JP2777064B2 - Pressure surge resistance bursting plate assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to rupturable pressure relief devices.

[0002]

2. Description of the Related Art A rupturable pressure relief device generally includes a rupturable member, such as a disk, having a specified strength such that it ruptures when a predetermined fluid pressure is applied. The rupturable disc or rupturable disc is usually secured between a pair of annular support members located within a pressure relief passageway or tube connected to a container or system protected from overpressure.

[0003] While a single rupture disk supported between support members is commonly used, composite rupture disk assemblies having two or more rupturable portions supported between the support members are also available. Is known. One such composite rupture disk assembly includes a perforated rupture member made of metal or other strong material, and a resilient sealing member is disposed near the rupture member.
Additional components, such as resilient sealing member protection, and additional perforated rupture members are often included in the composite rupture disc assembly.

Conventional rupture disc assemblies, including single rupture discs or multiple rupture discs, have been very successful commercially in various overpressure protection applications. However, if the container or system to be protected is subjected to an instantaneous pressure surge that exceeds the predetermined burst pressure of the rupture disk, less than desirable results often occur. For example, if pressurized liquid, such as liquefied petroleum gas, is transported in a tank truck or tank car, sudden movement or stoppage of the tank will cause the pressurized liquid to move inside the tank, thereby temporarily increasing the pressure inside the tank. Soaring. Such pressure surges can cause a temporary overpressure condition, which can cause the rupture disc assembly to rupture without pressure relief from the protected vessel or system.

[0005]

Accordingly, even if an overpressure condition is momentarily caused by a temporary pressure surge inside the protected container or system, it resists rupture, but gradually becomes overpressured. There is a need for a rupture disc assembly that bursts when it reaches the required pressure relief.

[0006]

SUMMARY OF THE INVENTION In accordance with the present invention, there is provided a pressure surge resistant rupturable plate assembly adapted to be hermetically secured across a pressurized fluid contained in a passageway. A first bursting member having a bursting pressure and a second bursting member having a predetermined bursting pressure and facing at least one pressurized fluid and having at least one opening for permitting restricted pressurized fluid flow; Wherein the assembly further comprises at least one relatively small opening located on the side facing the pressurized fluid in the second rupturable member,
A pressure surge resistant rupture disk assembly is provided that includes at least one flow restricting member that further restricts flow of pressurized fluid through the opening and the opening of the second rupturable member.

The assembly is configured such that when the pressure of the pressurized fluid slowly increases to an overpressure condition, the overpressure condition passes through the at least one relatively small opening in the at least one flow restricting member to the first. Transmitted to the rupture member of the first
The rupturable member bursts at its predetermined burst pressure to relieve overpressure, but when the overpressure condition is due to an instantaneous surge, pressurization through at least one relatively small opening in the flow restricting member As a result of the restriction of the flow of the fluid, the transmission of the overpressure state to the first rupturable member is prevented, and the pressure is at least a value obtained by adding the burst pressure of the second rupturable member to the burst pressure of the first rupturable member. No rupture occurs until exceeding.

According to the present invention, when the pressure of the fluid slowly rises to an overpressure state, the overpressure of the container or system containing the pressurized fluid is released, but the overpressure is momentarily caused as a result of the pressure surge. It also provides a method to prevent overpressure from being released when pressure is reached.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring first to FIGS. The illustrated assembly 10 is hermetically secured between a pair of annular support members in the form of an inlet pipe flange 12 and an outlet pipe flange 14.
The inlet flange 12 is hermetically connected to the tube 16. The tube 16 is connected to a container or system containing the pressurized fluid. Outlet flange 14 is connected to tube 18. This tube directs the pressurized fluid escaped by the rupture disk assembly 10 to a containment or disposal location.

The assembly 10 includes an annular locating member 20, a first rupturable member 22, an elastic sealing member 24, a second rupturable member 26, a first flow restricting member 28, and a second flow restricting member 28. A member 30 and a support member 32 are provided. A conventional gasket 34 is provided between the rupture disc assembly and the inlet flange to ensure a seal between the rupture disc assembly 10 and the inlet flange 12. Between the inlet flange 12 and the outlet flange 14, a burst disk assembly 10 and a gasket 34
Are secured together by a plurality of studs 36 and nuts 38.

As best shown in FIG. 4, the locating member 20 is made of a rigid material. The locating member includes a central upright 40 connected to a flat annular flange member 42. The use of a locating assembly 20 in the assembly 10 is optional, but if included, the components determine the position of the assembly and the inlet flange 12 and the outlet flange 14, and are handled and installed. It serves to protect the rupture disk 22 from being damaged during its operation.

As shown, the first rupture disk 22 is a generally circular portion of a flat, rigid material having a plurality of equally spaced elongated slits 44 formed therein.
The slits extend radially outwardly from the solid central portion 25 and terminate inside the perimeter so that a flat annular solid flange portion 46 remains in the rupturable member 22,
The slits 44 form a plurality of sectors 48 in the rupturable member 22. To facilitate fabrication and avoid sharp protrusions,
An aperture 50 can be provided at each end of the slit 44. However, the aperture 50 is optional and can be omitted. Further, a slot can be used instead of the slit 44.

The sealing member 24 can generally be made of a resilient, corrosion resistant plastic and has a peripheral dimension and shape corresponding to the peripheral dimension and shape of the first rupturable member 22.

In the illustrated form, the second rupturable member 26
Is the same as that of the first rupturable member 22. The predetermined burst pressure of the first rupturable member and the second rupture member can be different, such that one is higher than the other, but the predetermined burst pressure of the second rupture member 26 is the first burst pressure. Preferably, it is approximately equal to or lower than the predetermined burst pressure of the member 22.

In the embodiment shown, the first flow restricting member 28 is made of an elastic plastic material, such as the material from which the sealing member 24 is made, and a pair of intersecting slits 58, 60 are formed in the center of the member 28. Is done.

The second flow restricting member 30 is also made of a resilient plastic material and has a plurality of radial slits 62 formed near its periphery. The slits 62 are equally spaced around the flow restricting member 30.

The support member 32 is a flat circular member made of a strong material, the diameter of which is the member 20,2.
2, 24, 26, 28, 30 larger than the diameter. The periphery of the support member 32 is bent upward to form an annular lip 64. Once the various parts of the assembly 10 have been assembled, the lip 64 is moved to the member 2 as shown in FIG.
It is folded over the outer perimeter of 0, 22, 24, 26, 28, 30 to hold the members together firmly. The flat central portion of the support member 32 includes a plurality of slots 66. The slots extend radially outwardly from the solid portion 68 and terminate near the periphery of the support member 32. Slot 66 forms a plurality of sectors 69 in support member 32. The sectors are arranged to coincide with the sectors 48, 56 formed by the respective slits of the first rupturable member 22 and the second rupturable member 26. Also,
The slit 62 of the second flow restricting member 30 is
To the slot 66 of the first position.

As described above, the position determining member 20 is optional. Also, the support member 32 can take various forms other than that shown, and can secure or hold the various members in the assembly 10 together in various different ways than those described above. The inlet flange 12 and the outlet flange 14 include a rising surface portion. These riser surfaces cooperate with the annular flange portion of the assembly 10. Positioning member 2
If a zero is used, its upstanding surface 40 extends into the annular support member 14 to position the assembly 10 within the inlet flange 12 and the outlet flange 14 during assembly.

Next, the operation of the assembly 10 will be described. Fluid pressure from the vessel or system to be protected is applied to the tube 16, the inlet flange 12, the slot 66 in the support member 32, the slit 62 in the second flow restricting member 30, and the first flow restricting member 2.
Eight slits 58, 60 and the slit 52 and aperture 57 of the second rupturable member 26 are added to the resilient sealing member 24 of the assembly 10. When the fluid pressure reaches the elastic sealing member 24, the elastic sealing member deforms and contacts the first rupturable member 22. When a reverse pressure differential is temporarily applied to the assembly 10 by applying a higher pressure through the tube 18 than the pressure applied to the assembly 10 through the tube 16, the opposite pressure is applied to the slit 44 and the aperture 5.
0 to the sealing member 24, which deforms and contacts the second rupturable member 26. In such a back pressure situation, support member 32 supports second rupturable member 26, first flow restricting member 28, and second flow restricting member 30 to prevent reverse rupture of assembly 10.

Assembly 1 from protected container or system
The fluid pressure applied to zero places the first rupturable member 22 in tension and the fluid pressure rises relatively slowly to an overpressure condition, reaching the rupture pressure of the first rupturable member 22,
If the tensile strength of the solid portion of the rupturable member 22 between the two of the apertures 50 at the inner end of the slit 44 is exceeded, the rupturable member 22 is ruptured by a first tear or tear between the two apertures 50. , And there is a break between the remaining apertures except the two furthest apart apertures. Due to manufacturing errors in the length of the solid portion between the apertures 50 at the inner end of the slit 44, all solid portions except the longest solid portion are torn, and the rupturable member 22 shown in FIG. Central portion 25 remains attached to one of the sectors 48. Bursting member 22
When the rupture occurs, the elastic sealing member 24 also ruptures, releasing pressure through the assembly 10. As the pressurized fluid flows through the assembly 10, the second rupturable member 26 and the first flow restrictor 2
The eighth and second flow restricting members 30 and the support member 32 are ruptured as shown in FIG. First bursting member 22
As in the case above, the central portion 54 of the second rupturable member 26 and the central portion 68 of the support member 32 remain attached.

After the rupture and the first pressure relief, the composite rupture disc assembly 10 is fully opened and the first rupture member 2
The second sector 48 and the sector 5 of the second rupturable member 26
6 and the sector formed by the slot 66 of the support member 32 are bent upward to completely relieve the pressure of the protected pressure vessel or system. Upon rupture, the substantially similar fan-shaped portions of the resilient sealing member 24 and the first and second flow restricting members 28 and 30 also rupture. First, in order to give the desired predetermined burst pressure to those rupture members,
The burst pressure is controlled as described in US Pat. No. 4,905,722, incorporated herein by reference, to eliminate the trial and error techniques required in the fabrication of the rupturable member 22 and the second rupturable member 26 of US Pat. A notch is formed between two of the apertures at the inner end of the slit of the rupturable member.

In the manner shown in US Pat. No. 2,953,279, the assembly 10 includes a protective member made of a resilient material, which is between the first rupturable member 22 and the sealing member 24, and the sealing member 24. And the second rupturable member 26. The protective members are such that the sharp edges formed in the slits and apertures of the rupturable members 22 and 26 wear or damage the sealing member 24 during handling, installation and operation of the assembly. To block.

When the pressure of the pressurized fluid applied to assembly 10 rises relatively gradually to an overpressure condition, ie, a pressure equal to or slightly higher than the predetermined burst pressure of first rupturable member 22, The assembly 10 ruptures as described above. That is, a pressure increase from a level below the predetermined burst pressure of the rupture member 22 to a pressure slightly higher than the predetermined burst pressure is transmitted to the sealing member 24 and the first rupture member 22, and Must be slow enough to be added independently to the member. The pressurized fluid flows through a meandering path provided by the second rupturable member 26, the first flow restricting member 28, the second flow restricting member 30, and the support member 32, so that the sealing member 24 and the first The pressure increase is transmitted to the rupture member 22 of.

An instantaneous pressure build-up in the protected vessel or system causes the pressure delivered to the composite rupture disc assembly 10 to temporarily exceed the predetermined rupture pressure of its first rupture member 22. Then, the flow of the pressurized fluid flowing through the assembly 10 is restricted, and the over-pressure state is applied to the first rupture member 22 and the second rupture member 26 almost simultaneously, so that the assembly 10 does not burst. The term "instantaneous pressure surge" is the first
Pressure rise to a level higher than a predetermined burst pressure of the rupturable member 22 of claim 1, wherein the time required for the pressurized fluid to reach the first rupturable member 22 and independently apply a total pressure increase to the rupturable member. It is used here to mean a pressure build-up that lasts for a short time. Due to the tortuous path through which the flow of pressurized fluid caused by the momentary pressure surge must flow, the rupture disk assembly 10 does not burst during such momentary pressure surges. That is, the flow of the pressurized fluid to the sealing member 24 is restricted by the second rupture member 26, the first flow restriction member 28 and the second flow restriction member 30, and the relatively small opening of the support member 32. As a result, the pressure required to rupture the assembly 10 is higher than the pressure required to rupture the first rupturable member 22. During an instantaneous pressure surge, the burst pressure of the assembly 10 is almost doubled because pressure is transmitted to both rupturable members almost simultaneously.

The embodiment shown in FIGS.
Is fixed between the inlet annular support member 72 and the outlet annular support member 74. Inlet support member 72
Is connected to a tube 76, which is connected to the vessel or system to be protected. The outlet support member 74 is connected to the outlet pipe 78. In the embodiment shown in FIG. 6, the annular support members 72, 74 are pipe flanges and are joined together by a plurality of studs 80 and nuts 82, sandwiching the composite rupture disc assembly 70 therebetween. Fixed.

