CN106764139A - A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub - Google Patents
A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub Download PDFInfo
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- CN106764139A CN106764139A CN201611232602.5A CN201611232602A CN106764139A CN 106764139 A CN106764139 A CN 106764139A CN 201611232602 A CN201611232602 A CN 201611232602A CN 106764139 A CN106764139 A CN 106764139A
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- conical section
- nuclear power
- power plant
- service system
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Classifications
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- 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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to nuclear power station operation and maintenance technical field, specifically related to a kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub, it is therefore an objective to which a kind of butt welding crossover sub for compensating the stainless steel of nominal diameter NPS 2 or below DN50 and wall thickness less than SCH160 or nickel-base alloy pipeline weld strength is provided.It is characterized in that, its generally hollow column structure, it is divided into two cylindrical sections and three conical sections, the first cylindrical section, the first conical section, the second cylindrical section, the second conical section and the 3rd conical section is followed successively by from left to right, it is coaxial between above-mentioned each section and internal diameter is equal.Nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub of the invention meets the code requirement of B31.1, stainless steel or nickel-base alloy pipeline weld strength to nominal diameter NPS 2 or below DN50 and wall thickness less than SCH160 have carried out intensity compensation, while there is seawater corrosion in eliminating structure.
Description
Technical field
The invention belongs to nuclear power station operation and maintenance technical field, and in particular to a kind of nuclear power plant's sea water service system pipeline branch pipe
Butt welding crossover sub.
Background technology
The important part of sea water service system and nuclear power plant, the operation of direct relation npp safety and generating efficiency.
The branch pipe and seawater main pipeline for having many places NPS 2 or below DN50 in pipe-line system are welded to connect.By Unite States Standard
The power plant of power conduit specification ASME B31.1 (being illustrated by 2010 editions herein) designs, sea water service system design pressure is small
In 150LB grades.The branch thickness of pipe wall grade of NPS 2 or below DN50 selects SCH40 grades.
By the regulation using 127.4.8 (F) and 127.4.8 (G) in B31.1, branch pipe is connected needs and uses with supervisor to be had
The socket weld of intensity compensation effect or the crossover sub of threaded connection.But the knot of 127.4.8 (F) and 127.4.8 (G) in B31.1
Structure is designed, and multiple etching problem had occurred in the operation of power plant sea water service system, it is necessary to redesign attachment structure and conversion connects
Head.
The content of the invention
It is used to compensate nominal diameter NPS 2 or below DN50 it is an object of the invention to provide one kind and wall thickness is less than SCH160
Stainless steel or nickel-base alloy pipeline weld strength butt welding crossover sub.
What the present invention was realized in：
A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub, generally hollow column structure is divided into two
Cylindrical section and three conical sections, are followed successively by the first cylindrical section, the first conical section, the second cylindrical section, the second conical section from left to right
With the 3rd conical section, it is coaxial between above-mentioned each section and internal diameter is equal；First cylindrical section is connected with nuclear power plant sea water service system main pipeline；
First conical section left end is small end, and right-hand member is big end, and the external diameter of small end is equal with the first cylindrical section external diameter, the external diameter held greatly and the
Two cylindrical section external diameters are equal；Second conical section left end is big end, and right-hand member is small end, big end external diameter and the second cylindrical section external diameter phase
Deng；3rd conical section left end is big end, and right-hand member is small end, and big end external diameter is equal with the second conical section small end external diameter, small end external diameter
It is equal with internal diameter；3rd conical section is connected with branch pipe.
The length of the first cylindrical section as described above is T1, wall thickness is t3；Second cylinder segment length is 40mm, and wall thickness is t2；
The cone angle of the first conical section is 60 °；The cone angle of the second conical section is 30 °；The cone angle of the 3rd conical section is 90 °, the wall thickness at big end
It is t1；The internal diameter of the first cylindrical section, the first conical section, the second cylindrical section, the second conical section and the 3rd conical section is d0。
Above-mentioned T1=T0+ 12mm, t3=1.3t0, t2=2.6t0, t1=1.3t0；T0It is nuclear power plant's sea water service system main pipeline wall
Thickness, t0It is branch thickness of pipe wall, d0It is branch nominal pipe diameter；
Crossover sub as described above is integrally made of ASME SB462UNS N08367 section bar material.
The beneficial effects of the invention are as follows：
Nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub of the invention meets the code requirement of B31.1, to nominal
The stainless steel of diameter NPS 2 or below DN50 and wall thickness less than SCH160 or nickel-base alloy pipeline weld strength have carried out intensity benefit
Repay, while there is seawater corrosion in eliminating structure.Power plant was designed using the transit joint from 2008 and welded again
Branch pipe, by 8 years, using proof, the butt welding crossover sub was that the weld strength that compensate for branch pipe root it also avoid seawater pipe
The corrosion failure risk of road branch pipe (NPS 2 or below DN50) bonding pad.
