CN202419038U - Internal anticorrosion alloy joint coating for pipeline - Google Patents
Internal anticorrosion alloy joint coating for pipeline Download PDFInfo
- Publication number
- CN202419038U CN202419038U CN2011202508763U CN201120250876U CN202419038U CN 202419038 U CN202419038 U CN 202419038U CN 2011202508763 U CN2011202508763 U CN 2011202508763U CN 201120250876 U CN201120250876 U CN 201120250876U CN 202419038 U CN202419038 U CN 202419038U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- resistant alloy
- corrosion resistant
- corrosion
- anticorrosion
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses an internal anticorrosion alloy joint coating for a pipeline. The internal anticorrosion alloy joint coating is an internal anticorrosion coating joint coating method for water supply and discharge pipelines in petrochemical cities. Anticorrosion alloy short pipes are lined in the pipeline. Coatings cover a part of the inner surfaces of anticorrosion steel pipes. During the welding of the pipeline, the anticorrosion alloy short pipes are jointed and welded by adopting anticorrosion welding rods or anticorrosion welding wires, and the steel pipes are welded after the welding of the lining pipes are finished. Therefore, the aim of isolating the corrosion of a medium to parent metal is fulfilled.
Description
Technical field
The utility model relates to oil, chemical pipeline, urban water supply and sewerage antirust coating in pipeline repaired mouth, does not especially need the scene that steel pipe is handled again, the repaired mouth that only needs welding junction to accomplish.
Background technique
At present, known oil, chemical pipeline undercoating patch technology have: electrostatic powder coating, the spraying of liquid coating motor-driven carrier, memory alloy repaired mouth, internal lining pipe connect repaired mouth.Deficiency is that electrostatic powder coating needs pipeline in welding process, will weld a mouth and mends a mouth, and construction speed is slow; The spraying of liquid coating motor-driven carrier all has requirement to caliber and coating, can not satisfy the repaired mouth of less caliber and pipeline bend; The higher application of memory alloy price is few; Internal lining pipe connects the outer shape that will change steel pipe makes the caliber of internal lining pipe identical with main line, and there are certain difficulty in site operation and anti-corrosion pipeline when prefabricated, and influence the attractive in appearance of abovegrade piping.
Summary of the invention
In order to overcome the deficiency of existing pipeline internal corrosion repaired mouth; The utility model provides a kind of joint coating on pipeline structure, and it is accomplished when the pipeline internal corrosion layer is prefabricated, has saved on-the-spot repaired mouth operation; Do not change the external structure of pipeline, the pipeline internal joint patch technology that direct welding can be accomplished.Corrosion-resistanting interpolating port in the pipeline corrosion resistant alloy; Be in pipeline, form, it is characterized in that: do liner with the corrosion resistant alloy pipe in the anti-corrosion pipeline interface section by carbon steel pipes, corrosion-inhibiting coating, corrosion resistant alloy pipe; One end of corrosion resistant alloy pipe connects another root corrosion resistant alloy pipe, and the other end is connected with anticorrosive coat; Corrosion resistant alloy pipe outer wall is connected with the inner-walls of duct contact; Corrosion resistant alloy Guan Yiduan is connected with pipeline anticorrosion coating is tight, and the other end is connected with corrosion resistant alloy pipe full weld.
The utility model solves the technological scheme that its technical problem adopted: before pipeline internal corrosion is prefabricated, the corrosion resistant alloy pipe is closely served as a contrast into anti-corrosion pipe two ends (gap of corrosion resistant alloy steel pipe and steel pipe should less than 0.5mm).The length of corrosion resistant alloy pipe is generally that (120～150mm), thickness is generally (between 0.5～3mm), and confirms thickness according to the size of caliber.The corrosion resistant alloy pipe reserves the length of welding, and is suitable not influence being welded as of steel pipe.When interior anticorrosive coat applies, should cover more than the corrosion resistant alloy pipe 40mm burned anticorrosive coat when corrosion resistant alloy pipe reservation 80mm welds fully.What this kind joint coating on pipeline structure was the most suitable is powder coating; End in the corrosion resistant alloy pipeline need not carry out preservative treatment, and powder coating melts the natural shutoff in back, and for example: the polyethylene powders coating thickness can reach more than the 3mm; After joint coating on pipeline was accomplished, the variation of its caliber was very little.When powder coating applied, corrosion resistant alloy pipe outer wall can not done locating point.
If the employing liquid coating need be after lining be gone into the corrosion resistant alloy pipe; Earlier reconciling into putty contacts an end in the corrosion resistant alloy pipeline with pipeline slit with the film forming matter resin of liquid coating (generally need to add a certain proportion of resin curing agent and filler) accordingly carries out shutoff and makes it and the transition of pipeline smooth interior surfaces; Corrosion-resistant construction in treating just can carry out after putty is done solid work, perhaps the spraying of pipeline internal corrosion layer is together last, when treating the corrosion-inhibiting coating surface drying; With the corrosion resistant alloy pipe serve as a contrast into; And adopt coating that the corrosion resistant alloy pipe is covered the coating more than the 40mm, until the purpose that reaches design and seal for pipe joints, but when liquid coating is anticorrosion; Corrosion resistant alloy pipe outer wall need be done locating point, prevents that the stressed collision of corrosion resistant alloy pipe from moving to destroy coating and have influence on the repaired mouth effect.
Pipeline when butt joint during site operation, adopt earlier in the part welding that corrosion resistant alloy wire solder (welding wire) reserves the corrosion resistant alloy pipe, carry out the welding of steel pipe again, joint coating on pipeline was accomplished simultaneously after welding was accomplished.
Corrosivity difference according to pipeline medium is selected the corrosion resistant alloy short tube: as: 304,316L, 904L, two phase stainless steel, monel metal, Hastelloy or the like corrosion resistant material.
Corrosion resistant alloy pipe: can adopt the intercepting of corrosion resistant alloy pipe, also can be corrosion resistant alloy sheet material and be welded through machining.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the joint coating on pipeline longitudinal section tectonic maps of the utility model.
Fig. 2 is a corrosion resistant alloy pipe longitudinal section tectonic maps.
1. carbon steel tube weld bonds among the figure, 2. corrosion resistant alloy pipe weld bond, 3. corrosion resistant alloy pipe, 4. Corrosion Resisting Steel tack weld.
Embodiment
Steel pipe need carry out the non-corrosive metal (NCM) surface before prefabricated and handles anticorrosion in Fig. 1; Derusting by sandblasting reaches the regulation of GB8923Sa2.5 level; After rust cleaning is accomplished; Corrosion resistant alloy pipe (3) lining is gone into the steel duct two ends, and this operation should be adopted plank to knock corrosion resistant alloy pipe (3) to make concordant with the port at steel pipe two ends.The coating of the internal surface of corrosion resistant alloy pipe (3) part also need be carried out sandblast makes it have certain depth of abrasion pattern, with increase its with steel pipe in the combination force of barrier coating, the coating of carrying out the interior barrier coating of steel pipe at last reaches the thickness that requires in the design.After the barrier coating construction is accomplished in the steel pipe, the port of steel pipe and corrosion resistant alloy pipe (3) is beaten the groove of 45, the groove of steel pipe and corrosion resistant alloy pipe (3) remains on same the oblique line.When on-the-spot pipeline welds, adopt Corrosion Resisting Steel welding rod (or welding wire) earlier corrosion resistant alloy pipe weld bond (2) to be welded, adopt carbon steel that carbon steel tube weld bond (1) is welded again, accomplish the repaired mouth work of pipeline simultaneously.
In Fig. 2, weld on the outer wall circumferencial direction of corrosion resistant alloy pipe (3) 2～4 independently solder joint become the position that Corrosion Resisting Steel tack weld (4) is used for fixing corrosion resistant alloy pipe (3); The attention steel pipe is beaten groove and tack weld (4) is not all destroyed, and keeps the fastening effect of corrosion resistant alloy pipe tack weld (4) in the steel pipe.
Claims (3)
1. corrosion-resistanting interpolating port in the pipeline corrosion resistant alloy; In pipeline, form by carbon steel pipes, corrosion-inhibiting coating, corrosion resistant alloy pipe, it is characterized in that: do liner with the corrosion resistant alloy pipe in the anti-corrosion pipeline interface section; One end of corrosion resistant alloy pipe connects another root corrosion resistant alloy pipe, and the other end is connected with anticorrosive coat.
2. corrosion-resistanting interpolating port in the pipeline corrosion resistant alloy according to claim 1 is characterized in that: corrosion resistant alloy pipe outer wall is connected with the inner-walls of duct contact.