Similar to the assembly 10 above, the composite rupture disk assembly 70 includes an annular locating member 84, a first perforated rupture member 86, an elastic sealing member 88, and a second rupture member 90.
And However, instead of a pair of flow restriction members and a support member, the assembly 70 includes a single flow restriction member 92. The flow restricting member 92 is made of a sturdy material and includes a central dome 94 and a flat annular flange 96. The diameter of the flow restricting member 92 can be greater than the diameter of the other members of the assembly 70 so that the portion 98 can be folded over the other members to secure the assembly together. The dome portion 94 of the flow restricting member 92 is located at the center, the convex side thereof faces the pressurized fluid, and the concave side thereof has the second rupturable member 90.
Face

The first rupturable member 86 is identical to the first rupturable member 22 of the assembly 10 and has a solid portion 104 thereof.
A plurality of slits 100 are formed extending radially outwardly from and forming a plurality of sectors 106 therebetween. Optionally, an aperture 102 can be formed at the end of the slit 100 of the first rupturable member 86 as shown.

The elastic sealing member 88 of the assembly 70 and the second
The rupturable member 90 is the same as the sealing member 24 and the second rupturable member 26 of the assembly 10, respectively. The second rupturable member 90 extends radially outwardly from its solid portion 110 to form a plurality of slits 108 defining a plurality of sectors therebetween.
including.

An aperture 112 is arranged at the end of the slit 108 of the second rupturable member 90.

An opening 114 is provided at the center of the flow restricting member 92.
Is provided. The opening is in the form of a small slot in FIG.
Is shown in Further, a pair of arc-shaped slits 116 are formed in the flow restricting member 92. The slits form a hinged circular outlet area within it. That is, the area 118 between two adjacent ends of the arcuate slit 116 forms a hinge that holds the outlet connected to the flow restriction member 92. Area 120 between the other two adjacent ends of the slit 116
However, when the flow restricting member 92 ruptures, it forms a rupture tab that shreds. The end of the slit 116 can optionally include an aperture 122. Arc slit 116
Can be formed in the dome 94 of the flow restricting member 92 or in a flat annular flange 96 near the dome 94.

The operation of the composite rupture disc assembly 70 is such that the flow restriction and the delay in transmitting the fluid pressure to the first rupturable member 86 are formed within the assembly 70 by the dome shape of the flow restricting member 92. Similar to the operation of the assembly 10 described above, except that it is performed by the flow restricting openings of the flow restricting member 92 associated with the increased volume of space. That is, while the fluid pressure is rising relatively slowly, the pressurized fluid passes through the slot 114 and the slit 116 and the aperture 122 of the flow restricting member 92 and the concave side of the flow restricting member 92 and the second rupturable member 90. Flows into the space between. The pressurized fluid then flows through the slit 108 and aperture 112 of the second rupturable member 90 and into the resilient sealing member 88. When the fluid pressure applied to the sealing member 88 exceeds the burst pressure of the first rupturable member 86, the first rupturable member ruptures,
Subsequently, the sealing member 88 and the second rupturable member 90
And the flow restricting member 92 ruptures. Flow restricting member 92
Ruptures by tearing the area 120 between the apertures 122, followed by the circular outlet formed by the slit 116 moving through the opening in the assembly 70. The outlet remains connected to the flow restricting member 92 by the hinge area 118.

When experiencing an instantaneous pressure surge, which causes the pressure to rise sharply to an overpressure condition and then subsides, the pressure surge is applied to the openings in flow restricting member 92, ie, slots 114, slits. 11
6 and an aperture 122, to which the pressurized fluid receives a flow restriction member 92 and a second rupture member 90.
The extra time required to fill the volume between the two is combined. Due to flow restrictions and time delays, the pressure
The rupture does not occur because the pressure required to rupture the assembly 70 by simultaneously acting on the rupture member and the second rupture member is the sum of the rupture pressures of those rupture members.