Brief description of the drawings
Fig. 1 is the front sectional view of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub of the invention.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub, generally hollow column knot
Structure, is divided into two cylindrical sections and three conical sections, be followed successively by from left to right the first cylindrical section, the first conical section, the second cylindrical section,
Second conical section and the 3rd conical section, it is coaxial between above-mentioned each section and internal diameter is equal.First cylindrical section and nuclear power plant's sea water service system
Main pipeline is connected.First conical section left end is small end, and right-hand member is big end, and the external diameter of small end is equal with the first cylindrical section external diameter, greatly
The external diameter at end is equal with the second cylindrical section external diameter.Second conical section left end is big end, and right-hand member is small end, big to hold external diameter and the second circle
Shell of column external diameter is equal.3rd conical section left end is big end, and right-hand member is small end, big end external diameter and the second conical section small end external diameter phase
Deng small end external diameter is equal with internal diameter.3rd conical section is connected with branch pipe.
The length of the first cylindrical section is T1, wall thickness is t3；Second cylinder segment length is 40mm, and wall thickness is t2；First conical section
Cone angle be 60 °；The cone angle of the second conical section is 30 °；The cone angle of the 3rd conical section is 90 °, and the wall thickness at big end is t1；First circle
The internal diameter of shell of column, the first conical section, the second cylindrical section, the second conical section and the 3rd conical section is d0。
Above-mentioned T1=T0+ 12mm, t3=1.3t0, t2=2.6t0, t1=1.3t0。T0It is nuclear power plant's sea water service system main pipeline wall
Thickness, t0It is branch thickness of pipe wall, d0It is branch nominal pipe diameter.
In the present embodiment, crossover sub is integrally made of ASME SB462UNS N08367 section bar material, can be from market
On buy.
Implementation of the invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-mentioned reality
Example is applied, in the ken that those of ordinary skill in the art possess, can also be on the premise of present inventive concept not be departed from
Various changes can be made.The content not being described in detail in description of the invention can use prior art.
Claims (3)
1. a kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub, it is characterised in that：Its generally hollow column knot
Structure, is divided into two cylindrical sections and three conical sections, be followed successively by from left to right the first cylindrical section, the first conical section, the second cylindrical section,
Second conical section and the 3rd conical section, it is coaxial between above-mentioned each section and internal diameter is equal；First cylindrical section and nuclear power plant's sea water service system
Main pipeline is connected；First conical section left end is small end, and right-hand member is big end, and the external diameter of small end is equal with the first cylindrical section external diameter, greatly
The external diameter at end is equal with the second cylindrical section external diameter；Second conical section left end is big end, and right-hand member is small end, big to hold external diameter and the second circle
Shell of column external diameter is equal；3rd conical section left end is big end, and right-hand member is small end, big end external diameter and the second conical section small end external diameter phase
Deng small end external diameter is equal with internal diameter；3rd conical section is connected with branch pipe.
2. nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub according to claim 1, it is characterised in that：Described
The length of the first cylindrical section is T1, wall thickness is t3；Second cylinder segment length is 40mm, and wall thickness is t2；The cone angle of the first conical section is
30°；The cone angle of the second conical section is 15 °；The cone angle of the 3rd conical section is 45 °, and the wall thickness at big end is t1；First cylindrical section,
The internal diameter of one conical section, the second cylindrical section, the second conical section and the 3rd conical section is d0。
Above-mentioned T1=T0+ 12mm, t3=1.3t0, t2=2.6t0, t1=1.3t0；T0It is nuclear power plant's sea water service system main pipeline wall thickness, t0
It is branch thickness of pipe wall, d0It is branch nominal pipe diameter.
3. nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub according to claim 1, it is characterised in that：Described
Crossover sub is integrally made of ASME SB462UNS N08367 section bar material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232602.5A CN106764139A (en) | 2016-12-28 | 2016-12-28 | A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232602.5A CN106764139A (en) | 2016-12-28 | 2016-12-28 | A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106764139A true CN106764139A (en) | 2017-05-31 |
Family
ID=58922552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611232602.5A Pending CN106764139A (en) | 2016-12-28 | 2016-12-28 | A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub |
Country Status (1)
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|---|---|
| CN (1) | CN106764139A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1193896A (en) * | 1959-11-05 | |||
| JPS6432987U (en) * | 1987-08-25 | 1989-03-01 | ||
| JPH07332570A (en) * | 1994-06-08 | 1995-12-22 | Kooatsu:Kk | High pressure gas pipeline |
| CN202349474U (en) * | 2011-11-01 | 2012-07-25 | 西安向阳航天材料股份有限公司 | Double-metal composite butt welding three-way pipe fitting |
| CN206522538U (en) * | 2016-12-28 | 2017-09-26 | 中核核电运行管理有限公司 | A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub |
-
2016
- 2016-12-28 CN CN201611232602.5A patent/CN106764139A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1193896A (en) * | 1959-11-05 | |||
| JPS6432987U (en) * | 1987-08-25 | 1989-03-01 | ||
| JPH07332570A (en) * | 1994-06-08 | 1995-12-22 | Kooatsu:Kk | High pressure gas pipeline |
| CN202349474U (en) * | 2011-11-01 | 2012-07-25 | 西安向阳航天材料股份有限公司 | Double-metal composite butt welding three-way pipe fitting |
| CN206522538U (en) * | 2016-12-28 | 2017-09-26 | 中核核电运行管理有限公司 | A kind of nuclear power plant's sea water service system pipeline branch pipe butt welding crossover sub |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |