CA2654947A1 - High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same - Google Patents
High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same Download PDFInfo
- Publication number
- CA2654947A1 CA2654947A1 CA002654947A CA2654947A CA2654947A1 CA 2654947 A1 CA2654947 A1 CA 2654947A1 CA 002654947 A CA002654947 A CA 002654947A CA 2654947 A CA2654947 A CA 2654947A CA 2654947 A1 CA2654947 A1 CA 2654947A1
- Authority
- CA
- Canada
- Prior art keywords
- annular
- metal ring
- ring gasket
- sloped
- threaded union
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract 73
- 230000013011 mating Effects 0.000 claims abstract 32
- 239000012530 fluid Substances 0.000 claims abstract 10
- 230000000295 complement effect Effects 0.000 claims 7
- 238000010276 construction Methods 0.000 claims 1
Classifications
-
- 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
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/06—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between the end surfaces of the pipes or flanges or arranged in recesses in the pipe ends or flanges
- F16L17/08—Metal sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Joints With Pressure Members (AREA)
Abstract
A metal ring gasket provides a high-pressure temperature tolerant metal-to-metal seal between subcomponents of a threaded union. The metal ring gasket is received in an annular cavity formed between mating surfaces of the subcomponents of the threaded union. The metal ring gasket is capable of maintaining a fluid seal even at very high temperatures resulting from direct exposure to fire. At high fluid pressures the metal ring gasket is energized because hoop stress induced by the fluid pressure forces the metal ring gasket into tighter contact with the subcomponents of the threaded union.
Claims (32)
1. A threaded union for providing a fluid-tight, metal-to-metal seal in a fluid conduit, the threaded union comprising:
first and second subcomponents having respective mating ends that are interconnected by a single nut, the mating end of the first subcomponent including a first annular groove that mates with a complementary second annular groove in the mating end of the second subcomponent, said complementary first and second annular grooves respectively having a sloped annular inner face that is convergent to a respective planar annular bottom surface of the respective annular grooves; and a metal ring gasket having a central axis received in the respective annular grooves, the metal ring gasket having a single planar top face, a single planar bottom face that is parallel to the planar top face, a cylindrical outer face that is coaxial with the central axis of the metal ring gasket and that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top face and bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is elastically deformed, without plastic deformation, by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
first and second subcomponents having respective mating ends that are interconnected by a single nut, the mating end of the first subcomponent including a first annular groove that mates with a complementary second annular groove in the mating end of the second subcomponent, said complementary first and second annular grooves respectively having a sloped annular inner face that is convergent to a respective planar annular bottom surface of the respective annular grooves; and a metal ring gasket having a central axis received in the respective annular grooves, the metal ring gasket having a single planar top face, a single planar bottom face that is parallel to the planar top face, a cylindrical outer face that is coaxial with the central axis of the metal ring gasket and that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top face and bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is elastically deformed, without plastic deformation, by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
2. The threaded union as claimed in claim 1 wherein the metal ring gasket is oversized by about 0.003"
with respect to the respective sloped annular outer faces of the respective annular grooves.
with respect to the respective sloped annular outer faces of the respective annular grooves.
3. The threaded union as claimed in claims 1 or 2 further comprising a gap of at least 0.003"
between an inner side of the metal ring gasket and the respective sloped annular inner faces of the respective annular grooves after the mating ends of the first and second subcomponents are drawn into contact by the single nut.
between an inner side of the metal ring gasket and the respective sloped annular inner faces of the respective annular grooves after the mating ends of the first and second subcomponents are drawn into contact by the single nut.
4. The threaded union as claimed in any one of claims 1-3 wherein the single nut is constructed in three parts so that a main body of the nut is a single piece construction.
5. The threaded union as claimed in claim 4 wherein the single nut has an upper annular shoulder that extends radially inwardly from a top of the main body of the single nut, the upper annular shoulder abuts a flange that extends radially outwardly from an adapter collar that is an annular multi-piece body having an inner diameter dimensioned to encircle an outer surface of the second subcomponent and rest on an annular shoulder of the second subcomponent, and when treads of the single nut engage threads on an end of the first subcomponent and rotational torque is applied to the single nut, the upper annular shoulder is forced downwardly on the flange which in turn exerts a downward force on the upper annular shoulder, thereby urging the mating end of the second subcomponent against the mating end of the first subcomponent to elastically deform the metal ring gasket into the respective annular grooves.
6. The threaded union as claimed in any one of claims 1-5 wherein the mating end of the first subcomponent comprises a pin end received in a socket of the mating end of the second subcomponent, the annular groove in the first mating end is located on the pin end and the annular groove in the second mating end is located in a bottom of the socket.
7. A threaded union for providing a fluid-tight, metal-to-metal seal in a fluid conduit, the threaded union comprising, in combination:
first and second subcomponents having respective mating ends that are interconnected by a single nut, each of the respective mating ends including an annular groove having a sloped annular inner face that is convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket having a central axis received in the annular grooves, the metal ring gasket comprising a single planar top face, a single planar bottom face that is parallel to the planar top face, a cylindrical outer face that is coaxial with the central axis of the metal ring gasket and that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top and bottom faces and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is elastically deformed, without plastic deformation, by contact between the annular converging sloped surfaces of the metal ring gasket and the respective first and second sloped annular outer faces of the respective first and second annular grooves when the first and second subcomponents are drawn together by the nut, and gaps remain between the metal ring gasket and each of: inner faces and said respective planar bottom faces of the respective annular grooves after the first and second subcomponents are drawn together by the single nut.
first and second subcomponents having respective mating ends that are interconnected by a single nut, each of the respective mating ends including an annular groove having a sloped annular inner face that is convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket having a central axis received in the annular grooves, the metal ring gasket comprising a single planar top face, a single planar bottom face that is parallel to the planar top face, a cylindrical outer face that is coaxial with the central axis of the metal ring gasket and that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top and bottom faces and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is elastically deformed, without plastic deformation, by contact between the annular converging sloped surfaces of the metal ring gasket and the respective first and second sloped annular outer faces of the respective first and second annular grooves when the first and second subcomponents are drawn together by the nut, and gaps remain between the metal ring gasket and each of: inner faces and said respective planar bottom faces of the respective annular grooves after the first and second subcomponents are drawn together by the single nut.
8. The threaded union as claimed in claim 7 wherein the metal ring gasket is oversized by about 0.003"
with respect to the sloped annular outer faces of the respective annular grooves.
with respect to the sloped annular outer faces of the respective annular grooves.
9. The threaded union as claimed in claims 7 or 8 wherein the metal ring gasket is octagonal in cross-section.
10. The threaded union as claimed in any one of claims 7-9 wherein the annular converging sloped surfaces of the metal ring gasket are sloped at an angle of about 23° with respect to the cylindrical outer face.
11. The threaded union as claimed in any one of claims 7-10 wherein the mating end of the first subcomponent comprises a pin end received in a socket of the mating end of the second subcomponent, the annular groove in the first mating end is located on the pin end and the annular groove in the second mating end is located in a bottom of the socket.
12. A threaded union for providing a fluid-tight, metal-to-metal seal between first and second subcomponents of a fluid conduit, the first and second subcomponents having respective mating ends that are interconnected by a single nut, the threaded union comprising:
A first annular groove in the mating end of the first subcomponent that mates with a complementary second annular groove in the mating end of the second subcomponent, said complementary first and second annular grooves respectively having sloped annular outer faces that are respectively convergent to a planar annular bottom surface of the respective first and second annular grooves;
and a metal ring gasket having a central axis received in the respective annular grooves, the metal ring gasket having a single planar top face, a single planar bottom face that is parallel to the single planar top face, a cylindrical outer face that is coaxial with the central axis of the metal ring gasket and is perpendicular to the single planar top and bottom faces, and single annular converging sloped surfaces between each of the single planar top face, the single planar bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is elastically deformed, without plastic deformation, by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents,are drawn together by the nut.
A first annular groove in the mating end of the first subcomponent that mates with a complementary second annular groove in the mating end of the second subcomponent, said complementary first and second annular grooves respectively having sloped annular outer faces that are respectively convergent to a planar annular bottom surface of the respective first and second annular grooves;
and a metal ring gasket having a central axis received in the respective annular grooves, the metal ring gasket having a single planar top face, a single planar bottom face that is parallel to the single planar top face, a cylindrical outer face that is coaxial with the central axis of the metal ring gasket and is perpendicular to the single planar top and bottom faces, and single annular converging sloped surfaces between each of the single planar top face, the single planar bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is elastically deformed, without plastic deformation, by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents,are drawn together by the nut.
13. The threaded union as claimed in claim 12 wherein the metal ring gasket is compressed by about 0.003"
by the contact between only the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket.
by the contact between only the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket.
14. The threaded union as claimed in claims 12 or 13 wherein the metal ring gasket is octagonal in cross-section.
15. The threaded union as claimed in claims 12 or 13 wherein the metal ring gasket is hexagonal in cross-section.
16. The threaded union as claimed in any one of claims 15 wherein the metal ring gasket has a cylindrical inner face that is coaxial with the central axis of the metal ring gasket.
17. A threaded union for providing a fluid-tight, metal-to-metal seal in a fluid conduit, the threaded union comprising:
first and second subcomponents having respective mating ends that are drawn into contact by a single nut, the respective mating ends including respective complementary annular grooves having a sloped annular inner face that is convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket received in the respective annular grooves, the metal ring gasket having single planar top and bottom faces, a cylindrical outer face that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top face and bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the respective annular grooves to an extent that the metal ring gasket is only elastically deformed by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
first and second subcomponents having respective mating ends that are drawn into contact by a single nut, the respective mating ends including respective complementary annular grooves having a sloped annular inner face that is convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket received in the respective annular grooves, the metal ring gasket having single planar top and bottom faces, a cylindrical outer face that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top face and bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the respective annular grooves to an extent that the metal ring gasket is only elastically deformed by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
18. The threaded union as claimed in claim 17 wherein the metal ring gasket is oversized by about 0.003"
with respect to the respective sloped annular outer faces of the respective annular grooves.
with respect to the respective sloped annular outer faces of the respective annular grooves.
19. The threaded union as claimed in claims 17 or 18 further comprising a gap of at least 0.003"
between an inner side of the metal ring gasket and inner faces of the respective annular grooves after the mating ends of the first and second subcomponents are drawn into contact by the nut.
between an inner side of the metal ring gasket and inner faces of the respective annular grooves after the mating ends of the first and second subcomponents are drawn into contact by the nut.
20. The threaded union as claimed in claim 1 wherein the single nut is constructed in three parts so that a main body of the single nut is a single piece.
21. The threaded union as claimed in claim 4 wherein the single nut has an upper annular shoulder that extends radially inwardly from a top of the main body of the single nut, the upper annular shoulder abuts a flange that extends radially outwardly from an adapter collar that is a generally annular multi-piece body having an inner diameter dimensioned to encircle an outer surface of the second subcomponent and rest on an annular shoulder of the second subcomponent, so that when torque is applied to the single nut the upper annular shoulder is forced downwardly on the flange which in turn exerts a downward force on the annular shoulder, thereby forcing the mating end of the second subcomponent against the mating end of the first subcomponent to elastically deform the metal ring gasket into the respective annular grooves.
22. A threaded union for providing a fluid-tight, metal-to-metal seal in a fluid conduit, the threaded union comprising, in combination:
first and second subcomponents having respective mating ends that are drawn into contact by a single nut, each of the respective mating ends including an annular groove having a a sloped annular outer face that is convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket having received in the annular grooves, the metal ring gasket comprising a planar top face, a planar bottom face that is parallel to the planar top face, a cylindrical outer face that is perpendicular to the top and bottom faces, and an annular converging sloped surface between each of the planar top and bottom faces and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves such that the metal ring gasket is elastically deformed by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the nut.
first and second subcomponents having respective mating ends that are drawn into contact by a single nut, each of the respective mating ends including an annular groove having a a sloped annular outer face that is convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket having received in the annular grooves, the metal ring gasket comprising a planar top face, a planar bottom face that is parallel to the planar top face, a cylindrical outer face that is perpendicular to the top and bottom faces, and an annular converging sloped surface between each of the planar top and bottom faces and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves such that the metal ring gasket is elastically deformed by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the nut.
23. The threaded union as claimed in claim 22 wherein the metal ring gasket is oversized by about 0.003"
with respect to the sloped annular outer faces of the respective annular grooves.
with respect to the sloped annular outer faces of the respective annular grooves.
24. The threaded union as claimed in claims 22 or 23 wherein the metal ring gasket is octagonal in cross-section.
25. The threaded union as claimed in claims 22 or 23 wherein the metal ring gasket is octagonal in cross-section.
26. The threaded union as claimed in any one of claims 22-25 wherein the annular converging sloped surfaces between each of the planar top and bottom faces and the cylindrical outer face of the metal ring gasket are sloped at an angle of about 23°
with respect to the cylindrical outer face.
with respect to the cylindrical outer face.
27. The threaded union as claimed in any one of claims 22-26 wherein the mating end of the first subcomponent comprises a pin end received in a socket of the mating end of the second subcomponent, the annular groove in the first mating end is located in the pin end and the annular groove in the second mating end is located in a bottom of the socket.
28. A threaded union for providing a fluid-tight, metal-to-metal seal in a fluid conduit having at least first and second subcomponents connected together by a single nut, the threaded union comprising:
a complementary annular groove in respective mating ends of first and second subcomponents of the fluid conduit, said complementary first and second annular grooves respectively having sloped annular outer faces that are respectively convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket received in the respective annular grooves, the metal ring gasket having a planar top face, a planar bottom face that is parallel to the planar top face, a cylindrical outer face that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top face, the planar bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is only elastically deformed by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
a complementary annular groove in respective mating ends of first and second subcomponents of the fluid conduit, said complementary first and second annular grooves respectively having sloped annular outer faces that are respectively convergent to a planar annular bottom surface of the respective annular grooves; and a metal ring gasket received in the respective annular grooves, the metal ring gasket having a planar top face, a planar bottom face that is parallel to the planar top face, a cylindrical outer face that is perpendicular to the top and bottom faces, and single annular converging sloped surfaces between each of the planar top face, the planar bottom face and the cylindrical outer face, the metal ring gasket being oversized with respect to the first and second sloped outer faces of the annular grooves to an extent that the metal ring gasket is only elastically deformed by contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
29. The threaded union as claimed in claim 28 wherein the metal ring gasket is elastically compressed by about 0.003" by the contact between the respective first and second sloped annular outer faces of the respective first and second annular grooves and the annular converging sloped surfaces of the metal ring gasket when the first and second subcomponents are drawn together by the single nut.
30. The threaded union as claimed in claims 28 or 29 wherein the metal ring gasket is octagonal in cross-section.
31. The threaded union as claimed in claims 28 or 29 wherein the metal ring gasket is hexagonal in cross-section.
32. The threaded union as claimed in claim 31 wherein the metal ring gasket has a cylindrical inner face that is perpendicular to the respective planar top and bottom faces of the metal ring gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2654947A CA2654947C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2654947A CA2654947C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
| CA002512128A CA2512128C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002512128A Division CA2512128C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2654947A1 true CA2654947A1 (en) | 2007-01-14 |
| CA2654947C CA2654947C (en) | 2011-03-29 |
Family
ID=37663404
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2654947A Active CA2654947C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
| CA002512128A Active CA2512128C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002512128A Active CA2512128C (en) | 2005-07-14 | 2005-07-14 | High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2654947C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417580A (en) * | 2021-06-23 | 2021-09-21 | 四川宏华石油设备有限公司 | Manifold device and manifold system adopting same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013773A (en) * | 2017-05-10 | 2017-08-04 | 宁波天生密封件有限公司 | Sealing and connecting device |
-
2005
- 2005-07-14 CA CA2654947A patent/CA2654947C/en active Active
- 2005-07-14 CA CA002512128A patent/CA2512128C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417580A (en) * | 2021-06-23 | 2021-09-21 | 四川宏华石油设备有限公司 | Manifold device and manifold system adopting same |
| CN113417580B (en) * | 2021-06-23 | 2024-04-09 | 四川宏华石油设备有限公司 | Manifold device and manifold system adopting same |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2512128A1 (en) | 2007-01-14 |
| CA2512128C (en) | 2009-02-10 |
| CA2654947C (en) | 2011-03-29 |
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|---|---|---|---|
| EEER | Examination request |