The assembly 130 shown in FIG. 9 includes a locating member 132, a perforated breaching member 134, a resilient sealing member 136, and a flow restricting member 138. Use of the locating member 132 is optional. Flow restriction member 138
The members are secured together using the peripheral edge of. Assembly 130
Operates in the same manner as described above, except that the flow restricting member 138 functions to restrict the flow of pressurized fluid to the assembly 130 and also functions as a second rupturable member. The flow restriction member 138 includes a single flow restriction opening 139 therein. When a momentary pressure surge occurs,
Before the assembly 130 ruptures, a pressure level equal to the rupture pressure of the rupture member 134 and the rupture pressure of the flow restriction member 138 must be exceeded by restricting the pressurized fluid flowing into the assembly. If the pressure rise is relatively slow, the overpressure condition is only transmitted to the rupture member 134,
Then, the rupturable member and other members of the assembly rupture at a predetermined burst pressure of the rupturable member 134.

The composite rupture disk assembly 140 shown in FIG. 10 includes an optional locating member 142, a first perforated rupture member 144, an elastic sealing member 146, and a
And a flow restricting member 149 having at least one opening 152. The members of the assembly are secured together by separate securing members that are folded over the peripheral ends of the other members of the assembly.

The composite rupture disk assembly 140 operates in the same manner as described above. However, the first rupturable member 144
Includes a central dome. The concave side of the dome faces the sealing member 146. The dome of the first rupturable member 144 provides additional volume within the assembly 140. Therefore, a time delay in transmitting the pressure increase to only the first rupturable member 144 is increased.

The assembly 150 of FIG. 11 includes an optional locating member 152 and a first dome-shaped perforated rupturable member 15.
4, an elastic sealing member 156, a second dome-shaped perforated rupture member 158 having a hole 159, and a dome-shaped flow restricting member 160 having a hole 162. Flow restricting member 16
0 is used to secure the parts of the assembly 150 together. Domed first and second rupturable members 154, 15
The recess side of 8 faces the sealing member 156, whereby a relatively large volume of space is formed in the assembly 150.

In operation of the assembly 150, as the pressure gradually increases, the pressurized fluid flows through the single opening 162 of the flow restricting member 160 and the aperture and slit of the second rupturable member 158, and The sealing member 156 flows into the space inside the assembly 150, whereby the elastic sealing member is moved to contact the concave side of the first rupturable member 154. When the pressure transmitted to the first rupturable member 154 exceeds its predetermined rupture pressure, the assembly ruptures.
When an instantaneous pressure surge occurs, the resulting pressurized fluid is restricted and a larger volume is required to exceed the predetermined burst pressure of the first rupturable member 154 alone.

The assembly 170 of FIG. 12 includes an optional locating member 172 and a solid rupture disk 174 made of a sturdy material. The rupture disk 174 can be flat as shown, or can include a central dome with the convex side facing the locating member 172. Also, a combined rupture and flow restriction member 176 is provided. This member can be flat or include a central dome portion as shown. This dome has a rupture disk 174 on its concave side.
And the pressurized fluid flow restriction opening 17
8 inclusive.

The operation of this assembly will now be described. When the fluid pressure slowly rises to an overpressure condition, the pressurized fluid flows through the opening 178 into the space inside the assembly 170 and contacts the rupture disk 174, whereby the overpressure condition only causes the rupture disk 174. Conveyed to. As a result, the burst disk 174
Ruptures, followed by rupture of the flow restricting member 176 to relieve pressure in the protected container or system. Upon experiencing an instantaneous surge of pressure, and thereby experiencing an instantaneous overpressure condition, the resulting pressurized fluid is limited and a predetermined amount of burst disk 174 is required to rupture assembly 170. And a predetermined burst pressure of the flow restricting member 176 are obtained.

Various embodiments of the present invention that include an elastic seal may also include a protective member to prevent wear damage of the seal.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of one embodiment of the rupture disk assembly of the present invention secured between a pair of annular support members.

FIG. 2 is a top view of the rupture disk assembly shown in FIG.

FIG. 3 is a bottom view of the rupture disk assembly shown in FIG.

FIG. 4 is an exploded perspective view showing various portions of the rupture disk assembly shown in FIG.

FIG. 5 is a side cross-sectional view similar to FIG. 1 showing the rupture disk assembly after a rupture has occurred.

FIG. 6 is a side cross-sectional view of a second embodiment of the rupture disc assembly of the present invention secured between annular support members.

FIG. 7 is a top view of the rupture disk assembly shown in FIG.

FIG. 8 is a bottom view of the rupture disc assembly shown in FIG.

FIG. 9 is a side cross-sectional view of another embodiment of the rupture disk assembly of the present invention.

FIG. 10 is a side cross-sectional view of another embodiment of the rupture disk assembly of the present invention.

FIG. 11 is a side cross-sectional view of another embodiment of the rupture disk assembly of the present invention.

FIG. 12 is a side cross-sectional view of yet another embodiment of the rupture disk assembly of the present invention.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Zengang Wang, Oklahoma, United States, 74133, Tulsa, Number 2, South One Handed and Seventh East Avenue, 6124 (56) References -11977 (JP, A) JP-A-4-211773 (JP, A) JP-A-63-1873 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16K 17/00- 17/168

Claims (11)

(57) [Claims] 1. A pressure surge resistant rupturable plate assembly adapted to be hermetically secured across a pressurized fluid contained in a passageway, said first rupture member having a predetermined rupture pressure. 22, 86, 1
34, 144, 154, 174) and at least one opening (57, 114, 139,...) Having a predetermined burst pressure and facing said pressurized fluid and allowing a restricted flow of pressurized fluid. 150, 159,
178) having the second rupturable member (26, 90, 13).
8, 148, 158, 176), the assembly further comprising at least one relatively small opening (58) located on the side facing the pressurized fluid in the second rupturable member. , 60, 62, 114, 15
2, 162) and at least one flow restricting member (28, 30, 92, 14) for further restricting the flow of pressurized fluid through the opening and the opening of the second rupturable member.
9, 160) wherein when the pressure of the pressurized fluid slowly rises to an overpressure condition, the overpressure condition passes through at least one relatively small opening in the at least one flow restriction member. Transmitted to the first rupturable member, but when the overpressure condition is due to an instantaneous surge, the flow of the pressurized fluid through at least one relatively small opening in the flow restricting member is restricted. As a result, transmission of the overpressure state to the first rupturable member is prevented. 2. There are two flow restrictors having openings at different locations to provide a tortuous path for the flow of the pressurized fluid, the flow being further restricted during a pressure surge. The assembly of claim 1, wherein 3. The first rupturable member has a hole, and the rupturable plate assembly includes an elastic sealing member (24, 8) located between the first rupturable member and the second rupturable member.
The assembly according to claim 1 or 2, further comprising (8, 136, 146, 156). 4. The method of claim 1, wherein said second rupturable member has a predetermined rupture pressure substantially equal to or lower than a predetermined rupture pressure of said first rupture member. An assembly according to any one of the preceding claims. 5. The second rupturable member has a central portion (5
4, 104) and a plurality of slits (5) formed radially outward to define a plurality of sectors (56, 106).
5. The method according to claim 1, wherein when the rupture occurs, the slit is opened without breaking apart due to tearing between the inner ends of the slit. An assembly as described. 6. The assembly according to claim 5, wherein said second rupturable member includes an aperture (57, 102) formed at an inner end of said slit. 7. The assembly according to claim 6, wherein said aperture and said slit in said second rupturable member are relatively small. 8. A central portion (68) of the second rupturable member opposite the sealing member and facing the pressurized fluid and a peripheral edge of the first and second rupturable members. An assembly according to claim 3, further comprising a perforated support member (32) having an outer peripheral portion (64) that is bent to secure the members together. 9. The rupturable member of claim 1, wherein the first rupturable member includes a dome portion having a convex side and a concave side, and the concave side of the dome portion faces the sealing member. An assembly according to claim 1. 10. The rupturable member of claim 2, wherein the second rupturable member includes a dome portion having a convex side and a concave side, and the concave side of the dome portion faces the sealing member. An assembly according to claim 1. 11. When the pressure of the fluid slowly rises to an over-pressure state, the over-pressure of the container or system containing the pressurized fluid is released, but when the over-pressure state is instantaneously reached as a result of the pressure surge. 11. A method for preventing overpressure from leaking, said method comprising: sealingly installing a pressure surge resistance rupturable plate assembly according to any one of claims 1 to 10 in a pressure relief passage connected to the container or the system. When the pressure of the pressurized fluid slowly rises to an overpressure condition, the overpressure condition passes through a relatively small opening in the at least one flow restriction member and the first rupture member And the first rupturable member ruptures to relieve overpressure, but when the overpressure condition is due to an instantaneous surge, the relative pressure in the at least one flow restricting member is reduced. Result of the flow of pressurized fluid through the the opening is restricted, the impeded transfer to the first rupturable member of overpressure, wherein the rupture does not occur.