CN1031956C - Sleeve-bonding jointing method for weld of lining pipe - Google Patents
Sleeve-bonding jointing method for weld of lining pipe Download PDFInfo
- Publication number
- CN1031956C CN1031956C CN 94110643 CN94110643A CN1031956C CN 1031956 C CN1031956 C CN 1031956C CN 94110643 CN94110643 CN 94110643 CN 94110643 A CN94110643 A CN 94110643A CN 1031956 C CN1031956 C CN 1031956C
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- lining
- lining pipe
- weld
- sleeve
- internal joint
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Abstract
The present invention discloses a sleeve-bonding opening jointing method for a weld opening of a lining pipe. The present invention is characterized in that an inner opening jointing sleeve with the surface having chemical industrial enamel and a thermal insulating coating is firstly preformed. An adhesive is firstly coated on the interface part of the lining pipe on a construction site. Then, the lining pipe is pushed in the inner opening jointing sleeve. Thus, the adhesive is densely combined with the end surface of a preserved lining. Then, fixation is implemented by spot welding, and an interface welding seam is well welded. The opening jointing method has the main advantages of good anticorrosion performance, good sticking performance and good high temperature resistance and overcomes the defect that a hole is arranged on a pipe wall so that anticorrosion paint is injected of the prior art. Thus, the pipe is not damaged, and construction is very convenient. The present invention is widely used for anticorrosion opening jointing in various inner lining pipes.
Description
The present invention relates to pipeline lining aseptic technic field, particularly lining pipe weld bond place adopts the repaired mouth sleeve-bonding jointing method.
The steel pipeline is in order to prevent inner wall corrosion, and coating inner lining (also claiming undercoating) is a kind of effective measures.The preformed liner material of single steel pipe is existing multiple, and the technological method of its preformed liner is extensive use also, but also must carry out interior corrosion-resistanting interpolating port to the per pass weld bond at the pipeline construction scene, thereby reaches the purpose of whole piece pipeline inner wall anti-corrosive.So the weld bond jointing method of lining pipe also just becomes a new research topic.Existing by retrieval relevant patent documentation, for example, B. P. " welding side's enamel of lining pipe " (GB2094915A), this method will be made a call to two apertures on weld bond place tube wall, inject behind the anticorrosive paint tapping shutoff aperture again, and this method only is applicable to polyurethane lining pipeline, and its polyurethane cover is difficult to guarantee anticorrosive quality with lining junction plane place, and the anticorrosive paint of injection also is difficult to guarantee pore-free.Chinese patent " corrosion-preventing method for welding zone internal wall of lining steel pipe " (93103221.0) and for example, also on tube wall, punch, inject anticorrosive paint by aperture, and then aperture rivetted and the spot welding shutoff, shortcoming also is that pipeline is caused damage, especially high pressure line never allows, and has also increased workload simultaneously.Again for example, Chinese patent " interior corrosion-resistanting interpolating port ring " (92238102.X), though do not punch on tube wall, rubber sleeve that adopts or elasticity polyurethane cover heat resistance are relatively poor, the metal ring at weld bond place is difficult to every living the high temperature that welding produces, elastic sleeve will be burnt out.Elastic sleeve and lining coating are reserved and are pressing between the end face, and it is good to be not so good as adhesive effect.
The objective of the invention is to overcome the shortcoming and defect part of above-mentioned prior art, can ensure the quality of products, make things convenient for site operation again for corrosion-resistanting interpolating port in the lining pipe weld bond provides a kind of, to the pipeline not damaged, Xian Jin jointing method more.
Above-mentioned purpose of the present invention is realized by following technical proposals:
Employing has the chemical enamel and the composite heat resistance material of highly corrosion resistant performance, combines with metal matrix that to be prefabricated into internal joint patch cover standby.At the pipeline construction scene, earlier, again the internal joint patch cover is pushed this pipe end, and knock with wooden mallet to lining pipe interface position adhesive coating that will the counterpart welding in place, make it bonding firmly.Again with another lining interface tube position adhesive coating, and push second half of internal joint patch cover.After spot welding is fixing, the counterpart weld seam is welded by welding conditions.By that analogy, can finish the weld bond internal joint patch operation of some lining mouths of pipe, elbow, pipe nipple, make whole piece inner lining pipeline have the lining coating of continuous whole, and guarantee anticorrosive quality in it.
Above-mentioned internal joint patch cover is made of metal matrix, glassiness glaze layer and heat insulating coat.Its prefabricated process is to make carcass earlier, acid-proofenamel is divided to be coated on (one deck ground-coat enamel, two-layer cover-coat enamel) on the carcass for three times again, after the multiple high temp calcining, just as enamel is attached to the carcass surface, forms fine and close, corrosion resistant glassiness glaze layer.Apply heat insulating coat then in the circular groove of carcass outer surface, normal temperature is done solid.
The metal matrix of above-mentioned internal joint patch cover adopts low carbon steel or cast iron manufacturing, the circular groove of its outer surface position that mediates, and the circular groove both sides are conical surface, its diameter and wall thickness are by caliber and the decision of lining coating.
Add fillers such as 20～100% cement, sulphur, asbestos powder, glass fibre in the above-mentioned adhesive, can guarantee its resistance to high temperature.
Major advantage of the present invention is: because the decay resistance of internal joint patch cover is fabulous, and has injected the bonding interface agent, applied heat insulating coat, so antiseptic property, adhesive property, resistance to high temperature are all fine.Construction operation is very convenient, must not punch on tube wall, perforations adding, and pipeline is not caused damage.Be applicable to the internal joint patch of the lining pipe of various conveying oilfield sewages, urban sewage, bittern and chemical liquid, and can be used for the on-the-spot internal joint patch operation of dead mouth, elbow, pipe nipple.Its cost is lower than prior art.
