CN107052710A - A kind of undercoating pipeline manufacture method - Google Patents
A kind of undercoating pipeline manufacture method Download PDFInfo
- Publication number
- CN107052710A CN107052710A CN201611192848.4A CN201611192848A CN107052710A CN 107052710 A CN107052710 A CN 107052710A CN 201611192848 A CN201611192848 A CN 201611192848A CN 107052710 A CN107052710 A CN 107052710A
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- CN
- China
- Prior art keywords
- undercoating
- corrosion resistant
- resistant alloy
- pipeline
- welding
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- 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.)
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Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
-
- 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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention discloses a kind of undercoating pipeline manufacture method, comprise the following steps：Half U type groove is processed on steel tube end part inwall using machine-tooled method；GTAW welding method built-up welding corrosion resistant alloys are used in half U type rooved face, until being flushed with inner surface of pipeline, corrosion resistant alloy overlay cladding are formed；Overall coating anti-rot material, forms undercoating in pipeline, and undercoating is overlapped with part corrosion resistant alloy overlay cladding.The present invention processes half U type groove on steel tube end part inwall, it is used as the overlaying surface of corrosion resistant alloy, corrosion resistant alloy overlay cladding is set to be effectively isolated the undercoating of steel tube end part, so that being carried out while undercoating is damaged from butt welding by corresponding corrosion resistant alloy wlding after tubing butt welding it is not necessary to do postwelding repaired mouth, and the present invention will not change the latus rectum size of steel pipe joint, it effectively prevent flow field present in prior art and corrode.
Description
Technical field
The present invention relates to pipeline manufacturing technology field, a kind of undercoating pipeline manufacture method is specifically related to.
Background technology
In the fluid media (medium) of transfer oil, natural gas and water or serious corrosion, usually prevented using undercoating pipeline
Trandfer fluid medium corrodes to tubing, but often exists after being welded between undercoating pipeline using conventional carbon steel welding rod at repaired mouth
Reason problem, and repaired mouth quality directly influences the service life of whole piece pipeline.At present, welded to solve undercoating pipeline
Repaired mouth problem after connecing, one kind is to enter to carry out repaired mouth and coating reparation in pipeline using industrial pipeline robot, but this method
It is extremely difficult to the quality level of the prefabricated anticorrosive coat of batch production.Derusting is extremely difficult to factory operation level, coating at repaired mouth
Adhesive force is affected, and all high temperature resistants, high pressure, high corrosion and low temperature resistant special powder anticorrosive paint be required to it is special solid
Change plasticizing, have no idea to complete live repaired mouth.Two be to use lined coating adapter sleeve, but can reduce pipeline using adapter sleeve
Latus rectum, adapter sleeve two ends pumped (conveying) medium flow field changes, and easily produces vortex, causes local latus rectum to reduce, flow velocity increase, plus
Acute local scour, easily forms flow field corrosion.In addition, there is also defect, such as Chinese patent CN2149540 in itself for adapter sleeve technology
Disclosed rubber sleeve or elastic polyurethane set, its heat resistance is poor, and becket is difficult to the high temperature of barrier welding generation at weld bond,
Resilient sleeve will be burned, and be pressing between resilient sleeve and the reserved face of coating, be not as good as bond effect.Chinese patent
Enamel internal joint patch set disclosed in CN1099110, is easily damaged installation difficulty greatly, and surface does not have locating stop piece, during installation very
It is difficult to ensure that card internal joint patch covers heat insulating belt at two pipe-joints.
The content of the invention
For technical problem present in above-mentioned prior art, there is provided applied in one kind in prior art basis by the present invention
, there is the problem of repaired mouth quality is difficult to ensure that after overcoming existing undercoating pipeline welding, make undercoating in layer pipeline manufacture method
Pipeline butt joint corrosion resisting property meets or exceeds undercoating, and pipe safety reliability service, and this hair is effectively ensured
Bright construction cost is low, and process is easily controlled.
The main purpose for being achieved through the following technical solutions foregoing invention creation of the invention.
A kind of undercoating pipeline manufacture method, comprises the following steps：
Step one, tube end maching, half U type groove is processed using machine-tooled method on steel tube end part inwall；
Step 2, pipe end built-up welding uses GTAW welding method built-up welding corrosion resistant alloys in half U type rooved face, forms anti-corrosion close
Golden overlay cladding, the surface of corrosion resistant alloy overlay cladding is flushed with inner surface of pipeline；
Step 3, coating coating, the overall coating anti-rot material formation undercoating in steel pipe, undercoating and the anti-corrosion conjunction in part
Golden overlay cladding is overlapped；
Further, the half U type groove height processed in the step one is 1~3mm.
Further, in the step 3, undercoating is at least 10mm with corrosion resistant alloy overlay cladding overlap width.
Further, in the step 3, corrosion resistant alloy overlay cladding does not cover internally coated width at least 50mm.
Further, resurfacing welding material is 310Mo type gas protecting welding wires in the step 2.
