface of the coating and the like, resulting in changes in the turbulent flow of the transported medium, increase of energy for transportation and decrease of the shelf life of the coating.

A coating is known in which, for effective adhesion of the inner thin film coating to the curable binder and the reinforcing layer, a two-layer blank is used consisting of an inner tube thin film bonded to the reinforcing layer. [3]

Such a workpiece is obtained by melting a layer of polyurethane on a synthetic felt web, from which a tubular structure is then made. The bonding of the polymer layer to the synthetic felt web is done only at the expense of the mechanical bonding, which does not always provide sufficient strength for such bonding, which makes it possible to separate the inner layer of the thin layer sheath from the reinforcing layer, as in the process of bonding. designing the pipeline coating and its operation, and in general, to reducing the quality of the pipeline.

SUMMARY OF THE INVENTION

The present invention is based on the task of creating a coating on the inner surface of the pipeline, the inner shell of which has a composition such as to significantly increase the quality of the coating, for the development of a method for applying this coating to the inner surface of the pipeline , in which said coating is applied in such a way as to exclude the turbulent change in flow transported through the pipeline ^ to reduce the energy consumption for transporting the flow and to increase suitability of the coating, to create a two-layer preform of this coating and to develop a method of preparing a workpiece in which it has a high adhesion strength of the connection of the inner film coat and basecoat layer.

The problem is solved by coating the inner surface of a pipeline, comprising two coaxially arranged tubular thin-layer sheaths based on thermoplastic polymeric material, one of which - the outer one - fits into the inner surface of the pipeline and the other - the inner one - is separated from the outer one by the outer one. a layer impregnated with a curable polymeric substance, according to the invention, the inner tubular thin-layer sheath is formed by a multicomponent homogeneous system comprising at least one polymer selected from of the group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C, and a structural modifier of the selected polymer, wherein the inner tubular thin film together with the main reinforcing layer are made in at least one location, broken longitudinally along the axis of the coating, their broken ends being hermetically interconnected, and this shell forms a monolithic structure with the main reinforcing layer.

If used in the multicomponent homogeneous system forming the inner thin-film sheath, a thermoplastic polymer with a relative elongation of less than 200%, the inner sheath will be sufficiently rigid to impede the coating process described below. In the case of using a thermoplastic polymer with a melting point lower than 100 ° C, there is a risk that the inner thin film will be leak-proof when hot steam, such as saturated steam, is fed into its cavity.

The group of plastic polymers having a relative elongation _; not less than 200% and a melting point of not less than 100 ° C may contain low density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer, represents polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

Due to the high thermal stability and the small intermolecular interaction, the polyorganosiloxanes do not form large agglomerates in the thermoplastic polymer and are evenly distributed in the free volume, increasing the mobility of the nostructural elements of the thermoplastic polymer _? contributing to the denser and more orderly packaging of the macro chains. Such changes to the structure of the thermoplastic polymer lead to an increase in its resistance to abrasion and to an increase in adhesion with other materials, in particular with synthetic reinforcing material.

The inner tube thin-layer sheath may be formed as a multicomponent homogeneous system comprising one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in an amount of 99.3-

99.7% by weight relative to the weight of the inner shell, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner shell.

When a multicomponent homogeneous system contains one or a mixture of two thermoplastic polymers in an amount of ₁ less than 99.3% by weight and a polyorganosiloxane in an amount in excess of 0.7%, the physicomechanical properties of the thermoplastic polymer or a mixture of two thermoplastic polymers deteriorate. When the content of the thermoplastic polymer or the mixture of two thermoplastic polymers is in an amount greater than 99.7% by weight and the polyorganosiloxane is in an amount less than 0.3% by weight, no effect of modification of the structure is observed manifested in improving the properties of the thermoplastic polymer.

As the selected thermoplastic polymer, it is appropriate to use low density polyethylene and as polyorganosiloxane polymethylsiloxane.

Extra-high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane may be used as the selected thermoplastic polymer.

Polypropylene may also be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride and poly-organosiloxane-polyethylphenylsiloxane may be used as the selected thermoplastic polymer.

Thermoplastic polyurethane may be used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% With respect to the weight of the inner shell can be used, and use polyphenylsiloxane as polyorganosiloxane.

This ratio of components allows to obtain a multicomponent homogeneous system with properties different from the properties of thermoplastic polymers included in its composition, which system has increased strength while maintaining sufficient elasticity. When incorporated into the mixture of low density polyethylene of less than 5% by weight and more of polypropylene

94.7% by weight, the multicomponent homogeneous system has the properties of modified polypropylene, and when incorporated into the mixture of low density polyethylene in an amount of .gk - greater than 95% by weight, and of polypropylene in the amount of less than 4.3. wt.%, the multicomponent homogeneous system has the properties of modified polyethylene.

It is advisable to use, as a mixture of two selected thermoplastic polymers, a mixture of ultra-high molecular weight polyethylene in an amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7 wt. % by weight of inner liner and polymethylsiloxane as polyorganosiloxane.

This ratio of components allows to obtain a multicomponent homogeneous system with properties different from the properties of thermoplastic polymers included in its composition - increased chemical resistance combined with high strength and sufficient elasticity. When the system contains ultra-high molecular weight polyethylene in an amount of less than 5% by weight and a copolymer of propylene with vinyl acetate in an amount greater than 94.7%, this system has the properties of a modified copolymer of propylene with vinyl acetate; when the system contains ultra-high molecular weight polyethylene in an amount _; greater than 95% by weight and a copolymer of propylene with vinyl acetate in an amount of less than 4.3% by weight, this system has the properties of modified ultra-high molecular weight polyethylene.

As a mixture of two selected thermoplastic polymers, it is desirable to use a mixture of polyvinyl chloride in an amount of 5-95 wt.% And thermoplastic polyurethane in an amount of 4.3-94.7 wt.% By weight of the inner shell, and as polyorganosiloxane uses polymethylphenylsiloxane or polyethylphenylsiloxane.

The specified ratio of components allows to obtain a multicomponent system with properties other than thermoplastic polymers included in its composition - high abrasion resistance combined with increased adhesion to other materials, especially to synthetic reinforcing material, and with sufficient plasticity . When the system contains thermoplastic polyurethane _; less than 5% by weight and more than 94.7% by weight of polyvinyl chloride, it exhibits modified polyvinyl chloride properties, and when thermoplastic polyurethane content is greater than 95% and polyvinyl chloride content is less than 4.3 wt.% - Properties of modified thermoplastic polyurethane.

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The coating may comprise at least one additional reinforcing layer coaxially arranged between the outer tubular thin film sheath and the main reinforcing layer.

It is advantageous for the main reinforcement layer to be made of synthetic non-woven fibrous material.

The broken ends of the inner tubular thin film, together with the main reinforcing layer, can be hermetically sealed by contact or by overlapping.

The task is solved in that in the method for applying said coating on the inner surface of the pipeline, consisting in the fact that outside the pipe coaxially placed tubular thin-film coatings based on thermoplastic polymer material, one of which - the _external} is intended to adhere to the inner surface of the pipeline and the other to the inner surface, it is separated from it by a basic reinforcing layer, the latter is penetrated with a thermally curable polymer binder and a three-layer preform of the coating is obtained, k The float is introduced into the interior of the pipeline and then pressurized coolant into the cavity of the inner casing with subsequent heat treatment and curing of the binder. According to the invention, the main reinforcing layer is bonded to the inner thin layer by connecting the surface layers to the base surfaces. and the inner thin-layer sheath formed by a thin-layer web obtained from a multicomponent homogeneous system by mixing at melt at least one polymer selected from the group thermoplastic polymers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C and a structural modifier of the selected polymer, and by subsequently sealing the side edges of the thin-film web together, together with the associated main reinforcing layer, receiving a two-layer blank of the coating from coaxially arranged and interconnected reinforcing layer and inner tube thin layer, and the already obtained two-layer blank is coaxially applied to the outer tube thin film sheath.

The group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of at least 100 ° C may comprise low density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is a polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath may be obtained from a multicomponent homogeneous system by mixing upon melting one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers and an amount of 99.3-99.7% by weight relative to the total weight of the inner liner, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner liner.

As the selected thermoplastic polymer, it is appropriate to use low density polyethylene and as polyorganosiloxane polymethylsiloxane.

Extra-high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane may be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride may be used as the selected thermoplastic polymer and polyethylphenylsiloxane as polyorganosiloxane.

Thermoplastic polyurethane and polyorganosiloxane polymethylphenylsiloxane may also be used as the selected thermoplastic polymer.

As a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% In terms of the weight of the inner shell, and in quality can be used of polyorganosiloxane - polyphenylsiloxane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of ultra-high molecular weight polyethylene in the amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7 wt.% By weight of the inner can be used shell, and as a polyorganosiloxane ··? polymethylsiloxane.