3. corrosion-resistanting interpolating port in the pipeline corrosion resistant alloy according to claim 1, it is characterized in that: corrosion resistant alloy Guan Yiduan is connected with pipeline anticorrosion coating is tight, and the other end is connected with the corrosion resistant alloy full weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202508763U CN202419038U (en) | 2011-07-16 | 2011-07-16 | Internal anticorrosion alloy joint coating for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202508763U CN202419038U (en) | 2011-07-16 | 2011-07-16 | Internal anticorrosion alloy joint coating for pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202419038U true CN202419038U (en) | 2012-09-05 |
Family
ID=46743801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202508763U Expired - Fee Related CN202419038U (en) | 2011-07-16 | 2011-07-16 | Internal anticorrosion alloy joint coating for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202419038U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106051320A (en) * | 2016-06-24 | 2016-10-26 | 延安中海石油工程技术开发有限公司 | Alloy steel composite heat avoidance connector and method for connecting anticorrosive steel pipes through alloy steel composite heat avoidance connector |
| CN113785151A (en) * | 2019-04-29 | 2021-12-10 | Sms集团有限公司 | Metal pipe, in particular a pipe for transporting oil and gas, having a metal coating in the transition region |
| CN114950873A (en) * | 2022-06-19 | 2022-08-30 | 陕西华辰亚联石油工程有限公司 | Anticorrosion process for factory prefabricated corrosion-resistant alloy inner joint coating of fluid conveying pipeline |
-
2011
- 2011-07-16 CN CN2011202508763U patent/CN202419038U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103008988B (en) * | 2013-01-04 | 2016-03-23 | 哈尔滨工业大学 | The method of internal joint patch weldering exempted from by a kind of anticorrosive steel pipeline |
| CN106051320A (en) * | 2016-06-24 | 2016-10-26 | 延安中海石油工程技术开发有限公司 | Alloy steel composite heat avoidance connector and method for connecting anticorrosive steel pipes through alloy steel composite heat avoidance connector |
| CN113785151A (en) * | 2019-04-29 | 2021-12-10 | Sms集团有限公司 | Metal pipe, in particular a pipe for transporting oil and gas, having a metal coating in the transition region |
| CN114950873A (en) * | 2022-06-19 | 2022-08-30 | 陕西华辰亚联石油工程有限公司 | Anticorrosion process for factory prefabricated corrosion-resistant alloy inner joint coating of fluid conveying pipeline |
| CN114950873B (en) * | 2022-06-19 | 2023-01-31 | 陕西华辰亚联石油工程有限公司 | Corrosion prevention process for factory prefabricated corrosion-resistant alloy inner joint coating of fluid conveying pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202419038U (en) | Internal anticorrosion alloy joint coating for pipeline | |
| CN103862145A (en) | Butt welding method of pipeline lined with coating | |
| CN101694261A (en) | Internal repaired mouth construction process of internal coating pipeline | |
| CN103912740B (en) | Nondestructive welding joint for long-distance pipeline steel pipe with inner coating | |
| CN105927822A (en) | Corrosion-resistance composite pipe and manufacturing method thereof | |
| CN111828777B (en) | Processing method of pipeline anticorrosive coating | |
| CN2893362Y (en) | Seawater corrosion resisting modified epoxy ceramic anticorrosion layer seawater filling pipe | |
| CN1247817C (en) | Method of protecting corrosion proof pipeline joint internal wall using sacrificing anode | |
| CN202419039U (en) | Petrolatum cladding erosion resistant coating for metallic conduit connector and connecting flange | |
| CN106322051A (en) | Corrosion-resistant pipeline and connecting method of corrosion-resistant pipeline | |
| CN206973094U (en) | A kind of steel pipe two-part exempts from the dead mouth of interior corrosion-resistanting interpolating port and connects head assembly | |
| CN202349420U (en) | Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials | |
| JP5945185B2 (en) | Method for manufacturing pipe component with anti-corrosion coating on outer surface | |
| CN201615318U (en) | Metal anti-corrosion pipeline connector | |
| RU142274U1 (en) | TUBE WITH PIPES AND INTERNAL COATING | |
| CN207145836U (en) | A kind of heavy antisepsis elbow bend pipe | |
| CN101696759A (en) | Anti-corrosive treatment method of welded junction part of construction process pipe of heavy caliber push pipe | |
| CN201964089U (en) | Anticorrosion pipeline | |
| CN205579037U (en) | Corrosion -resistant compound pipe | |
| CN205956585U (en) | Anticorrosive repaired mouth structure of exempting from in spiral weld pipe | |
| RU136520U1 (en) | REPAIRED WELDED CONNECTION OF PIPES WITH INTERNAL COATING IN THE PIPELINE | |
| RU137079U1 (en) | WELDED TEE TEE PROTECTED FROM INTERNAL CORROSION WITH CORROSION-RESISTANT STEEL COATING AND SHOES | |
| CN220581890U (en) | Plastic-coated anticorrosion nodular cast iron pipe containing carbon steel lining | |
| CN2784707Y (en) | Section bar for heavy caliber plastic-steel strip composite corrugated wrapped pipe | |
| RU68000U1 (en) | PROTECTED COATED PIPE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20130716 |