Further, the chemical analysis of the 310Mo types gas protecting welding wire includes：C≤0.12%, Si≤0.75%,
1.0%≤Mn≤2.5%, P≤0.03%, S≤0.03%, 25%≤Cr≤28%, 2.0%≤Mo≤3.0%, 20%≤Ni
≤ 22%, Cu≤0.75%.
Further, after half U type groove processing is finished in the step one, half U type rooved face burr is removed, and it is clear with acetone
The greasy dirt washed on half U type groove.
The half U type groove is that the corner of step uses arc transition in steel tube end part processing step.
Compared with prior art, the present invention at least has the advantages that：
The present invention processes half U type groove on steel tube end part inwall, as the overlaying surface of corrosion resistant alloy, makes corrosion resistant alloy built-up welding
Layer can be effectively isolated the undercoating of steel tube end part, so that undercoating is from welding damage, while effectively being covered using coating
Corrosion resistant alloy overlay cladding and pipeline interface eliminate the galvanic corrosion puzzlement of heterogeneous material contact, and the present invention will not change
The latus rectum size of steel pipe joint, effectively prevent flow field present in prior art and corrodes, and the structure design of half U type groove is closed
Reason, can effectively prevent stress concentration from causing the impaired destruction of pipeline, effectively enhance the tolerance of pipeline.
Further, the present invention processes half U type groove in steel tube end part, and built-up welding forms corrosion resistant alloy heap in half U type groove
After layer, while the corrosion-resistant alloy layer of welding region in pipe can be formed after carrying out tubing docking by corresponding corrosion resistant alloy wlding
Connection, it is ensured that the corrosion resisting property of docking weld bond, and the present invention need not carry out postwelding coating repaired mouth, effectively prevent existing skill
Coating repaired mouth problem in art.
Further, corrosion resistant alloy overlay cladding does not cover internally coated width at least 50mm, is taken in butt welding of steel tube
Cheng Zhong, at least leave 100mm does not cover undercoating region, and the butt welding that avoids of high degree causes undercoating to be damaged
Situation.
Further, it is 1~3mm that the height of the invention by numerous studies discovery half U type groove is optimal, if half U type groove is high
Degree is too low, then causes corrosion resistant alloy overlay cladding too thin, and then easily appears in burn corrosion resistant alloy heap in butt welding of steel tube termination process
The situation of layer, influences the corrosion resisting property of corrosion resistant alloy overlay cladding, if half U type groove height is too high, corrosion resistant alloy overlay cladding is too
Thickness, the problem of having uneconomical practical.
Brief description of the drawings
Fig. 1 processes half U type groove schematic diagram for the steel tube end part of the present invention；
Fig. 2 is half U type rooved face built-up welding schematic diagram of the invention；
Fig. 3 applies schematic diagram for the steel pipe undercoating of the present invention；
Reference and each component names in figure is as follows：
1- steel pipes, 2- half U type grooves, 3- corrosion resistant alloy overlay claddings, 4- undercoating.
Embodiment
Preferably to implement the present invention, with specific embodiment, the present invention is described in further detail below.
A kind of undercoating pipeline manufacture method that the present embodiment is implemented, comprises the following steps：
Step one, tube end maching, as shown in figure 1, processing half U type on the inner wall of end of steel pipe 1 using machine-tooled method
Groove 2, the length of half U type groove 2 is 60~150mm, is highly 1~3mm, the completion of processing of half U type groove 2, deburring, and uses acetone
Clean greasy dirt on half U type groove 2；
Step 2, pipe end built-up welding, as shown in Fig. 2 in the surface overlaying corrosion resistant alloy of half U type groove 2, until and inner surface of pipeline
Flush, form corrosion resistant alloy overlay cladding 3, overlaying method is GTAW, using 310Mo type gas protecting welding wires, selected in the present embodiment
With the concrete model Φ 2mm of welding wire ER310Mo-16, welded under argon gas protection, welding current is that 120~140A welds electricity
Press as 16V, polishing machine reconditioning corrosion resistant alloy overlay cladding 3 is used after the completion of built-up welding；
Step 3, coating coating, as shown in figure 3, the overall coating anti-rot material in steel pipe 1, forms undercoating 4, wherein
Undercoating 4 and the overlap width of corrosion resistant alloy overlay cladding 3 of the end of steel pipe 1 are at least 10mm.
In summary, the present invention processes a half U type groove 2 on the inner wall of end of steel pipe 1, is used as the built-up welding of corrosion resistant alloy
Face, enables corrosion resistant alloy overlay cladding 3 to be effectively isolated the undercoating 4 of the end of steel pipe 1, so that undercoating 4 is from welding damage
While carried out by corresponding corrosion resistant alloy wlding after tubing butt welding it is not necessary to do postwelding repaired mouth, and the present invention will not
Change the latus rectum size of the joint of steel pipe 1, effectively prevent flow field present in prior art and corrode.