As a mixture of two selected thermoplastic polymers, it is appropriate to use a mixture of polyvinyl chloride in an amount of 5-95 wt.% And thermoplastic polyurethane in an amount of 4.3-94.7 wt.% With respect to the weight of the inner shell, and as a polyorganosiloxane - polyethylphenylsiloxane.

It is desirable to place at least one additional reinforcing layer between the outer tubular sheath and the main reinforcement layer.

It is advantageous for the main reinforcement layer to be made of synthetic fibrous non-woven material.

The lateral edges of the thin-layer web, together with the associated main reinforcing layer, are sensibly joined by contact or overlap.

The problem is also solved by a two-layer blank of said coating on the inner surface of a pipeline comprising a main reinforcement layer connected to an inner tubular thin-layer sheath by a coating of thermoplastic polymeric thin-film material, which, according to the invention, is formed of a multicomponent systemic component -almost one polymer selected from the group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C, and a structural modifier of and the assembled polymer, wherein the inner thin-film tubular sheath together with the associated reinforcing layer are formed at least in one place interrupted longitudinally in the direction of the workpiece axis and their discontinuous ends are hermetically interconnected to form a coaxially arranged and bonded base reinforcement layer and inner tube thin-layer sheath.

The group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of at least 100 ° C may comprise low density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic, and the structural modifier of the selected polymer is a polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath may be formed by a multi-component homogeneous system comprising one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in an amount of 09.3-99.7% by weight relative to the total weight of the inner shell, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total weight of the inner shell.

As the selected thermoplastic polymer, it is appropriate to use low density polyethylene and as polyorganosiloxane polymethylsiloxane.

Extremely high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane may be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride may be used as the selected thermoplastic polymer and polyethylphenylsiloxane as polyorganosiloxane.

Thermoplastic polyurethane may also be used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% By weight of the inner sheath may be used. as polyorganosiloxane - polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, it is appropriate to use a mixture of ultra-high molecular weight polyethylene in an amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7 wt.% With respect to the weight of the inner shell, and use polymethylsiloxane as the polyorganosiloxane.

As a mixture of two selected thermoplastic polymers, it is desirable to use a mixture of polyvinyl chloride in an amount of 5-95 wt.% And thermoplastic polyurethane in an amount of 4.3-94.7 wt.% With respect to the weight of the inner shell, and as polyorganosiloxane to polymethylphenylsiloxane or polyethylphenylsiloxane is used.

It is advantageous for the reinforcing layer to be made of synthetic fibrous non-woven material.

The discontinuous ends of the inner tubular sheath bonded to the reinforcing layer may be hermetically bonded to one another by touching or by overlapping longitudinally in the direction of the axis of the bilayer blank.

The problem is also solved by a method for producing said two-layer blank of the created coating on the inner surface of a pipeline, comprising in that the inner tubular thin-layer coating on the base of thermoplastic polymeric material is bonded to the reinforcing layer, according to the invention, the inner tubular thin-film sheath is formed by a thin-layer web obtained from a multicomponent homogeneous system by mixing upon melting at least one polymer selected from the group of thermoplastic n limers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C and a structural modifier of the selected polymer binds the surface of this thin film to the reinforcing layer, then the lateral edges of the thin film are hermetically bonded together with the reinforcing layer bonded to the thin-layer web, thereby obtaining a two-layer preform of the coating from a coaxially arranged and interconnected reinforcing layer and an inner tubular thin-layer sheath.

The group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of at least 100 ° C may comprise low density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic, and the structural modifier of the selected polymer is a polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath may be obtained from a multicomponent homogeneous system by mixing upon melting one polymer or a mixture of two polymers selected from said thermoplastic polymer group and an amount of 99.3-99.7% by weight relative to of the total weight of the inner shell, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner shell.

As the selected thermoplastic polymer, it is appropriate to use low density polyethylene and as polyorganosiloxane polymethylsiloxane.

Extremely high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane may be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride may be used as the selected thermoplastic polymer and polyethylphenylsiloxane as polyorganosiloxane.

Thermoplastic polyurethane may also be used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% In terms of the weight of the inner shell, and in quality can be used of polyorganosiloxane - polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, it is appropriate to use a mixture of ultra-high molecular weight polyethylene in an amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7 wt.% With respect to the weight of the inner shell, and as polyorganosiloxane. polymethylsiloxane.

As a mixture of two selected thermoplastic polymers, it is reasonable to use a mixture of polyvinyl chloride in an amount of 5-95 wt.% And thermoplastic polyurethane in an amount of 4.3-94.7 wt.% In terms of the weight of the inner shell, and as a polyorganosiloxane - polymethylphenylsiloxane or polyethylphenylsiloxane.

It is advantageous for the main reinforcement layer to be made of synthetic fibrous non-woven material.

The lateral edges of the thin film bonded to the reinforcing layer are reasonably sealed by tapping or overlapping.

The rationale for all cut-off values for the intervals indicated in the method for applying said coating in the two-layer blank for this coating and in the method for preparing that blank are the same as in the coating according to the invention.

The coating according to the invention has the following advantages:

- high strength and tightness during operation;

-the complete absence of defects (creases, creases, etc.) of the inner surface formed by the inner thin-layer sheath, as well as the absence of sections of delamination of the latter from the coating, which ensures uniform movement of the fluid transported through the pipeline without energy losses;

- abrasion resistance;

- Resistance to the action of chemically active media and water, which significantly increases the shelf life and safety of the coating and enables it to be used for pipelines for different purposes.

The method of the invention for applying the claimed coating allows the coating to be applied, which has the advantages described above, by the use of a two-layer preform of the coating consisting of interconnected inner thin-layer sheathing and a basic reinforcing layer, such as makes it possible to facilitate the technology of manufacturing the multilayer blanket of the coating and to exclude the distortion, torsion, stretching of the inner thin-layer sheath during transport of said multilayer zogotovka coating inside the pipeline.

The two-layer workpiece according to the invention is characterized by high adhesion of the inner thin-layer coating to the main reinforcing layer, high strength and tightness, which enables it to be used to obtain a coating with the above advantages by the method according to the present invention .

The method of producing the two-layer blank according to the invention provides the opportunity to obtain the blank with the above advantages.

BRIEF DESCRIPTION OF THE FIGURES

The invention is illustrated by specific examples of its implementation and the accompanying figures, where:

.1 Figure 1 shows the coating according to the invention, in accordance with the claimed method, on the inner surface of the pipeline - axonometry;

FIG. 2 is the same as in FIG. 1, but enlarged in cross section; FIG. FIG. 3 is a section A of FIG. 2 on a larger scale;

FIG. 4 is another embodiment of the embodiment shown in FIG. 3 plot;

FIG. 5 is another embodiment of the embodiment shown in FIG. 3 plot;

FIG. 6 is another cross-sectional embodiment of the patented coating applied by the method according to the invention;

FIG. 7 is a section B of FIG. 6 on a larger scale;

FIG. 8 is another cross-sectional embodiment of the patented coating applied by the method of the invention;

FIG. 9 is a cross-sectional view of one embodiment of the coating applied by the method according to the invention;

FIG. 10 is one embodiment of the two-layer coating blank of FIG. 1 and 2 obtained by the method according to the invention is a cross-section;

FIG. 11 is another embodiment of the two-layer blank of the coating of FIG. 6, obtained by the method according to the invention, is a cross-section.

EXAMPLES FOR THE IMPLEMENTATION OF THE INVENTION

The coating for the inner surface of pipeline 1 (FIGS. 1 and 2) includes two coaxially arranged tubular thin-layer sheaths 2 and 3 based on thermoplastic polymeric material, one outer 2 adjacent to the inner surface of pipe 1 and the other outer 3 is separated therefrom by a coaxial base 4 and an additional 5 reinforcement layer impregnated with a curable polymer binder. The inner tube thin-layer sheath 3 is formed by a multicomponent homogeneous system comprising at least one polymer selected from the group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C, and by a structural modifier of the selected polymer, wherein the inner tube thin layer 3 together with the main reinforcing layer 4 are interrupted at least in one place longitudinally in the direction of the axis of the coating, their broken ends 6 and 7 respectively, being sealed with bonded to each other and this shell 3 forms a monolithic structure with the main reinforcing layer 4.

A group of thermoplastic polymers having a relative elongation _; not less than 200% and a melting point _; not less than 100 ° C, contains low-density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane, selected from polymethylsiloxane, selected from the group methylsiloxane; polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath 3 is formed by a multicomponent homogeneous system comprising one polymer or a mixture of two polymers selected from the specified group of thermoplastic polymers in an amount

99.3-99.7% by weight relative to the weight of the inner shell 3, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner shell 3.

