CN112780877A - B-type sleeve for repairing circumferential weld defects between three-way branch pipe and butted steel pipe and installation method thereof - Google Patents
B-type sleeve for repairing circumferential weld defects between three-way branch pipe and butted steel pipe and installation method thereof Download PDFInfo
- Publication number
- CN112780877A CN112780877A CN202110077662.9A CN202110077662A CN112780877A CN 112780877 A CN112780877 A CN 112780877A CN 202110077662 A CN202110077662 A CN 202110077662A CN 112780877 A CN112780877 A CN 112780877A
- Authority
- CN
- China
- Prior art keywords
- pipe
- branch pipe
- weld
- boss
- repairing
- 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
Images
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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a B-type sleeve for repairing the girth weld defect between a three-way branch pipe and a butt-jointed steel pipe and an installation method thereof, wherein the sleeve is used for being sleeved outside a first girth weld and comprises a large-size boss and an improved reducing pipe, and can finish in-service repair and reinforcement of the girth weld defect between the three-way branch pipe and the butt-jointed steel pipe under the condition that an oil-gas conveying medium in a three-way pipeline is not conveyed continuously.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of repairing of oil and gas transmission pipelines, and particularly relates to a B-type sleeve for repairing the defect of a circumferential weld between a three-way branch pipe and a butt-jointed steel pipe and an installation method thereof.
[ background of the invention ]
The in-service pipeline repair technology and the pipe replacement technology of the B-type sleeve are major permanent repair modes of defects of the oil and gas conveying pipeline acknowledged in the industry, wherein the B-type sleeve is widely applied to the field of repair and reinforcement of the oil and gas conveying pipeline by the characteristic of in-service non-stop repair. However, the main body of the existing B-type sleeve repair is mainly a steel pipe with a simple geometric structure and a butt-joint circumferential weld, and the technical problem exists in-service repair reinforcement research and application of pressure equipment with a complex geometric structure.
The hot extrusion tee joint is an indispensable medium distribution transmission structural member in a long transmission pipeline, is very common in a trunk line, a valve chamber and a station yard, but has a complex structure, the length of a tee branch pipe is limited by various factors such as material molding deformation capacity, cross-section structure stress control, production technology and the like, the effective length is short, a certain reducing diameter is provided, when a circumferential weld between the tee branch pipe and a connected steel pipe in an operation pipeline system has defects, the circumferential weld between the tee branch pipe and the connected steel pipe is not suitable for being directly installed, welded and repaired through a sleeve because of the three-way structure stress control requirement on one hand and the limitation of factors such as the geometric shape, the length and the like of the tee branch pipe section on the other hand, once the quality problem of the circumferential weld between the tee branch pipe and the connected steel pipe in the in-service pipeline system is found, only the pipeline can be stopped, the pipe replacement operation is directly carried, and the negative influence on the local natural environment and the normal gas consumption of downstream users caused by active exhaust in the pipe is inevitable.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides a B-type sleeve for repairing the girth weld defects between a three-way branch pipe and a butt-jointed steel pipe and an installation method thereof, so as to solve the problem that the direct in-service repair of a reinforced girth weld is difficult in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a B-shaped sleeve for repairing the girth weld defects between a three-way branch pipe and a butted steel pipe comprises a main pipe and a branch pipe which are integrally connected, wherein the axis of the main pipe is vertical to the axis of the branch pipe; the branch pipe of the tee joint is connected with the branch pipe butt joint steel pipe through a first girth weld; the B-shaped sleeve is sleeved outside the first girth weld;
the B-shaped sleeve comprises a boss and a reducing pipe;
the lower end of the boss is connected with the main pipe through a first annular fillet weld;
the reducing pipe comprises a straight pipe section and a reducing pipe section which are integrally connected, the straight pipe section is arranged above the reducing pipe section, and the upper end of the straight pipe section is connected with the branch pipe through a second annular fillet weld;
the bottom end of the special pipe section is connected with the upper end of the boss through a circumferential butt welding seam.
