CN109604124A - A kind of node anti-corrosion method that submarine pipeline penetrating ground logs in - Google Patents
A kind of node anti-corrosion method that submarine pipeline penetrating ground logs in Download PDFInfo
- Publication number
- CN109604124A CN109604124A CN201811525232.3A CN201811525232A CN109604124A CN 109604124 A CN109604124 A CN 109604124A CN 201811525232 A CN201811525232 A CN 201811525232A CN 109604124 A CN109604124 A CN 109604124A
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- layer
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- resin glue
- submarine pipeline
- epoxide
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- 238000005260 corrosion Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 44
- 239000010410 layer Substances 0.000 claims abstract description 44
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 239000003292 glue Substances 0.000 claims abstract description 34
- 239000003822 epoxy resin Substances 0.000 claims abstract description 33
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 33
- 239000004593 Epoxy Substances 0.000 claims abstract description 19
- 239000004743 Polypropylene Substances 0.000 claims abstract description 19
- 230000007797 corrosion Effects 0.000 claims abstract description 17
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 239000011521 glass Substances 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 15
- 230000001680 brushing effect Effects 0.000 claims abstract description 12
- 239000003973 paint Substances 0.000 claims abstract description 11
- 230000037452 priming Effects 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 9
- 239000011152 fibreglass Substances 0.000 claims abstract description 7
- 239000011241 protective layer Substances 0.000 claims abstract description 7
- 230000006698 induction Effects 0.000 claims abstract description 5
- -1 polypropylene Polymers 0.000 claims abstract description 5
- 229920001155 polypropylene Polymers 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 11
- 238000010892 electric spark Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000037303 wrinkles Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 230000000916 dilatatory effect Effects 0.000 abstract 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 229920002748 Basalt fiber Polymers 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000002421 anti-septic effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011007 installation qualification Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- CHBCHAGCVIMDKI-UHFFFAOYSA-N [F].C=C Chemical group [F].C=C CHBCHAGCVIMDKI-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000004843 novolac epoxy resin Substances 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000005945 translocation Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
- F16L58/1072—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sprayed layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a kind of node anti-corrosion method that submarine pipeline penetrating ground logs in, corrosion-inhibiting coating is made of epoxy primer, polypropylene thermal shrinkage band and fiber glass epoxy protective layer.It is characterized in that its construction technology are as follows: submarine pipeline node surface cleans derusting → surface preheating → priming paint coating → mid-frequency induction heating → with PP pyrocondensation belt package and winds entire the 1st layer of epoxide-resin glue of node → brushing → after surface coating initial set, continue to brush the 2nd layer of the 1st layer of epoxide-resin glue → winding the 3rd layer of glass fabric → brushing the 2nd layer of epoxide-resin glue → winding the 4th layer of glass fabric → brushing epoxide-resin glue, to surface coating initial set, continue to brush the 5th layer of epoxide-resin glue, completes the process after initial set.The present invention can solve conventional corrosion-inhibiting coating penetrating ground return drag log in when node erosion resistant coating be easy to damage, it is dilatory fall off, submarine pipeline return drag during because suffered resistance is excessive and the problem of be destroyed.
Description
Technical field
The present invention relates to Offshore Engineering fields, anti-more particularly to a kind of node that submarine pipeline penetrating ground logs in
Rotten method.
Background technique
Submarine pipeline refers between Offshore Units and plays between Offshore Units and land terminal medium translocation
Pipeline, submarine pipeline node refer to the junction between finished product submarine pipeline.2 kinds of the node corrosion-inhibiting coating of submarine pipeline routine,
Respectively 3LPE erosion resistant coating (being made of epoxy primer and polyethylene thermal contraction strap) and 3LPP erosion resistant coating are (by epoxy primer and poly- third
Alkene shrink belt composition)；When submarine pipeline carries out back dragging penetrating ground, node corrosion-inhibiting coating is easy to damage and destroys, sternly
It can even draw and fall off when weight；The outer anti-corrosion failure of submarine pipeline can not only be made, protect submarine pipeline cannot；And node anti-corrosion
Layer return drag in fall off, returning for submarine pipeline can be blocked and drag channel, increase submarine pipeline returning resistance during dragging, work as seabed
Pipeline itself return drag stress excessive or stress concentrate when, be more easily damaged, cause submarine pipeline penetrating ground return drag unsuccessfully.
Wherein most similar retrieval is as follows:
State Intellectual Property Office discloses the patent document of Publication No. CN107774545A, Yi Zhongtian on March 9th, 2018
Right gas long distance pipeline anti-corrosion method, it is characterised in that carry out as follows: the preparation of transition coating: being 3 according to weight ratio:
2 ratio by novolac epoxy resin glue and organic solvent be placed in reaction kettle be thoroughly mixed uniformly after, sequentially add metal oxygen
Compound and phthalic anhydride are uniformly mixed up to transition coating；The preparation of function coating: being 8:1's according to weight ratio
Ratio weighs suitable Kynoar powder and basalt fibre, is dissolved in tetrahydrofuran solution respectively.Heating gathers inclined fluorine
Ethylene powder and tetrahydrofuran solution make it dissolve, and basalt fibre ultrasonic disperse is in tetrahydrofuran solution, and then ultrasound is mixed
Nano-bentonite and molybdenum disulfide is added after closing 30-40min, obtains function coating after mixing；The coating of coating: incited somebody to action
It crosses coating to be uniformly applied on duct wall, after 30min, function coating is mixed with organic solvent of ketone, was uniformly applied to
It crosses on layer material, curing of coatings after 1 hour.
Zai You State Intellectual Property Office discloses the patent text of Publication No. CN 108869898A on November 23rd, 2018
It offers, a kind of insulation antiseptic petroleum pipeline, which is characterized in that the insulation antiseptic petroleum pipeline includes pipeline outer-layer, is arranged in institute
It states the protective layer on pipeline outer-layer side, the insulating layer that the pipeline outer-layer other side is set, be arranged in the insulating layer one
The pipeline lining of side is dashed forward with the integrally formed water conservancy diversion protrusion of the pipeline lining, setting in the pipeline lining and the water conservancy diversion
Play the corrosion-resistant coating on surface；The protective layer is plastic protective film for plastics layer；The insulating layer includes reflective insulation layer, is arranged in institute
The rubber layer stated the froth bed of reflective insulation layer side, the froth bed side is set；The corrosion-resistant coating is anti-for organosilicon
Etching ground layer.
Zai You State Intellectual Property Office discloses the patent document of Publication No. CN 107701856A on 2 16th, 2018,
A kind of corrosion-resistant pipeline configuration, it is characterized in that, including pipeline and the corrosion protective covering for being coated on pipeline external, the section shape of pipeline
Shape is cirque structure, and the inner wall of corrosion protective covering is cylindrical structure and is interference fitted with pipeline outer wall, corrosion protective covering
Outer wall is positive hexagonal structure, and several first grooves are uniformly provided on the inner wall of corrosion protective covering, are equipped with sealing in the first groove
Pad, gasket fit with pipeline outer wall.
By retrieval, it has not been found that having process flow with the method for the present invention and the similar submarine pipeline of composed structure
Or the method for pipeline corrosion protection.
Summary of the invention
In order to overcome above-mentioned deficiency, present invention aims at providing, and a kind of node that submarine pipeline penetrating ground logs in is anti-
Rotten method.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of section that submarine pipeline penetrating ground logs in
Point anti-corrosion method, node corrosion-inhibiting coating are made of epoxy primer, polypropylene thermal shrinkage band and fiber glass epoxy protective layer；It is applied
Work process flow includes: to carry out surface cleaning derusting → surface preheating → priming paint coating → Medium frequency induction to submarine pipeline node to add
Heat → with PP pyrocondensation belt package winds entire the 1st layer of epoxide-resin glue of node → brushing → after surface coating initial set, continues to apply
Brush the 1st layer of the 2nd layer of epoxide-resin glue → winding the 3rd layer of glass fabric → brushing the 2nd layer of glass fibers of epoxide-resin glue → winding
The 4th layer of epoxide-resin glue of Wei Bu → brushing continues to brush the 5th layer of epoxide-resin glue, surface coating after surface coating initial set
After initial set, i.e., corrosion-inhibiting coating is fully completed.