Low density polyethylene may be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Extra-high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane may also be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride may be used as the selected thermoplastic polymer, and when polyorganosiloxane-polyethylphenylsiloxane is used, and when thermoplastic polyurethane is used as the selected thermoplastic polymer, polymethylphenylsiloxane is used as the polyorganosiloxane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% With respect to the weight of the inner shell 3 may be used. and, as polyorganosiloxane, polyphenylsiloxane.

A mixture of ultra-high molecular weight polyethylene in an amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7 wt. May be used as a mixture of selected thermoplastic polymers. % by weight of inner liner 3, and as polyorganosiloxane polymethylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of polyvinyl chloride in the amount of 5-95 wt.% And thermoplastic polyurethane in the amount of 4.3-94.7 wt.% By weight of the inner shell 3 may also be used, and as polyorganosiloxane - polymethylphenylsiloxane or polyethylphenylsiloxane.

The outer casing 2 may be made of polyethylene or multilayer polyethylene-polyamide tape.

The base reinforcement layer 4 is made of synthetic non-woven fibrous material, for example, of a polyester and / or polypropylene based synthetic lining.

The additional reinforcement layer 5 is made of a synthetic cap based on polyester and / or polypropylene fibers, fiberglass, fiberglass, combined fiberglass, thermoplastic fiber mesh, carbon fiber mesh.

Polymeric, epoxy, epoxypolyester binder, polyester binder compressed by air pressure and / or magnesium oxide is used as the polymer binder.

The discontinuous ends 6 and 7 of the inner tubular thin film sheath 3 together with the main reinforcing layer 4 are hermetically bonded by contact, as shown in FIG. 1, 2 and 3. The area of connection by sewing or welding the ends 6 and 7 is sealed, more precisely welded longitudinally in the direction of the axis of the coating (Fig. 1) through a strip 8 (Fig. 3) of material, identical to the material of the inner tube thin film 3.

In FIG. 4 and 5 show two more embodiments of sealing the discontinuous ends 6 and 7 of the inner tubular thin film sheath 3 together with the main reinforcing layer 4 by contact.

Thus, in FIG. 4, the ends 6 and 7 are covered by a longitudinally extending insertion 9 along the axis of the coating, for example fluoroplast, synthetic fabric, fiberglass, which in turn is covered by the strip 8.

In FIG. 5 shows the connection site by sewing or welding the ends 6 and 7, which are hermetically coated, welded longitudinally to the axis of the coating of the profile strip 10 with a T-shaped cross-section of material identical to the material of the inner tube thin-layer sheath 3 .

The discontinuous ends 6 and 7 of the inner tubular thin film shell 3 together with the main reinforcing layer 4 may be hermetically connected by overlapping, as shown in FIG. 6 and 7. Therefore, the lateral ends 6 (FIG. 7) and 7 are sewn or welded overlapped longitudinally on the axis of the coating and the connection site by sewing or welding is covered, namely welded, with material strip 8, identical to the material of the inner tube thin film 3.

In FIG. 8 shows an embodiment of the coating according to the invention, in which there is another additional reinforcing layer 11 located between the additional reinforcing layer 5 and the outer casing 2 and made of a synthetic polyester and / or polypropylene fiber base, fiberglass, fiberglass , kmbased fiberglass, thermoplastic fiber or carbon fiber mesh.

In FIG. 9 shows an embodiment of the coating according to the invention, in addition to having two additional reinforcing layers 5 and 11, another additional reinforcing layer 12 disposed between the layer 11 and the sheath 2 and made of a synthetic polyester and / or base polypropylene fibers, fiberglass, fiberglass, kmbased fiberglass, thermoplastic fibers or carbon fibers.

The method for applying the coating according to the invention to the inner surface of the pipeline consists in the fact that, outside the pipeline 1 (Figs. 1 and 2), the tubular thin-layer sheaths 2 and 3 are coaxially mounted on the basis of thermoplastic polymeric material, one of which - outer 2 is intended to be adjacent to the inner surface of pipeline 1 and the other to the inner 3 _? it is separated from the base 4 and additional 5 reinforcing layers, the latter are impregnated with a thermally curable polymer binder and a multilayer blank is obtained which is introduced into the pipeline 1 and then fed into the cavity of the inner shell 3 below pressure coolant with subsequent heat treatment and hardening of the binder. Prior to bonding the impregnated multilayer billet, the web material forming the main reinforcing layer 4 is bonded to the thin film web forming the inner thin-layer sheath 3 and obtained from the multicomponent homogeneous system by mixing upon melting at least one polymer selected from the group of thermoplastic polymers not less than 200% and melting point _? not less than 100 ° C, and a structural modifier of the selected polymer, after which the lateral edges 6 and 7 of the thin film are interconnected together with the main reinforcement layer 4 connected thereto, to form a two-layer blank of the coating, shown in FIG. 10, from the coaxially arranged and interconnected reinforcing layer 4 and the inner tubular thin film sheath 3, and the already obtained bilayer blank, together with the additional reinforcing layer 5, is coaxially positioned with respect to the outer tubular thin film sheath 2.

A group of thermoplastic polymers having a relative elongation _; not less than 200% and a melting point of not less than 100 ° C contains low density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath 3 is obtained from the multicomponent homogeneous system by mixing upon melting one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers and an amount of 99.3-99.7% by weight relative to the total mass of inner liner, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of inner liner 3.

As the selected thermoplastic polymer, it is appropriate to use low density polyethylene and as polyorganosiloxane polymethylsiloxane.

Ultra-high molecular weight polyethylene and polyorganosiloxane as polymethylsiloxane may also be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride can be used as the selected thermoplastic polymer and polymethylphenylsiloxane as polyorganosiloxane - polyethylphenylsiloxane, and when selected for thermoplastic polymer thermoplastic polyurethane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% With respect to the weight of the inner shell 3 may be used. and, as polyorganosiloxane, polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of ultra-high molecular weight polyethylene in an amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7% by weight relative to the weight of the inner shell 3 can be used, and as polyorganosiloxane polymethylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of polyvinyl chloride in the amount of 5-95 wt.% And thermoplastic polyurethane in the amount of 4.3-94.7 wt.% With respect to the weight of the inner shell 3 may be used, and as polyorganosiloxane - polymethylphenylsiloxane or polyethylphenylsiloxane.

The outer casing 2 is made of polyethylene or a multi-layer polyethylene-polyamide strip.

The base reinforcement layer 4 is made of synthetic fibrous non-woven material, for example, of a synthetic liner based on polyester and / or polypropylene fibers.

The additional reinforcement layer 5 is made of a synthetic cap based on polyester and / or polypropylene fibers, fiberglass, fiberglass, combined glass, thermoplastic fiber, carbon fiber mesh.

Polyester, epoxy, epoxypolyester binder, polyester binder compressed with pressurized air and / or magnesium oxide are used as the polymer binder.

According to one embodiment of the method of the invention, the lateral edges 6 and 7 of the thin film together with the associated main reinforcing layer 4 are hermetically bonded by contact, as shown in FIG. 1-5, and according to another embodiment, are hermetically linked by overlapping, as shown in FIG. 6 and 7.

In FIG. 8 and 9 show embodiments of the method according to the invention, according to which, respectively, an additional reinforcing layer 11 (Fig. 8) or two additional reinforcing layers 11 and 12 are placed between the additional reinforcing layer 5 and the outer casing 2. (Fig. 9), wherein the layers 11 and 12 are made as in the above-described coating.

Although the above described embodiments of the claimed coating and the method of applying it according to the invention, in which there are only one, two or three additional reinforcing layers, and that the inner tube thin layer 3, together with the associated its main reinforcement layer 4 is interrupted only in one place longitudinally in the direction of the axis of the coating, this does not limit our rights, which are stated in the claims of the invention.

Next, the claimed two-layer blank of the coating already described and the process for its preparation according to the invention will be described.

The claimed two-layer blank (according to FIGS. 10 and 11) of said coating (FIGS. 1-9) on the inner surface of the pipeline includes a main reinforcing layer 4 connected to an inner tubular thin-layer sheath 3 by a coating based on thermoplastic polymeric thin-film material. The inner tube thin-layer sheath 3 is formed by a multicomponent homogeneous system comprising at least one polymer selected from the group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of ₇ not less than 100 ° C. and a structural modifier of the selected polymer, wherein the inner tubular thin layer 3 together with the associated reinforcing layer 4 are formed at least in one place interrupted in the direction of the workpiece axis and their discontinuous ends 6 and 7 are hermetically connected their coaxially arranged and interconnected main reinforcement layer 4 and an inner tube thin layer 3.

A group of thermoplastic polymers having a relative elongation _; not less than 200% and a melting point of at least 100 ° C, contains low-density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is the selected organolex, from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath 3 is formed by a multicomponent homogeneous system containing one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in an amount of 99.3-99.7% by weight relative to the total weight of the the inner shell, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total weight of the inner shell 3.