The invention is further improved in that:
preferably, the cross-sectional area of the upper end is smaller than the cross-sectional area of the lower end.
Preferably, the upper end is circular ring-shaped, and the lower end is formed by connecting four arcs end to end.
Preferably, the boss is divided into two symmetrical parts, the two symmetrical parts are symmetrical relative to the second symmetrical plane, and the two symmetrical parts are welded and connected through the first longitudinal welding seam.
Preferably, the straight pipe section is in the shape of an annular circular pipe.
Preferably, the different pipe section is in the shape of an annular truncated cone, and the cross-sectional area of the top end of the different pipe section is smaller than that of the bottom end of the different pipe section.
Preferably, the different pipe section is divided into two symmetrical parts, the two symmetrical parts are symmetrical relative to the second symmetrical plane, and the two symmetrical parts are welded and connected through a second longitudinal welding seam.
The installation method of the B-shaped sleeve for repairing the girth weld defects between the three-way branch pipe and the butted steel pipe comprises the following steps:
and 3, welding the top end of the reducing pipe and the outer wall of the branch pipe to form a second annular fillet weld.
Preferably, in the step, the boss is divided into two symmetrical parts, the two parts are sleeved on the three-way pipe fitting from two sides of the three-way pipe fitting, and then the two parts are welded to form a first longitudinal welding seam.
Preferably, in the step 2, the different pipe section is divided into two symmetrical parts, the two symmetrical parts wrap the branch pipe from two sides of the branch pipe, and then the two parts are welded to form a second longitudinal welding seam.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a B-shaped sleeve for repairing the girth weld defect between a three-way branch pipe and a butt-jointed steel pipe, which is sleeved outside a first girth weld and comprises a large-size boss and an improved reducing pipe, so that the in-service repair and reinforcement of the girth weld defect between the three-way branch pipe and the butt-jointed steel pipe can be completed under the condition that an oil and gas conveying medium in a three-way pipeline is not conveyed continuously.
The invention also discloses a method for installing the B-shaped sleeve for repairing the girth weld defects between the three-way branch pipe and the butted steel pipe, the boss and the reducing pipe are arranged outside the girth weld, so that the whole installation process is easy to operate.
[ description of the drawings ]
FIG. 1 is a schematic view of a butt welding structure of a tee pipe fitting and a connecting steel pipe;
FIG. 2 is a schematic view of the welding reinforcement of the boss 4;
fig. 3 is a schematic view of the welding of the reducing pipe 7.
Wherein: 1-a tee pipe fitting; 2-butt-jointing the branch pipes with the steel pipes; 3-a first girth weld; 4-boss 4; 5-a first longitudinal weld; 6-a first annular fillet weld; 7-reducing pipe; 8-a second longitudinal weld; 9-circumferential butt welding; 10-second annular fillet weld; 11-branch pipe; 12-a main tube; 13-shoulder; 14-upper end; 15-lower end; 16-a first arc; 17-a second arc; 18-a straight tube section; 19-iso-pipe section; 20-top end; 21-bottom end.
[ detailed description ] embodiments
The invention is described in further detail below with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the sleeve repair configuration includes a large gauge boss 4 and a modified reducer 7. The three-way pipe fitting 1 comprises a main pipe 12 and a branch pipe 11, wherein the axes of the main pipe 12 and the branch pipe 11 are perpendicular to each other, the plane where the axis of the main pipe 12 and the axis of the branch pipe 11 are located is set to be a first symmetrical surface, and the plane which is perpendicular to the axis of the main pipe 12 and passes through the axis of the branch pipe 11 is set to be a second symmetrical surface.
More preferably, in order to ensure that the boss 4 is easy to mount, along the second plane of symmetry, the boss 4 is divided into two symmetrical parts, which are welded together by a first longitudinal weld 5.