Further, described to carry out surface cleaning derusting to submarine pipeline node, cleaning result requires steel tube surface
Contamination-free, derusting grade needs are tested so that derusting grade meets the requirement of Sa 2.5 in the specification of ISO 8504, and surface
Depth of abrasion pattern meets 8503 specification 50-100 μ m of ISO.
Further, the described priming paint coating, steel tube surface primer uniformly and to meet base coat thickness big
In 250 μm of requirement.
Further, the mid-frequency induction heating heats epoxy primer using medium-frequency heating coil, it is desirable that by
It is hot uniform, and temperature will control within the scope of 175-210 DEG C, make liquid epoxy solidifying priming paint.
Further, PP pyrocondensation belt package winds entire node, and PP pyrocondensation belt and the tube body coating lap of splice are full
Foot requires, after the completion of pyrocondensation belt package, Yao Jinhang appearance test and electric spark detection.
Further, the brushwork epoxy resin glue and winding glass fabric, it is desirable that brushwork epoxy resin glue is uniform
And thickness reaches requirement, after epoxide-resin glue initial set, then is wound glass fabric, uniform winding is also wanted, in this mistake
Guarantee no-sundries in journey, to ensure the quality of fiber glass epoxy protective layer.
Further, appearance test needs reach: PP pyrocondensation belt surface answers smooth, no wrinkle, bubble-free, without burning
It is coked.
Further, leak detection voltage used in the described electric spark detection is 15kV, electric spark leak detector device according to
NACE RP0274 code requirement carries out 100% leak detection to PP pyrocondensation belt, cannot find any leak source.
Detailed description of the invention
Fig. 1 is a kind of node anti-corrosion schematic diagram that submarine pipeline penetrating ground logs in of the present invention.
Wherein: 1, steel pipe tube body；2, tube body coating；3, epoxy primer；4, polypropylene thermal shrinkage band；5, fiber glass epoxy is anti-
Sheath.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention includes: surface cleaning derusting is carried out to submarine pipeline node, is carried out at this time clear
It after clean, strictly tests to derusting grade, derusting grade therein meets the requirement of Sa 2.5 in the specification of ISO 8504, and surface
Depth of abrasion pattern meets in the specification of ISO 8503 in 50-100 μ m.Lap-joint pre-processes followed by node, has pre-processed
Surface preheating is carried out after finishing, and just can carry out priming paint coating in steel tube surface after preheating, primer is uniformly and thickness will expire
Sufficient base coat thickness is greater than 250 μm；Epoxy primer is heated using medium-frequency heating coil after the completion of smearing, is required at this time heated
Uniformly, and temperature will control within the scope of 175-210 DEG C, it is therefore an objective to make liquid epoxy solidifying priming paint；Priming paint carries out heating in medium frequency
After the completion, propane gas gun is recycled to carry out the winding of PP pyrocondensation belt package, PP pyrocondensation belt and the tube body coating lap of splice meet
It is required that after the completion of pyrocondensation belt package, Yao Jinhang appearance test and electric spark detection, it is ensured that pyrocondensation belt installation qualification, appearance test
It is required that PP pyrocondensation belt surface answers smooth, no wrinkle, bubble-free, nothing to burn charing；And the practical leak detection voltage of electric spark testing requirements
100% leak detection is carried out to PP pyrocondensation belt according to 0274 code requirement of NACE RP for the electric spark leak detector device of 15kV, is examined extremely
Until that cannot find any leak source；After pyrocondensation belt installation qualification, brushing second layer epoxide-resin glue and first layer winding glass are carried out
Glass fiber cloth after epoxide-resin glue initial set, then is wound glass fabric, also wants uniform winding；It closes in this process
Key needs to guarantee no-sundries, then gradually carries out according to construction technology, to ensure the quality of fiber glass epoxy protective layer；Hereafter