Low density polyethylene may be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Ultra-high molecular weight polyethylene and polyorganosiloxane as polymethylsiloxane may also be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate or poly-organosiloxane as polymethylphenylsiloxane may also be used.

Polyvinyl chloride may be used as the selected thermoplastic polymer and polyethylenephenylsiloxane as polyorganosiloxane as well as thermoplastic polyurethane as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% By weight of the inner sheath may be used. as polyorganosiloxane - polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of ultra-high molecular weight polyethylene in the amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7 wt.% By weight of the inner shell can be used, and as polyorganosiloxane polymethylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of polyvinyl chloride in the amount of 5-95% by weight and thermoplastic polyurethane in the amount of 4.3-94.7% by weight relative to the weight of the inner shell can also be used, and as polyorganosiloxane - polymethylphenylsiloxane or polyethylphenylsiloxane.

The reinforcing layer 5 is made of synthetic fibrous non-woven material, for example, of a polyester and / or polypropylene based synthetic lining.

The discontinuous ends 6 and 7 of the inner tube thin layer 3 connected to the main reinforcing layer 4 are hermetically connected by contacting longitudinally in the direction of the axis of the bilayer blank of the coating, as shown in FIG. 10 by stitching or welding and welding on the area of stitching or welding by the inner tube thin layer 3 to a strip 8 of material identical to the material of the inner tube thin layer 3.

The discontinuous ends 6 and 7 of the inner tubular thin film shell 3 bonded to the reinforcing layer 4 can be hermetically connected to each other and by overlapping the axis of the bilayer blank of the coating, as shown in FIG. 11 by sewing or welding overlapping and welding on the seam or weld area of the inner tube thin film 3 to a strip 8 of material identical to that of the inner tube thin layer 3.

The method for producing said two-layer blank of the created coating on the inner surface of the pipeline consists in that the inner tube thin-layer sheath 3 of said coating based on thermoplastic polymer material is connected to the main reinforcing layer 4. The inner inner tube 3 is formed from a thin film fabric obtained from a multicomponent homogeneous system by mixing with melting at least one polymer selected from a group of thermoplastic polymers having a relatively elongated is-not less than 200% and a melting temperature _at not lower than 100 ° C and a structural modifier of the selected polymer, binds this thin cloth with the cloth of the material forming the main reinforcing layer 4, then the side edges ( 6, 7) of the thin film, together with the reinforcing layer 4 connected to the thin film, are hermetically bonded to each other, thereby obtaining a two-layer blank of the coaxially arranged and interconnected reinforcing layer 4 and an inner tube thin film 3.

The group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of at least 100 ° C contains low density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic, and the structural modifier of the selected polymer is a polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner tube thin-layer sheath 3 is obtained from a multicomponent homogeneous system by mixing upon melting one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers and an amount of 99.3-99.7 wt.% With respect to the total weight of the inner liner, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner liner 3.

Low density polyethylene may be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Supermolecular polyethylene and polyorganosiloxane as polymethylsiloxane may also be used as the selected thermoplastic polymer.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane.

As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate may be used and, as polyorganosiloxane, polymethylphenylsiloxane.

Polyvinyl chloride may be used as the selected thermoplastic polymer, and polyethylphenylsiloxane as polyorganosiloxane, and thermoplastic polyurethane when selected thermoplastic polymer, polymethylphenylsiloxane as the polyorganosiloxane.

In addition, as a mixture of two selected thermoplastic polymers, a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% By weight of the inner sheath may be used. as polyorganosiloxane - polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of ultra-high molecular weight polyethylene in the amount of 5-95 wt.% And a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7 wt.% By weight of the inner shell can be used, and as polyorganosiloxane polymethylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of polyvinyl chloride in the amount of 5-95 wt.% And thermoplastic polyurethane in the amount of 4.3-94.7 wt.% In terms of the weight of the inner shell and in the form of polyorganosiloxane may be used. polymethylphenylsiloxane or polyethylphenylsiloxane.

The base reinforcement layer 4 is made of synthetic fibrous non-woven material, for example, of a polyester and / or polypropylene based synthetic lining.

The lateral edges 6 and 7 of the thin film bonded to the reinforcing layer 4 are hermetically bonded to each other by contact, as shown in FIG. 10, by sewing or welding, and by welding on the spot of sewing or welding, on the side of the inner thin-layer sheath 3 of a strip 8 of a material identical to the material of the inner thin-layer sheath 3.

The lateral edges 6 and 7 of the thin film bonded to the reinforcing layer 4 are hermetically bonded to each other by overlapping, as shown in FIG. 11 by overlapping or welding at the sewing or welding site, from the inside a thin-film tubular sheath 3 of a strip 8 of material identical to the material of the inner thin-film thin-film sheath 3.

Although the above described embodiments of the two-layer coating billet according to the invention have been described, and the claimed method of preparing this blank, which describes the embodiment of the inner shell together with the associated reinforcement layer, broken in one place longitudinally in the direction of the workpiece axis, this does not limit our rights as set forth in the claims.

Below will be described in detail specific embodiments of the claimed coating applied by the method of the invention, which will also detail the patented two-layer blank of the claimed coating obtained by the method according to the invention.

EXAMPLE 1

Outside the conduit 1 (Figs. 1 and 2), the outer tubular thin-layer casing 2 of thermoplastic polymeric material, namely from

At * and polyethylene, and the inner tube thin film sheath 3, around which the main reinforcing layer 4 is placed, such that it is coaxially disposed between the outer 2 and inner 3 thin wall sheath and forms with the last two-layer blank blank.

A thin-film web based on a thermoplastic polymeric material, namely a homogeneous system, is obtained for the fabrication of the inner tube thin-film casing 3 of such a workpiece, which is obtained by mixing upon melting low density polyethylene in an amount of 99.7% by weight. the total mass of the inner liner 3 and its structural modifier polymethylsiloxane in an amount of 0.3 wt.% relative to the total mass of the inner liner 3. The thin-layer web is connected by the method of calendering to the web of the axle a ram reinforcement layer 4 of synthetic fibrous non-woven material, namely a polyester fiber based synthetic liner; the lateral edges 6 and 7 of the interconnected webs are sewn in contact, the seam on the side of the thin layer is hermetically covered, namely, a band 8 of a material identical to the material of the inner tubular sheath 3 is soldered, thus obtaining the - above two-layer blank of the coating (Figure 10).

A co-axially additional fiberglass reinforcement layer 5 is inserted between the outer tubular thin film sheath 2 and the main reinforcing layer 4.

The base 4 and the additional 5 reinforcing layers are impregnated with a binder based on an unsaturated polyester resin.

The layered structure of the coating billet thus obtained is introduced into the repairing (in the under construction) section of pipeline 1 through a well (shaft) by means of special mechanisms and attachments (not shown in the figures). However, there is no deformation, torsion, destruction of the inner tubular thin-layer sheath 3, due to the connection of the latter with the main reinforcing layer 4 in the claimed two-layer blank (Fig. 10), made according to the proposed method.

A coolant is fed into the cavity of the inner tube thin layer 3 and the binder is solidified in the following mode: -cooler - saturated water vapor;

- temperature of the heat carrier - 100 ° C;

- a pressure of 0.05 mRj;

- Hardening time - 2 hours.

As a result, a monolithic structure is formed of the inner tube thin-layer sheath 3 with the main reinforcing layer 4, which leads to a significant increase in the quality of the proposed coating applied by the claimed method, and therefore to an increase in the performance characteristics of the coating, water resistance and chemical resistance. resistance:

- destructive bending stress, MPa: 140-200;

- Stratification resistance, MPa: 8-12;

-water absorption, wt%: 0.4-0.5;

- Resistance to 10% H ₂ SO ₄ - no degradation of the proposed coating occurs when exposed for 1 month at a temperature of 20-22 ° C.

EXAMPLE 2

The process was carried out analogously to Example 1.

The same materials as in Example 1 were used for the coating, except for the material of the inner tube thin-layer sheath 3 and the additional reinforcing layer 5.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing low density polyethylene in an amount of 99.5 wt% relative to the total mass of the inner sheath 3 and polymethyl siloxane in an amount of 0.5 wt. % in relation to the total mass of the inner shell.

The additional reinforcement layer 5 is made of a synthetic polyester fiber base.

Between the additional reinforcement layer 5 (FIG. 8) and the outer thin layer sheath 2, a further polyester fiber based additional reinforcing layer 11 is coaxially inserted.

The curing mode is as in Example 1 except the curing time, which is 3.5 hours.

The same result was obtained as in Example 1.

EXAMPLE 3

The process was carried out analogously to Example 2.

The same coating materials as in Example 1 were used except the material of the inner thin-layer sheath 3 and the additional reinforcing layer

5.

The inner thin layer sheath 3 is formed by a homogeneous system containing low density polyethylene in an amount of 99.3 wt% relative to the total weight of the inner sheath 3 and polymethyl siloxane in an amount of 0.7 wt. % in relation to the total mass of the inner shell.

The additional reinforcement layer 5 is formed by a carbon fiber network.

The curing mode is carried out according to Example 2, except for the coolant temperature which is 90 ° C.

The same result was obtained as in Example 1.

EXAMPLE 4

The process proceeds analogously to Example 1, except for the step of sealing the side edges 6 and 7 of the thin film and of the synthetic non-woven material, which is done by welding the side edges 6 and 7 in contact.

The same materials as in Example 1 were used for the coating, except the material for the inner thin-layer sheath 3 and the binder.

The inner thin-layer sheath 3 is formed by a homogeneous system containing ultra-high molecular weight polyethylene in an amount of 99.7 wt.% With respect to the total mass of the inner sheath 3 and its structural modifier polymethylsiloxane in an amount of 0.3 wt. % in relation to the total mass of the inner shell.

An epoxy polyester binder is used to impregnate the reinforcing layers 4 and 5.

The cure mode of the binder was as indicated in Example 3 except for the vapor pressure which was 0.07MPa.

The results are identical to those of Example 1.

EXAMPLE 5

The process was carried out analogously to Example 4.

The same materials as in Example 4 were used for the coating, except the materials for the inner thin-layer sheath 3 and the additional reinforcing layer

5.

The inner thin-layer sheath 3 is formed by a homogeneous system containing ultra-high molecular weight polyethylene in an amount of 99.5% by weight relative to the total weight of the inner shell 3 and a structural modifier polymethylsiloxane in an amount of 0.5% by weight relative to the total mass of the inner shell 3.

The additional reinforcement layer 5 is meshed with polyester fiber based mesh.

The curing mode is according to Example 4, except for the heat carrier temperature of 80 ° C and the steam pressure of 0.1 MPa.

The results are the same as in Example 1.

EXAMPLE 6

The process was carried out analogously to Example 4.

The same coating materials as in Example 4 were used, except for the material of the inner tube thin film 3.

The inner tube thin-layer sheath 3 is formed by a homogeneous system containing ultra-high molecular weight polyethylene in an amount of 99.3 wt. % relative to the total mass of the inner shell 3 and polymethylsiloxane in an amount of 0.7% by weight relative to the total mass of the inner shell 3.

No additional reinforcement layer 5.

Before the coolant was fed into the cavity of the inner tube thin layer 3, a pressure of 0.01 MPa was supplied for 20 minutes, then the coolant was fed and the binder solidified as in Example 1.

The same results were obtained as in Example 1.

EXAMPLE 7

The process was carried out analogously to Example 1.

The coating materials are the same as in Example 1, with the exception of the materials for the inner tube thin layer 3 and for the main reinforcing layer 4.

The inner tubular thin film sheath 3 is formed by a homogeneous system comprising polypropylene in an amount of 99.7% by weight relative to the total mass of the inner shell 3 and polyphenylsiloxane in an amount of 0.3% by weight relative to the total mass of the inner shell 3.

The main reinforcement layer 4 is formed by a polypropylene-based synthetic lining.

The curing mode is the same as that of Example 3, except for the coolant temperature which is 110 ° C.

The results are the same as in Example 1.

EXAMPLE 8

The process was carried out analogously to Example 7, except for the step of sealing the side edges 6 and 7 of the interconnected webs of the thin layer and the reinforcing material, which is done by sewing these overlaps (Figs. 7 and 11).

The coating materials are the same as in Example 7, except for the materials for the inner tube thin layer 3 and for the additional reinforcing layer 5.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing polypropylene in an amount of 99.5% by weight relative to the total weight of the inner shell 3 and polyphenylsiloxane in an amount of 0.5% by weight of the total mass of the inner shell 3.

The additional reinforcing layer 5 is formed by a synthetic polypropylene fiber based lining.

The curing mode proceeds according to Example 7, except for the curing time which is 5 hours.

The results are the same as in Example 7.

EXAMPLE 9

The process was carried out analogously to Example 7.

The coating materials are the same as in Example 7, except for the material of the inner tube thin-layer sheath 3.

The inner tube thin-layer sheath 3 is formed by a homogeneous system containing polypropylene in an amount of 99.3 wt. % relative to the total mass of the inner shell 3 and polyphenylsiloxane in an amount of 0.7% by weight relative to the total mass of the inner shell 3.

The main reinforcement layer 4 is made of a synthetic polypropylene fiber backing.

Between the additional reinforcing layer 5 (Fig. 8) and the outer thin film coaxilano coating 2 is placed another additional reinforcing layer 11 of a polypropylene-based synthetic lining.

The curing mode is similar to that in Example 8, except for the pressure which is 0.1 MPa.

The results are the same as in Example 7.

EXAMPLE 10

The process was carried out analogously to Example 9.

The coating materials are the same as in Example 9, except for the material of the outer 2 and inner 3 tubular thin-layer sheaths and of the additional reinforcing layers 5 and 11.

The outer thin film sheath 2 is made of a multilayer polyethylene polyamide sheet.

The inner tubular thin film sheath 3 is formed by a homogeneous system comprising a copolymer of propylene with vinyl acetate in an amount of 99.7 wt. by weight relative to the total mass of the inner liner 3 and polymethylphenylsiloxane in an amount of 0.3% by weight relative to the total mass of the inner liner 3.

The additional reinforcement layer 5 is made of fiberglass.

The additional reinforcement layer 11 is made of a carbon fiber network.

Between the outer thin layer sheath 2 (Fig. 9) and the additional reinforcing layer 11 of coaxilano, another additional fiberglass reinforcing layer 12 is placed.

The curing mode is similar to that in Example 8.

The results are the same as in Example 9.

EXAMPLES

The process was carried out analogously to Example 10.

The coating materials are the same as in Example 10, except for the material of the inner tube thin-layer sheath 3 and the additional reinforcing layers 5 and 11.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing a copolymer of propylene with vinyl acetate in an amount of 99.5 wt. by weight relative to the total mass of the inner liner 3 and polymethylphenylsiloxane in an amount of 0.5% by weight relative to the total mass of the inner liner 3.

The additional reinforcement layer 5 is made of composite glass.

The additional reinforcing layer 11 is formed by a synthetic mesh of a mixture of polyester and polypropylene fibers.

The results are the same as in Example 10.

EXAMPLE 12

The process was carried out analogously to Example 10.

The coating materials are the same as in Example 10, except for the material of the inner tube thin-layer sheath 3, of the additional reinforcing layer 11, of the additional reinforcing layer 12 and of the binder.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing a copolymer of propylene with vinyl acetate in an amount of 99.3 wt. by weight relative to the total mass of the inner liner 3 and polymethylphenylsiloxane in an amount of 0.7% by weight relative to the total mass of the inner liner 3.

The additional reinforcement layer 11 is made of a web based on polypropylene fibers.

The additional reinforcement layer 12 is made of a synthetic base based on polypropylene fibers.

The binder is epoxy.

The curing mode is similar to that in Example 8.

The results are the same as in Example 10.

EXAMPLE 13

The process was carried out analogously to Example 2.

The difference is that at the location of the seam connecting the lateral edges 6 and 7 (Fig. 4) of the thin-layer and the reinforcing web of the two-layer blank of the coating, between the indicated location, on the side of the thin-layer material, and the material strip 8 identical to that of the inner thin-layer sheath 3, a fluoroplast insert 9 of such a width is provided that allows the seam to be completely covered but less than the width of the strip 8 by a material identical to the material of the inner sheath 3.

In this case, the strip 8 is soldered at its lateral ends to the inner thin-layer sheath 3 longitudinally in the direction of the workpiece axis and a hermetic connection is obtained.

The coating materials are the same as in Example 2, except the material of the inner thin-layer sheath 3, the additional reinforcing layer 5 and the binder.

The inner tubular thin film sheath 3 is protected by a homogeneous system comprising polyvinyl chloride of 99.7% by weight relative to the total weight of the inner shell 3 and polyethylphenylsiloxane in an amount of 0.3% by weight relative to the total mass of the inner shell 3.

The additional reinforcement layer 5 is made of fiberglass.

The binder is polyester, compressed with compressed air.

Prior to supplying the coolant to the cavity of the inner thin-layer sheath 3, a pressure of 0.05 MPa was supplied for 10 minutes, then the coolant was fed and the binder was solidified according to Example 2.

The results are the same as in Example 2.

EXAMPLE 14

The process was carried out analogously to Example 13.

The coating materials used are the same as in Example 13, except for the material of the inner thin-layer sheath 3, the additional reinforcement layer 5, the additional reinforcement layer 11 and the insert 9.