The reducing pipe 7 comprises a straight pipe section 18 and a reducing pipe section 19, and the straight pipe section 18 is arranged above the reducing pipe section 19; the straight pipe section 18 is in an annular round pipe shape, and the inner diameter of the straight pipe section is the sum of the outer diameter of the branch pipe butt joint steel pipe 2 and a fit clearance (0-5 mm); the outer pipe section 19 is an annular truncated cone having a top end 20 with a smaller cross-sectional area than a bottom end 21. The top end 20 and the lower end of the straight tube section 18 are of the same size and are integrally connected, and the bottom end 21 and the upper end 14 of the boss 4 are of the same size and are welded by a circumferential butt weld 9.
The upper part of the straight pipe section 18 and the branch pipe 11 are connected by a second annular fillet weld 10, and the lower end 15 of the boss 4 and the outer pipe wall of the main pipe 12 are connected by a first annular fillet weld 6.
The method comprises the following steps: and (5) processing and mounting the reinforcing boss 4.
Processing of the boss 4: processing a reinforcing boss 4 according to the caliber of the branch pipe 11 and the bending curvature of the shoulder 13, as shown in fig. 2, enabling the large end of the boss 4 to be tightly attached to the three-way pipe body, enabling the small end of the boss 4 to be suitable for butt welding of the large end of the reducing pipe 7, processing a welding groove along the position of the first longitudinal welding line 5, and manufacturing two boss 4 reinforcing parts which are symmetrical left and right.
Installation of the boss 4: installing the boss 4 according to a boss 4 welding schematic diagram shown in figure 2, firstly welding a first longitudinal welding line 5, installing a 2.5mm thick carbon steel base plate (the carbon content of the base plate is less than or equal to 0.23%) at the root of the first longitudinal welding line 5 of the longitudinal welding line, and preventing direct welding on the three-way pipe body; and then, welding a first annular fillet weld 6, and completing fillet weld lap welding of the boss 4 and the three-way pipe body to realize the installation of the boss 4, which is beneficial to the reinforcement of the shoulder part of the three-way pipe and the installation of the subsequent reducing pipe 7.
Step two: and (5) processing and installing the reducing pipe 7.
Processing the reducing pipe 7: the outer diameter of the large end of the reducing pipe 7 corresponds to the small end of the boss 4, the inner diameter of the small end of the reducing pipe 7 corresponds to the outer diameter of the steel pipe connected with the circular weld of the branch pipe, the length of the reducing pipe 7 is larger than the length from the boss 4 to the end part of the branch pipe, and the length of the lengthened straight pipe section is larger than or equal to 50 mm. Welding grooves are processed along the positions of the second longitudinal welding seams 8 shown in fig. 3, and two reinforcing parts of the reducing pipes 7 which are symmetrical left and right are manufactured.
Installation of the reducing pipe 7: installing the reducing pipe 7 according to the welding schematic diagram of the reducing pipe 7 shown in the figure 3, firstly welding a second longitudinal welding seam 8, and installing a carbon steel base plate with the thickness of 2.5mm (the carbon content of the base plate is less than or equal to 0.23%) at the root part of the longitudinal welding seam of the second longitudinal welding seam 8 to prevent direct welding on the pipe body of the steel pipe; then, welding a circumferential butt-joint welding seam 9, installing a carbon steel base plate with the thickness of 2.5mm at the root of the welding seam (the carbon content of the base plate is less than or equal to 0.23 percent), and finishing the butt-joint welding of the reducing pipe 7 and the boss 4; and finally, welding a second annular fillet weld 10 to complete fillet weld lap welding of the reducing pipe 7 and the steel pipe, so that the whole sleeve structural member is welded and sealed.
Examples
A hot drawing tee joint of D1016X 508mm 28mm X80 with a design pressure of 10MPa is taken as an example for explanation. The branch pipe connecting steel pipe of the tee is phi 508 multiplied by 18.4mm multiplied by 60 steel pipe. The repairing and reinforcing sleeve is selected to be the reducing pipe 7 with the thickness of 28mm and the strength level of X80 for repairing and reinforcing, and the minimum wall thickness requirement of the boss 4 and the reducing pipe 7 is 28 mm; the inner wall of the small end of the reducing pipe 7 is tightly attached to the branch pipe to be connected with the steel pipe, and the inner diameter is controlled to be 508 mm; the large end of the reducing pipe 7 is in butt welding with the small end of the boss 4, and the outer diameter can be selected to be 610 mm; the big end of the boss 4 can be tightly attached to the three-way pipe body.