Accompanying drawing 1 is the structural representation of the internal joint patch cover of making according to the present invention.
Accompanying drawing 2 is the inner wall anti-corrosive structural representations at the inner lining pipe weld bond place of making according to the present invention.
Details are as follows to embodiments of the invention in conjunction with the accompanying drawings:
Among Fig. 1, the 1st, internal joint patch cover carcass, the 2nd, glassiness glaze layer, the 3rd, heat insulating coat.Carcass 1 usefulness low carbon steel or cast iron manufacturing.Acid-proofenamel divided be coated on for three times on the carcass 1, one deck ground-coat enamel, two-layer cover-coat enamel, on the multiple high temp calcining makes it as enamel attached to the carcass surface, formation glassiness glaze layer 2, thickness is generally 0.8～1.2 millimeter.Apply heat insulating coat 3 then in the circular groove of carcass 1, present embodiment is selected the B-44 insulating moulding coating for use.Can be according to diameter, lining coating classification and the different-thickness of lining pipe, the internal joint patch cover that is prefabricated into each specification is standby.
Among Fig. 2, the 4th, adhesive, the 5th, steel pipe, the 6th, the steel tubing coating, the 7th, the lining coating is reserved end face, the 8th, steel pipe counterpart weld seam.When constructing at the scene, handle the mouth of pipe of steel pipe 5 well interface by the repaired mouth requirement.At interface position adhesive coating 4A, present embodiment adopts YO-59 and SG-200, adds fillers such as 20～100% cement, sulphur, asbestos powder, glass fibre.Half that above-mentioned internal joint patch is overlapped pushes the mouth of pipe of steel pipe 5A, and knocks with wooden mallet, and it is closely knit to make itself and lining coating reserve end face 7A knot platform.Reserve end face 7B adhesive coating 4B to the lining coating of steel pipe 5B again, second half of internal joint patch cover is under conical surface guiding, and 5B pushes with steel pipe.After spot welding is fixing,, finish the welding of circular weld 8 by the welding conditions welding.
Claims (4)
1. weld of lining pipe sleeve-bonding jointing method, it is characterized in that adopting chemical enamel and composite heat resistance material with highly corrosion resistant performance, combine with metal matrix that to be prefabricated into the internal joint patch cover standby, at the pipeline construction scene, earlier, again the internal joint patch cover is pushed this pipe end, again with the interface position adhesive coating of another lining pipe to the interface position of lining pipe adhesive coating, and push second half of internal joint patch cover, after spot welding is fixing the counterpart weld seam is welded.
2. weld of lining pipe sleeve-bonding jointing method according to claim 1, it is characterized in that the internal joint patch cover is by metal matrix, glassiness glaze layer and heat insulating coat constitute, its prefabricated process is to make carcass earlier, again acid-proofenamel is divided and be coated on the carcass for three times, after the multiple high temp calcining, form glassiness glaze layer on the carcass surface, in the circular groove of carcass outer surface, apply heat insulating coat then.
3. weld of lining pipe sleeve-bonding jointing method according to claim 1 and 2, the metal matrix that it is characterized in that the internal joint patch cover adopts low carbon steel or cast iron manufacturing, the circular groove of its outer surface position that mediates, the circular groove both sides are conical surface, and its diameter and wall thickness are by caliber and the decision of lining coating.
4. weld of lining pipe sleeve-bonding jointing method according to claim 1 is characterized in that adding in the adhesive fillers such as 20～100% cement, sulphur, asbestos powder, glass fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110643 CN1031956C (en) | 1994-05-27 | 1994-05-27 | Sleeve-bonding jointing method for weld of lining pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110643 CN1031956C (en) | 1994-05-27 | 1994-05-27 | Sleeve-bonding jointing method for weld of lining pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1099110A CN1099110A (en) | 1995-02-22 |
| CN1031956C true CN1031956C (en) | 1996-06-05 |
Family
ID=5034590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94110643 Expired - Fee Related CN1031956C (en) | 1994-05-27 | 1994-05-27 | Sleeve-bonding jointing method for weld of lining pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031956C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694261B (en) * | 2009-10-19 | 2013-04-17 | 中国石油集团渤海石油装备制造有限公司 | Internal repaired mouth construction process of internal coating pipeline |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070098C (en) * | 1997-09-23 | 2001-08-29 | 石油大学(华东) | Welding process for replacing corrosionproof treatment of metal welding |
| CN101968143A (en) * | 2010-09-16 | 2011-02-09 | 沈阳化工大学 | Method for performing corrosion resistant joint coating to pipeline joint |
| US8622094B2 (en) * | 2011-07-18 | 2014-01-07 | Air Products And Chemicals, Inc. | Metal dusting protection for welded pipe assemblies |
| CN103899857A (en) * | 2014-04-09 | 2014-07-02 | 洛阳超拓实业有限公司 | Rubber-lined pipeline docking method |
| CN103994302B (en) * | 2014-05-30 | 2015-12-30 | 山西太钢不锈钢股份有限公司 | Base reinforcement of weld method mended by gas pipe line |
| CN106514069A (en) * | 2016-12-06 | 2017-03-22 | 上海航天设备制造总厂 | Device inhibiting welding defects of small-diameter aluminum alloy guiding pipe |
| CN110131492A (en) * | 2019-05-13 | 2019-08-16 | 中国二十冶集团有限公司 | A kind of connection method of liner pipe |
-
1994
- 1994-05-27 CN CN 94110643 patent/CN1031956C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694261B (en) * | 2009-10-19 | 2013-04-17 | 中国石油集团渤海石油装备制造有限公司 | Internal repaired mouth construction process of internal coating pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1099110A (en) | 1995-02-22 |
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