The inner tubular thin film sheath 3 is protected by a homogeneous system comprising polyvinyl chloride and an amount of 99.5% by weight relative to the total weight of the inner shell 3 and polyethylphenylsiloxane in an amount of 0.5% by weight relative to the total mass of the inner shell 3.

The additional reinforcement layer 5 is formed by a carbon fiber network.

The additional reinforcement layer 11 is formed of composite glass.

Curing was carried out as in Example 13.

The results are the same as in Example 13.

EXAMPLE 15

The process is similar to Example 13.

The coating materials used are the same as in Example 13, except for the material of the inner thin-layer sheath 3, the additional reinforcing layer 11 and the insert 9.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing polyvinyl chloride in an amount of 99.3 wt% with respect to the total mass of the inner sheath 3 and polyethylphenylsiloxane in an amount of 0.7 wt% with respect to the total mass of the inner sheath 3.

The additional reinforcement layer 11 is made of fiberglass.

The insert 9 is made of fiberglass.

The solidification was as in Example 13.

The results are the same as in Example 13.

EXAMPLE 16

The process proceeds analogously to Example 10.

The difference is that instead of the strip 8 in FIG. 3, to seal the seam, a profile strip 10 with a T-shaped cross-section of material identical to the material of the inner thin-layer sheath 3 is used, as shown in FIG. 5.

The coating materials used are the same as in Example 10, except for the material of the inner thin-layer sheath 3, the base reinforcement layer 4 and the additional reinforcement layer 12.

The inner tube thin-layer sheath 3 is formed by a homogeneous β / Ч HCH Г »F F4VIZ / · 1 1 II ΤΑΟ« «LGP * * ΛΙ ΙΛ> I PA и and, GLLTS11! _ **** ΑλιιΑπΛύή tf WITH PALT nA Λ 1ΑΖ \ Ζ * · Τ · ΛΙΑ hh

CMviGwiq, COURT OF COURSE ιορινίνι ιπαυ ι rncn ιιυ / πιγμνιαπ net υνηυοοια pa ιιμυυι t tw / iri & is ι & ρ d amount of 99.7% by weight relative to the total weight of the inner liner. total mass of inner liner 3.

The main reinforcement layer 4 is made of a synthetic mesh made of a mixture of polyester and polypropylene fibers.

The additional reinforcement layer 12 is made of fiberglass.

The curing mode is as in Example 10.

The results are the same as Example 10.

EXAMPLE 17

The process is similar to Example 16.

The coating materials are the same as in Example 16, except for the material of the inner thin layer coating 3. of the additional reinforcing layer 11 and of the additional reinforcing layer 12.

The inner tube thinner> oynes shell 3 is a homogeneous system comprising thermoplastic polyurethane based on simple polyester in a quantity of 99.5% by weight relative to the total weight of the inner shell 3 and pOmethylphenylsil oxane in an amount of 0.5 wt. % by ratio of total mass of inner liner.

The additional reinforcement layer 11 is made of fiberglass.

The additional reinforcement layer 12 is made up of a web of polyester fibers.

Dawuin.T uq DTpvrtnaoaua Q ιζαιζτη nnu pg »m» yog »IQ t V / lXritVIL / l I IV * U <PWM | 4 / IL44I IV V I 1MG1 I ie.Fr IV.

Dahu * tAtm * a λλ ηη iiimtA rh r-irxi a * agchgh 40 t aoy / uaiHia υα ioitkna, naniu d upHiviGjj> kl

Pgimeg ΙΟ

The process is similar to Example 17.

The coating materials are the same as in Example 17. except for the material of the inner thin layer sheath 3 and the additional aiomyas layer

12.

B * ITGCHA 11 lUOTO Tgui ^ io T * ULli ^ rV * A / lCiUSI n ^ DMpKP ABOUT GGT Vr> BJinrAUUP

W OI pwviuiiu * I C4 I fJ wvpFiu * I wi IKVVI ivriiiM viwriMKU w w vv ^ wj Dwnu VI / will VI VMliU

MAATAA hrs

ΑΙ4ΛΤΑ11Α LCH HCH nv / l'MIin ΤΑΑ »A ^ l ~ t A <4Z * 4 ^ I II IAI I nA * Ml / PATA II IjA AALIAn ATA IIQ CHAMBER PAMAAMAA MS ViKIV I VIVICl) V OD Ru / MAIL I UpiV D amount 99.3% by weight relative to the total mass of the inner shell 3 and polymethylphenylsiloxane in the amount of 0.7% by weight relative to the total mass of the inner shell 3.

The additional reinforcement layer 12 is made of composite glass.

Curing mode:

- heat carrier - water;

- temperature of the heat carrier - 95 ° C;

- pressure - 0.05 MPa;

- Hardening time - 6 hours.

The results are the same as in Example 17.

EXAMPLE 19

The process proceeds analogously to Example 8, except for the connection of the side ends 6 and 7 (Figs. 6, 7 and 11), which is done by overlapping welding.

The coating materials are the same as in Example 8, except for the material of the inner tube thin-layer sheath 3.

The inner tube thin film sheath 3 is formed by a homogeneous system containing low density polyethylene in an amount of 5% by weight relative to the total mass of the inner shell 3, polypropylene in an amount

94.7% by weight relative to the total mass of the inner shell 3 and polyphenylsiloxane in an amount of 0.3% by weight relative to the total mass of the inner shell 3.

The curing mode is as in Example 18, except for the heat carrier temperature of 80 ° C and the pressure of 0.1 MPa.

The results are the same as in Example 7.

EXAMPLE 20

The process is similar to Example 18.

The coating materials are the same as in Example 18, except for the material of the inner tube thin-layer sheath 3, the additional reinforcing layers 5 and 12 and the binder.

ze

The inner tubular thin film sheath 3 is formed by a homogeneous system comprising low density polyethylene in an amount of 45% by weight, propylene in an amount of 44.5% by weight and polyphenylsiloxane in an amount of 0.5% by weight relative to the total mass of the inner shell. 3.

The additional reinforcing layers 5 and 12 are formed by a synthetic casing of a mixture of polyester and polypropylene fibers.

The binder is polyester, compressed with compressed air and magnesium oxide.

The curing mode is according to Example 7.

The results are the same as in Example 18.

EXAMPLE 21

The process is similar to Example 20.

The coating materials are the same as in Example 20, except for the material of the inner thin-layer sheath 3 and the additional reinforcing layer 12.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing low density polyethylene in an amount of 95% by weight, propylene in an amount of 4.3% by weight and polyphenylsiloxane in an amount of 0.7% by weight relative to the total weight of the inner shell 3.

The additional reinforcement layer 12 is made of carbon fiber.

The curing mode is as in Example 5, except for the curing time which is 6 hours.

The results are the same as in Example 20.

EXAMPLE 22

The process proceeds analogously to Example 10.

The coating materials are the same as in Example 10, except for the material of the inner thin-layer sheath 3, the base reinforcement layer 4 and the additional reinforcement layer 12.

The inner tube thin-layer sheath 3 is formed by a homogeneous system comprising ultra-high molecular weight polyethylene in an amount of 5 Wfetc.%, A copolymer of propylene with vinyl acetate in the amount of 94.7 wt.% And polymethylsiloxane in an amount of 0.3 wt. the inner shell 3.

The base reinforcement layer 4 is made as in Example 1, the additional reinforcement layer is made of a synthetic polyester fiber based lining.

The curing mode is as in Example 9 except for the temperature being 110 ° C.

The results are the same as in Example 22.

EXAMPLE 23

The process is similar to Example 22.

The coating materials are the same as in Example 22 except for the material of the inner thin-film sheath 3 and the binder.

The inner tube thin-layer sheath 3 is formed by a homogeneous system comprising ultra-high molecular weight polyethylene in an amount of 45% by weight, a copolymer of propylene with vinyl acetate in an amount of 44.5% and polymethylsiloxane in an amount of 0.5% by weight mass of the inner shell 3.

The binder is based on an unsaturated polyester resin thickened with magnesium oxide.

The cure mode is ₇ as in Example 22.

The results are the same as in Example 22.

EXAMPLE 24

The process proceeds analogously to Example 6.

The coating materials are the same as in Example 6 except for the material of the inner thin-layer sheath 3.

The inner tube thin-layer sheath 3 is formed by a homogeneous system comprising ultra-high molecular weight polyethylene in an amount of 95% by weight, a copolymer of propylene with vinyl acetate in an amount of 4.3% and polymethylsiloxane in an amount of 0.7% by weight mass of the inner shell 3.

The curing mode is as in Example 22.

The results are the same as in Example 6.

EXAMPLE 25

The process is similar to Example 13.

The coating materials are the same as in Example 13 except for the material of the inner thin-layer sheath 3.

The inner tube thin-layer sheath 3 is formed by a homogeneous system comprising polyvinyl chloride in an amount of 5% by weight, thermoplastic polyurethane based on simple polyester in an amount of 94.7% by weight and polymethylphenylsiloxane in an amount of 0.3% by weight total mass of inner liner 3.

The curing mode is as in Example 19, except for the coolant temperature of 50 ° C and the curing time of 15 hours.

The results are the same as in Example 13.

EXAMPLE 26

The process proceeds analogously to Example 14.

The coating materials are the same as in Example 14, except the material of the inner thin-layer sheath 3.

The inner tubular thin film sheath 3 is formed by a homogeneous system comprising polyvinyl chloride in an amount of 45% by weight, thermoplastic polyurethane in an amount of 44.5% by weight, and polymethylphenylsiloxane in an amount of 0.5% by weight, taken with respect to the total mass of the inner shell. 3.

The solidification mode is as in Example 14, except for the air pressure of 0.1 MPa and the air supply time of 5 minutes.

The results are the same as in Example 14.

EXAMPLE 27

The process is similar to Example 15.

The coating materials are the same as in Example 15 except for the material of the inner thin-layer sheath 3.

The inner tubular thin film sheath 3 is formed by a homogeneous system containing polyvinyl chloride in an amount of 95% by weight, thermoplastic polyurethane in an amount of 4.3% and polymethylphenylsiloxane in an amount of 0.7%, taken relative to the total weight of the inner shell. 3.

The curing mode is as in Example 15, except for the pressure which is 0.2 MPa and the cure time which is 10 hours.

The results are the same as in Example 15.

EXAMPLE 28

It is analogous to Example 25, only in the homogeneous system of the inner thin layer sheath 3 instead of polymethylphenylsiloxane used polyethylphenylsiloxane taken in the same amount.

The curing mode is as in Example 25.

The results are the same as in Example 25.

EXAMPLE 29

It is analogous to Example 26, except that in the homogeneous system of the inner thin layer sheath 3, polyethylphenylsiloxane, taken in the same amount, is used instead of polymethylphenylsiloxane.

The curing mode is as in Example 26.

The results are the same as in Example 26.

EXAMPLE 30

It is analogous to Example 27, except that in the homogeneous system of the inner thin layer sheath 3, polyethylphenylsiloxane, taken in the same amount, is used instead of polymethylphenylsiloxane.

The curing mode is as in Example 27.

The results are the same as in Example 27.

In the description of the embodiments contemplated, specific narrow terminology is used for the sake of clarity. However, the invention is not limited to accepted terms, and it should be borne in mind that each such term encompasses all equivalent terms operating analogously and used to accomplish similar tasks.

Although the present invention is described in connection with a preferred type of embodiment, it is understood that its scope includes all variations and variations that do not deviate from the idea and scope of the invention, which can be easily understood by those skilled in the art.

These variations and variations are not considered to go beyond the scope and scope of the invention and the appended claims.

INDUSTRIAL APPLICABILITY OF THE INVENTION

The invention can be used in the construction of various pipelines, as well as in the repair of in-service pipelines.

Claims (62)