The installation and welding sequence is as shown in fig. 2 and fig. 3, and the welding of 5-longitudinal welding seams, a first annular fillet weld 6, a second longitudinal welding seam 8, a circumferential butt weld 9 and a second annular fillet weld 10 is completed in sequence, wherein the butt gap between the second longitudinal welding seam 8 and the circumferential butt weld 9 is controlled to be 2-6mm, a 2.5mm thick carbon steel base plate (the carbon content of the base plate is less than or equal to 0.23%) is installed at a welding root, and the circumferential fillet weld is fillet weld lap welding of a sleeve and a pipe body, and the heat input amount needs to be controlled to ensure the repair welding quality and the operation safety in service.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A B-shaped sleeve for repairing the defect of a girth weld between a three-way branch pipe and a butted steel pipe is characterized in that the three-way pipe (1) comprises a main pipe (12) and a branch pipe (11) which are integrally connected, and the axis of the main pipe (12) is vertical to the axis of the branch pipe (11); the branch pipe (11) of the tee joint is connected with the branch pipe butt joint steel pipe (2) through a first girth weld (3); the B-shaped sleeve is sleeved outside the first girth weld (3);
the B-shaped sleeve comprises a boss (4) and a reducing pipe (7);
the lower end (15) of the boss (4) is connected with the main pipe (12) through a first annular fillet weld (6);
the reducing pipe (7) comprises a straight pipe section (18) and a different pipe section (19) which are integrally connected, the straight pipe section (18) is arranged above the different pipe section (19), and the upper end of the straight pipe section (18) is connected with the branch pipe (11) through a second annular fillet weld (10);
the bottom end (21) of the special pipe section (19) is connected with the upper end (14) of the boss (4) through a circumferential butt welding seam (9).
2. The B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipes as claimed in claim 1, wherein the sectional area of the upper end (14) is smaller than that of the lower end (15).
3. The B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipe according to claim 1, wherein the upper end (14) is annular, and the lower end (15) is formed by connecting four arcs end to end.
4. The B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipe according to the claim 1, wherein the boss (4) is divided into two symmetrical parts, the two symmetrical parts are symmetrical relative to the second symmetrical plane, and the two symmetrical parts are welded and connected through the first longitudinal weld (5).
5. The B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipe according to claim 1, wherein the straight pipe section (18) is annular and tubular.
6. The B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipe according to claim 1, wherein the special pipe section (19) is in an annular truncated cone shape, and the cross sectional area of the top end (20) of the special pipe section (19) is smaller than that of the bottom end (21).
7. The B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipes as claimed in claim 1, wherein the special pipe section (19) is divided into two symmetrical parts, the two symmetrical parts are symmetrical relative to a second symmetrical plane, and the two symmetrical parts are welded and connected through a second longitudinal weld (8).
8. The method for installing the B-shaped sleeve for repairing the girth weld defect between the three-way branch pipe and the butted steel pipe according to claim 1, which is characterized by comprising the following steps of:
step 1, sleeving a boss (4) outside a three-way pipe fitting (1), and welding the lower end (15) of the boss (4) and a main pipe (12) to form a first annular fillet weld (6);
step 2, sleeving the reducing pipe (7) outside the branch pipe (11), and welding the upper end (14) of the boss (4) and the bottom end (21) of the reducing pipe (7) to form a circumferential butt weld (9);
and 3, welding the top end (20) of the reducing pipe (7) and the outer wall of the branch pipe (11) to form a second annular fillet weld (10).
9. The mounting method according to claim 8, wherein in step (1), the boss (4) is divided into two symmetrical parts, the two parts are sleeved on the tee (1) from two sides of the tee (1), and then the two parts are welded to form the first longitudinal weld (5).