Claims (8)
1. a kind of undercoating pipeline manufacture method, it is characterised in that comprise the following steps：
Step one, tube end maching, half U type groove (2) is processed using machine-tooled method on steel pipe (1) inner wall of end；
Step 2, pipe end built-up welding uses GTAW welding method built-up welding corrosion resistant alloys on half U type groove (2) surface, forms corrosion resistant alloy
Overlay cladding (3), the surface of corrosion resistant alloy overlay cladding (3) is flushed with inner surface of pipeline；
Step 3, coating coating, overall coating anti-rot material formation undercoating (4), undercoating (4) and part in steel pipe (1)
Corrosion resistant alloy overlay cladding (3) is overlapped.
2. undercoating pipeline manufacture method according to claim 1, it is characterised in that：The half U type processed in the step one
Groove (2) is highly 1~3mm.
3. undercoating pipeline manufacture method according to claim 1, it is characterised in that：In the step 3, undercoating (4) with
Corrosion resistant alloy overlay cladding (3) overlap width is at least 10mm.
4. undercoating pipeline manufacture method according to claim 1, it is characterised in that：In the step 3, corrosion resistant alloy heap
The width that layer (3) does not cover undercoating (4) is at least 50mm.
5. undercoating pipeline manufacture method according to claim 1, it is characterised in that：Resurfacing welding material is in the step 2
310Mo type gas protecting welding wires.
6. undercoating pipeline manufacture method according to claim 5, it is characterised in that by weight percentage, the 310Mo
The chemical analysis of type gas protecting welding wire includes：C≤0.12%, Si≤0.75%, 1.0%≤Mn≤2.5%, P≤0.03%,
S≤0.03%, 25%≤Cr≤28%, 2.0%≤Mo≤3.0%, 20%≤Ni≤22%, Cu≤0.75%.
7. undercoating pipeline manufacture method according to claim 1, it is characterised in that：Half U type groove (2) adds in the step one
After work is finished, half U type groove (2) surface spikes are removed, and greasy dirt on half U type groove (2) is cleaned with acetone.
8. undercoating pipeline manufacture method according to claim 1, it is characterised in that：The half U type groove (2) is in steel pipe
(1) end processing step, the corner of step uses arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192848.4A CN107052710A (en) | 2016-12-21 | 2016-12-21 | A kind of undercoating pipeline manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192848.4A CN107052710A (en) | 2016-12-21 | 2016-12-21 | A kind of undercoating pipeline manufacture method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107052710A true CN107052710A (en) | 2017-08-18 |
Family
ID=59619733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611192848.4A Pending CN107052710A (en) | 2016-12-21 | 2016-12-21 | A kind of undercoating pipeline manufacture method |
Country Status (1)
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| CN (1) | CN107052710A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109834365A (en) * | 2019-03-08 | 2019-06-04 | 中国石油天然气集团有限公司 | A kind of processing method for small-bore internal coat pipeline butt welding |
| CN111561617A (en) * | 2020-03-26 | 2020-08-21 | 徐州尚航船舶配件有限公司 | Wear-resistant corrosion-resistant steel pipe for ship and polishing process thereof |
| CN112501611A (en) * | 2020-12-02 | 2021-03-16 | 山东胜利长龙管道科技有限公司 | Method for coating corrosion-resistant alloy on pipe orifice of combined steel pipe |
| CN113492295A (en) * | 2020-11-07 | 2021-10-12 | 胜利油田金岛工程安装有限责任公司 | Shaping process of steel pipe with unequal wall thickness |
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| CN201149150Y (en) * | 2007-12-24 | 2008-11-12 | 郭衡纲 | Composite steel tube of end inner wall build-up welding corrosion resisting alloy layer |
| CN103008988A (en) * | 2013-01-04 | 2013-04-03 | 哈尔滨工业大学 | Method for welding anticorrosion steel pipeline with no internal repaired mouth |
| CN103216682A (en) * | 2013-05-09 | 2013-07-24 | 中国海洋石油总公司 | Composite tube and manufacture method thereof |
| CN203560610U (en) * | 2013-08-31 | 2014-04-23 | 宝鸡石油钢管有限责任公司 | Mechanical composite pipe with overlay-welded corrosion-resistant alloy layer on pipe end |
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| CN103008988A (en) * | 2013-01-04 | 2013-04-03 | 哈尔滨工业大学 | Method for welding anticorrosion steel pipeline with no internal repaired mouth |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109834365A (en) * | 2019-03-08 | 2019-06-04 | 中国石油天然气集团有限公司 | A kind of processing method for small-bore internal coat pipeline butt welding |
| CN111561617A (en) * | 2020-03-26 | 2020-08-21 | 徐州尚航船舶配件有限公司 | Wear-resistant corrosion-resistant steel pipe for ship and polishing process thereof |
| CN113492295A (en) * | 2020-11-07 | 2021-10-12 | 胜利油田金岛工程安装有限责任公司 | Shaping process of steel pipe with unequal wall thickness |
| CN112501611A (en) * | 2020-12-02 | 2021-03-16 | 山东胜利长龙管道科技有限公司 | Method for coating corrosion-resistant alloy on pipe orifice of combined steel pipe |
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Application publication date: 20170818 |