Patent Claims 1. Coating on the inner surface of a pipeline, comprising two coaxially arranged tubular thin-layer sheaths based on thermoplastic polymeric material, one of which - the outer one - is adjacent to the inner surface of the pipeline and the other inner is separated from it by a coaxial layer , impregnated with a curable polymeric substance, characterized in that the inner tubular thin-layer sheath (3) is formed by a multicomponent homogeneous system containing at least one polymer selected from the group n thermoplastic polymers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C and a structural modifier of the selected polymer, wherein the inner tubular thin-film sheath (3) together with the main reinforcing layer (4) are made in at least one location interrupted longitudinally in the direction of the axis of the coating, their broken ends (6, 7) being hermetically interconnected, and this shell (3) forms a monolithic structure with the main reinforcing layer (4). Coating according to claim 1, characterized in that the group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point? not less than 100 ° C, contains low-density polyethylene, ultra-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane, selected polymethylsiloxane, selected from the group methylsiloxane; polyphenylsiloxane and polyethylphenylsiloxane. Coating according to claim 2, characterized in that the inner tubular thin-layer sheath (3) is formed by a multicomponent homogeneous system comprising one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in an amount of 99, 3-99.7% by weight relative to the total weight of the inner shell (3), and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner shell (3). Coating according to claim 3, characterized in that low density polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane. 5. The coating according to claim 3, characterized in that ultra-high molecular weight polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane. The coating according to claim 3, characterized in that polypropylene is used as the selected thermoplastic polymer and polyphenylsiloxane as the polyorganosiloxane. Coating according to claim 3, characterized in that a copolymer of propylene with vinyl acetate and a polyorganosiloxane polymethylphenylsiloxane is used as the selected thermoplastic polymer. The coating according to claim 3, characterized in that polyvinyl chloride is used as the selected thermoplastic polymer and polyethylphenylsiloxane as the polyorganosiloxane. A coating according to claim 3, characterized in that thermoplastic polyurethane is used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane. A coating according to claim 3, characterized in that a mixture of low density polyethylene in the amount of 5-95% by weight and polypropylene in the amount of 4.3-94.7% by weight is used as a mixture of two selected thermoplastic polymers. with respect to the weight of the inner shell (3) and polyphenylsiloxane was used as the polyorganosiloxane. 11. The coating according to claim 3, characterized in that a mixture of ultra-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7% is used as a mixture of two selected thermoplastic polymers. . % by weight of the inner liner (3) and polymethylsiloxane was used as the polyorganosiloxane. A coating according to claim 3, characterized in that a mixture of two selected thermoplastic polymers uses a mixture of polyvinyl chloride in an amount of 5-95% by weight and thermoplastic polyurethane in an amount of 4.3-94.7% by weight on the weight of the inner shell (3) and polymethylphenylsiloxane or polyethylphenylsiloxane was used as the polyorganosiloxane. A coating according to any one of claims 1, 2 or 3, characterized in that it provides at least one additional reinforcing layer (5) coaxially arranged between the outer tubular thin-layer sheath (2) and the main reinforcing layer (4). . Coating according to one of claims 1, 2 or 3, characterized in that the main reinforcing layer is made of synthetic non-woven fibrous material. Coating according to one of Claims 1, 2 or 3, characterized in that the broken ends (6, 7) of the inner tubular thin film (3) together with the main reinforcing layer (4) are sealed by contact. Coating according to one of Claims 1, 2 or 3, characterized in that the broken ends (6, 7) of the inner tube thin film (3) together with the main reinforcing layer (4) are hermetically connected by overlapping. 17. Coating method on the inner surface of a pipeline, comprising the fact that, outside the pipeline (1), the tubular thin-layer sheaths (2, 3) are coaxially based on thermoplastic polymeric material, one of which is the outer (2) _? is intended to be adjacent to the inner surface of the pipeline (1) and the other inner (3) is separated therefrom by a basic reinforcing layer (4), the latter is penetrated with a thermally curable polymeric binder and a three-layer preform is obtained, which is introduced into the interior of the pipeline (1), after which a coolant is supplied under pressure in the cavity of the inner tube thin layer (3), with subsequent heat treatment and curing of the binder, characterized in that the main reinforcing layer (4) is binds to the inner tube thin layer (3) by connecting the surfaces of the main reinforcing layer (4) and the inner tube thin layer (3) formed by a thin layer fabric obtained from a multicomponent homogeneous system by blending with at least one polymer a group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of _? not less than 100 ° C, and a structural modifier of the selected polymer, and by subsequently sealing the side edges (6, 7) of the thin film web together with the main reinforcement layer (4) associated therewith, to obtain a two-layer blank of the coating of coaxially arranged and interconnected reinforcing layer (4) and an inner tube thin layer (3), and the already obtained two-layer preform is coaxially applied to the outer tube thin layer (2). A method according to claim 17, characterized in that the thermoplastic polymer group having a relative elongation of at least 200% and a melting point of at least 100 ° C contains low density polyethylene, ultra-high molecular weight polyethylene, polypropylene , a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenyls lkosan. A method according to claim 18, characterized in that the inner tubular thin-layer sheath (3) is obtained from a multicomponent homogeneous system by mixing upon melting one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers and 99,3-99,7% by weight relative to the total weight of the inner shell (3), and polyorganosiloxane in the amount of 0,3-0,7% by weight relative to the total mass of the inner shell (3). 20. The method of claim 18, wherein the low density polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane as the polyorganosiloxane. 21. The method according to claim 18, characterized in that ultra-high molecular weight polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane. 22. A method according to claim 18, characterized in that polypropylene is used as the selected thermoplastic polymer and polyphenylsiloxane as the polyorganosiloxane. A method according to claim 18, characterized in that a propylene-vinyl acetate copolymer is used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane. A method according to claim 18, characterized in that polyvinyl chloride is used as the selected thermoplastic polymer and polyethylphenylsiloxane as the polyorganosiloxane. A method according to claim 18, characterized in that thermoplastic polyurethane is used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane. 26. A method according to claim 18, characterized in that a mixture of two selected thermoplastic polymers uses a mixture of low density polyethylene in the amount of 5-95 wt.% And polypropylene in the amount of 4.3-94.7 wt.% with respect to the weight of the inner liner (3) and, as polyorganosiloxane, to polyphenylsiloxane. A method according to claim 18, characterized in that a mixture of ultra-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7% is used as a mixture of two selected thermoplastic polymers. % by weight of inner liner (3) and, as polyorganosiloxane, polymethylsiloxane. 28. The method of claim 18, wherein a mixture of two selected thermoplastic polymers uses a mixture of polyvinyl chloride in an amount of 5-95 wt.% And thermoplastic polyurethane in an amount of 4.3-94.7 wt.% on the weight of the inner liner (3) and, as polyorganosiloxane, polymethylphenylsiloxane or polyethylphenylsiloxane. A method according to one of claims 17,18 or 19, characterized in that at least one additional reinforcing layer (5) is placed between the outer tubular thin-layer sheath (2) and the main reinforcing layer (4). Method according to one of claims 17,18 or 19, characterized in that the main reinforcing layer (4) is made of synthetic fibrous non-woven material. A method according to any one of claims 17,18 or 19, characterized in that the lateral edges (6,7) of the thin-layer web together with the associated main reinforcing layer (4) are connected by contact A method according to any one of claims 17,18 or 19, characterized in that the side edges (6,7) of the thin-layer web together with the associated main reinforcing layer (4) are interconnected. 33. A two-layer blank coating of the inner surface of a pipeline comprising a main reinforcing layer (4) connected to an inner tubular thin-film sheath (3) of a coating based on a thermoplastic polymer thin-film material, characterized in that the inner tubular thin film (4) 3) is formed by a multi-component homogeneous system comprising at least one polymer selected from the group of thermoplastic polymers having a relative elongation of not less than 200% and a melting point of not less than 100 ° C, and structural mo a diffuser of the selected polymer, wherein the inner tubular thin-film sheath (3) together with the associated main reinforcing layer (4) are formed at least in one place interrupted longitudinally in the direction of the workpiece axis and their broken ends (6, 7) are connected hermetically sealed, coaxially arranged and interconnected reinforcing layer (4) and inner tubular thin-layer sheath (3) are formed. 34. Double-layer preform according to claim 33, characterized in that the group of thermoplastic polymers having an elongation-at least 200% and a melting point ₇ is not less than 100 ° C, contains a low-density polyethylene, ultra-high molecular weight polyethylene, polypropylene, copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxylene san and polyethylphenylsilkosan. 35. A two-layer workpiece according to claim 34, characterized in that the inner tube thin-layer sheath (3) is formed by a multicomponent homogeneous system containing one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in 99,3-99,7% by weight relative to the total weight of the inner shell (3), and polyorganosiloxane in the amount of 0,3-0,7% by weight relative to the total mass of the inner shell (3). 36. The bilayer according to claim 35, characterized in that low density polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane is used as the polyorganosiloxane. 37. The bilayer according to claim 35, characterized in that ultra-high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane are used as the selected thermoplastic polymer. 38. A two-layer blank according to claim 35, characterized in that polypropylene is used as the selected thermoplastic polymer and polyphenylsiloxane as the polyorganosiloxane. 39. A two-layer workpiece according to claim 35, characterized in that a propylene-vinyl acetate copolymer is used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane. 40. A two-layer workpiece according to claim 35, characterized in that polyvinyl chloride is used as the selected thermoplastic polymer and poly-organosiloxane as polyethylphenylsiloxane. 41. The bilayer according to claim 35, characterized in that thermoplastic polyurethane is used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane. 42. A two-layer blank according to claim 35, characterized in that a mixture of low density polyethylene in an amount of 5-95% by weight and polypropylene in an amount is used as a mixture of two selected thermoplastic polymers. 4,3-94,7% by weight relative to the weight of the inner shell (3), and polyphenylsiloxane was used as the polyorganosiloxane. 43. A two-layer workpiece according to claim 35, characterized in that as a mixture of two selected thermoplastic polymers a mixture of ultra-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7 is used % by weight relative to the weight of the inner liner (3) and polymethylsiloxane is used as the polyorganosiloxane. A bilayer according to claim 35, characterized in that a mixture of two selected thermoplastic polymers uses a mixture of polyvinyl chloride in an amount of 5-95% by weight and thermoplastic polyurethane in an amount of 4.3-94.7% by weight by weight of the inner liner (3) and polymethylphenylsiloxane or polyethylphenylsiloxane is used as the polyorganosiloxane. A two-layer workpiece according to one of claims 33, 34 or 35, characterized in that the main reinforcing layer (4) is made of synthetic fibrous non-woven material. A bilayer according to one of Claims 33, 34 or 35, characterized in that the broken ends (6, 7) of the inner tube The 4S thin-layer sheath (3) bonded to the base reinforcement layer (4) are sealed together by touching longitudinally in the direction of the axis of the bilayer blank of the coating. A bilayer according to one of claims 33, 34 or 35, characterized in that the discontinuous ends (6, 7) of the inner tube thin film (3) connected to the main reinforcing layer (4) are sealed together longitudinal overlap along the axis of the bilayer blank of the coating. 48. A method for producing a two-layer blank coating on the inner surface of a pipeline, wherein the inner tubular thin-layer coating (3) based on thermoplastic polymer material is bonded to the main reinforcing layer (4), characterized by in that the inner tubular thin-layer sheath (3) is formed by a thin-layer web obtained from a multicomponent homogeneous system by mixing upon melting at least one polymer selected from a group of thermoplastic polymers having relatively not less than 200% and a melting point of not less than 100 ° C and a structural modifier of the selected polymer, bind the surface of this thin film web and the main reinforcing layer (4), then the lateral edges ( 6, 7) of the thin-layer web are hermetically interconnected together with the main reinforcement layer (4) connected to the thin-layer fabric, thus obtaining a two-layer blank of the coaxially arranged and interconnected main reinforcing layer (4) and an inner tube thin film sheath (3). 49. The method of claim 48, wherein the thermoplastic polymer group having a relative elongation of at least 200% and a melting point of at least 100 ° C comprises low density polyethylene, ultra-high molecular weight polyethylene, polypropylene , a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenyls lkosan. A method according to claim 49, characterized in that the inner tubular thin-layer sheath (3) is obtained from a multicomponent homogeneous system by mixing upon melting one polymer or a mixture of two polymers selected from said thermoplastic polymer group in an amount of 99.3-99.7% by weight relative to the total weight of the inner shell (3), and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total mass of the inner shell (3). 51. The method of claim 50, wherein the low density polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane as the polyorganosiloxane. 52. The method according to claim 50, characterized in that ultra-high molecular weight polyethylene is used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane. 53. The method of claim 50, wherein polypropylene is used as the selected thermoplastic polymer and polyphenylsiloxane as the polyorganosiloxane. The method of claim 50, wherein a propylene-vinyl acetate copolymer is used as the selected thermoplastic polymer and polymethylphenylsiloxane is used as the polyorganosiloxane. 55. The method of claim 50, wherein polyvinyl chloride is used as the selected thermoplastic polymer and polyethylphenylsiloxane as polyorganosiloxane. 56. The method of claim 50, wherein thermoplastic polyurethane is used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane. 57. The method according to claim 50, wherein a mixture of two selected thermoplastic polymers uses a mixture of low density polyethylene in an amount of 5-95 wt.% And polypropylene in an amount of 4.3-94.7 wt.% with respect to the weight of the inner liner (3) and, as polyorganosiloxane, to polyphenylsiloxane. 58. The method of claim 50, wherein a mixture of ultra-high molecular weight polyethylene in an amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7% is used as a mixture of two selected thermoplastic polymers. % by weight of inner liner (3) and, as polyorganosiloxane, polymethylsiloxane. 59. The method of claim 50, wherein a mixture of two selected thermoplastic polymers uses a mixture of polyvinyl chloride in an amount of 5-95% by weight and thermoplastic polyurethane in an amount of 4.3-94.7% by weight the weight of the inner liner (3) and, as polyorganosiloxane, polymethylphenylsiloxane or polyethylphenylsiloxane. Method according to one of claims 48,49 or 50, characterized in that the main reinforcing layer (4) is made of synthetic fibrous non-woven material. A method according to any one of claims 48,49 or 50, characterized in that the lateral edges (6, 7) of the thin film bonded to the main reinforcing layer (4) are sealed together by contact. A method according to any one of claims 48,49 or 50, characterized in that the side edges (6, 7) of the thin film bonded to the main reinforcing layer (4) are sealed together by overlapping.