10. The installation method according to claim 8, characterized in that in step 2, the different pipe section (19) is divided into two symmetrical parts, the two symmetrical parts are wrapped around the branch pipe (11) from both sides of the branch pipe (11), and then the two parts are welded to form the second longitudinal weld (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077662.9A CN112780877B (en) | 2021-01-20 | 2021-01-20 | B-type sleeve for repairing girth weld defects between three-way branch pipe and butt-joint steel pipe and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077662.9A CN112780877B (en) | 2021-01-20 | 2021-01-20 | B-type sleeve for repairing girth weld defects between three-way branch pipe and butt-joint steel pipe and mounting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112780877A true CN112780877A (en) | 2021-05-11 |
| CN112780877B CN112780877B (en) | 2023-04-25 |
Family
ID=75757990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110077662.9A Active CN112780877B (en) | 2021-01-20 | 2021-01-20 | B-type sleeve for repairing girth weld defects between three-way branch pipe and butt-joint steel pipe and mounting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112780877B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163289Y (en) * | 1993-07-02 | 1994-04-27 | 张卓然 | Split saddle reinforced board |
| CN1089710A (en) * | 1992-12-07 | 1994-07-20 | 伊纳·爱克维西森公司 | The bushing pipe of arm adds the method for bushing pipe and used device in arm |
| US20050241713A1 (en) * | 2004-04-28 | 2005-11-03 | Shonan Gosei-Jushi Seisakusho K.K. | Method for rehabilitating an existing pipe |
| CN101725792A (en) * | 2009-12-10 | 2010-06-09 | 衡阳华菱连轧管有限公司 | Leaking stoppage method and device with pressure for pipeline |
| CN101981364A (en) * | 2007-03-02 | 2011-02-23 | 国一Inntot株式会社 | Connector for branch pipe |
| CN201795209U (en) * | 2010-08-25 | 2011-04-13 | 郑州万达管件制造有限公司 | Reinforcing three-way valve |
| CN102926466A (en) * | 2012-11-09 | 2013-02-13 | 中国矿业大学 | Method for enhancing warp angle of ring mouth flitch of steel pipe node |
| WO2015171009A1 (en) * | 2014-01-21 | 2015-11-12 | Vlad Marian Gabriel | Procedure and flexible piping made from heat shrink materials for capturing fluid leaks from damaged pipes |
| CA2892262A1 (en) * | 2014-12-11 | 2016-06-11 | Katch Kan Holdings Ltd. | Flange joint containment device |
| CN106238970A (en) * | 2016-08-11 | 2016-12-21 | 中国石油天然气集团公司 | A kind of boss angle welding composite repair reinforcement |
| WO2017004671A1 (en) * | 2015-07-03 | 2017-01-12 | Vinidex Pty Limited | A pipe tee for pressure pipe |
| CN207740609U (en) * | 2018-01-10 | 2018-08-17 | 济南市市政工程设计研究院（集团）有限责任公司 | A kind of direct burial threeway reinforcing heat distribution pipeline |
| US20190323644A1 (en) * | 2018-01-25 | 2019-10-24 | Picote Solutions Oy Ltd. | Installation device |
| CN211661447U (en) * | 2019-11-22 | 2020-10-13 | 中国石油天然气集团有限公司 | Steel pipeline circumferential weld scarf joint defect repair reinforcement sleeve |
-
2021
- 2021-01-20 CN CN202110077662.9A patent/CN112780877B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089710A (en) * | 1992-12-07 | 1994-07-20 | 伊纳·爱克维西森公司 | The bushing pipe of arm adds the method for bushing pipe and used device in arm |
| CN2163289Y (en) * | 1993-07-02 | 1994-04-27 | 张卓然 | Split saddle reinforced board |
| US20050241713A1 (en) * | 2004-04-28 | 2005-11-03 | Shonan Gosei-Jushi Seisakusho K.K. | Method for rehabilitating an existing pipe |
| CN101981364A (en) * | 2007-03-02 | 2011-02-23 | 国一Inntot株式会社 | Connector for branch pipe |
| CN101725792A (en) * | 2009-12-10 | 2010-06-09 | 衡阳华菱连轧管有限公司 | Leaking stoppage method and device with pressure for pipeline |