Structure is epoxide-resin glue, epoxide-resin glue, glass fabric, epoxide-resin glue, glass fabric, epoxide-resin glue, epoxy
Resin glue, i.e., after process are as follows: brush the 1st layer of epoxide-resin glue → after surface coating initial set after, continue brush the 2nd layer of asphalt mixtures modified by epoxy resin
The 1st layer of rouge glue → winding the 3rd layer of glass fabric → brushing the 2nd layer of glass fabric → brushing the 4th of epoxide-resin glue → winding
Layer epoxide-resin glue continues to brush the 5th layer of epoxide-resin glue, after surface coating is pre-hardening, at this time should after surface coating initial set
Corrosion-inhibiting coating is fully completed.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs in, it is characterised in that: its node corrosion-inhibiting coating is by epoxy
Priming paint, polypropylene thermal shrinkage band and fiber glass epoxy protective layer composition；Its construction technology process include: to submarine pipeline node into
Row surface cleaning derusting → surface preheating → priming paint coating → mid-frequency induction heating → PP pyrocondensation belt package is used to wind entire node
The 1st layer of epoxide-resin glue of → brushing → and after surface coating initial set, continue to brush the 1st layer of glass of the 2nd layer of epoxide-resin glue → winding
The 3rd layer of glass fiber cloth → brushing the 2nd layer of epoxide-resin glue → winding the 4th layer of epoxide-resin glue of glass fabric → brushing, to table
After coating materials initial set, continue to brush the 5th layer of epoxide-resin glue, after surface coating initial set, i.e., corrosion-inhibiting coating is fully completed.
2. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 1, it is characterised in that: institute
That states carries out surface cleaning derusting to submarine pipeline node, and cleaning result requires steel tube surface contamination-free, and derusting grade needs
It tests so that derusting grade meets the requirement of Sa 2.5 in the specification of ISO 8504, and surface depth of abrasion pattern meets ISO 8503
50-100 μ m in specification.
3. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 1, it is characterised in that: institute
The priming paint coating stated uniformly and will will meet the requirement that base coat thickness is greater than 250 μm in steel tube surface primer.
4. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 1, it is characterised in that: institute
The mid-frequency induction heating stated heats epoxy primer using medium-frequency heating coil, it is desirable that is heated evenly, and temperature will control
Within the scope of 175-210 DEG C, make liquid epoxy solidifying priming paint.
5. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 1, it is characterised in that: institute
The PP pyrocondensation belt package stated winds entire node, and PP pyrocondensation belt and tube body coating overlap, and after the completion of pyrocondensation belt package, to carry out outer
It sees and examines and electric spark detection.
6. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 1, it is characterised in that: institute
The brushwork epoxy resin glue and winding glass fabric stated, it is desirable that brushwork epoxy resin glue is uniform, after epoxide-resin glue initial set,
It is wound glass fabric again, also wants uniform winding, guarantees no-sundries in this process to ensure that fiber glass epoxy protects
The quality of layer.
7. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 5, it is characterised in that: institute
Stating appearance test and needing to reach makes the surfacing of PP pyrocondensation belt, no wrinkle, bubble-free, nothing burn charing.
8. a kind of node anti-corrosion method that submarine pipeline penetrating ground logs according to claim 5, it is characterised in that: institute
Stating leak detection voltage used in electric spark detection is 15kV, and electric spark leak detector device is according to 0274 code requirement of NACE RP to PP
Pyrocondensation belt carries out 100% leak detection, until not finding any leak source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811525232.3A CN109604124B (en) | 2018-12-13 | 2018-12-13 | Node anticorrosion method for submarine pipeline through stratum landing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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