| CN201795209U (en) * | 2010-08-25 | 2011-04-13 | 郑州万达管件制造有限公司 | Reinforcing three-way valve |
| CN102926466A (en) * | 2012-11-09 | 2013-02-13 | 中国矿业大学 | Method for enhancing warp angle of ring mouth flitch of steel pipe node |
| WO2015171009A1 (en) * | 2014-01-21 | 2015-11-12 | Vlad Marian Gabriel | Procedure and flexible piping made from heat shrink materials for capturing fluid leaks from damaged pipes |
| CA2892262A1 (en) * | 2014-12-11 | 2016-06-11 | Katch Kan Holdings Ltd. | Flange joint containment device |
| WO2017004671A1 (en) * | 2015-07-03 | 2017-01-12 | Vinidex Pty Limited | A pipe tee for pressure pipe |
| CN106238970A (en) * | 2016-08-11 | 2016-12-21 | 中国石油天然气集团公司 | A kind of boss angle welding composite repair reinforcement |
| CN207740609U (en) * | 2018-01-10 | 2018-08-17 | 济南市市政工程设计研究院（集团）有限责任公司 | A kind of direct burial threeway reinforcing heat distribution pipeline |
| US20190323644A1 (en) * | 2018-01-25 | 2019-10-24 | Picote Solutions Oy Ltd. | Installation device |
| CN211661447U (en) * | 2019-11-22 | 2020-10-13 | 中国石油天然气集团有限公司 | Steel pipeline circumferential weld scarf joint defect repair reinforcement sleeve |
Non-Patent Citations (1)
| Title |
|---|
| 江霞: "《焊工工艺与技能训练》", 31 May 2019 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112780877B (en) | 2023-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102491011B (en) | Large recovered oil and gas tank | |
| CN105240640B (en) | A kind of Control rod drive line displacement compensation device, shaping dies and its manufacturing process | |
| CN210088255U (en) | Metal corrugated pipe and flange connecting structure | |
| CN113199201B (en) | Sleeve for repairing butt-joint girth weld defects of tee main pipe and machining and repairing method | |
| CN112780877A (en) | B-type sleeve for repairing circumferential weld defects between three-way branch pipe and butted steel pipe and installation method thereof | |
| CN108266289B (en) | High-pressure gas double-wall pipe | |
| CN108006337A (en) | A kind of double-wall hose | |
| CN202368981U (en) | Large-scale recovered oil gas storage tank | |
| CN110778804A (en) | Oil and gas conveying pipe and manufacturing method thereof | |
| CN105546260A (en) | Metal compensator for reinforced circulating fluid bed boiler | |
| CN113199202B (en) | Sleeve for repairing weld defects of connecting ring of three-way branch pipe and machining and repairing method | |
| CN201193744Y (en) | Solderless stainless steel metal hose | |
| CN201723900U (en) | Large compensation bellows expansion joint | |
| CN210219001U (en) | Steel 90-degree r-shaped tee joint | |
| CN112856093A (en) | Expansion joint pressure outer packing construction method for gas pipeline system | |
| CN112780876B (en) | In-service repair sleeve and method for cracks of three-way pipe fitting and girth weld | |
| CN207945364U (en) | A kind of double-wall hose | |
| CN218818892U (en) | End enclosure structure for large-scale steel branch pipe hydrostatic test | |
| CN109780417A (en) | A kind of strain hardening low-temperature vessel molecular sieve filling method | |
| CN110712005A (en) | Tank storage device based on hydraulic forming technology | |
| CN214404970U (en) | Pipe with unequal wall thickness having internal transition section | |
| CN205136865U (en) | Liquid hydrogen, liquid oxygen forcing transmission metal collapsible tube for piping | |
| CN217422470U (en) | Base structure for oxygen pipeline connection | |
| CN217381972U (en) | High-pressure thick-wall reducing pipe | |
| CN211777773U (en) | Integrated stainless steel oil filling pipe suitable for large-deformation shrinkage pipe and expansion pipe forming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |