CN1110385A - Antiseptic steel pipe technology non-repairing inner and outer orifice - Google Patents
Antiseptic steel pipe technology non-repairing inner and outer orifice Download PDFInfo
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- CN1110385A CN1110385A CN 94110521 CN94110521A CN1110385A CN 1110385 A CN1110385 A CN 1110385A CN 94110521 CN94110521 CN 94110521 CN 94110521 A CN94110521 A CN 94110521A CN 1110385 A CN1110385 A CN 1110385A
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Abstract
The present invention discloses a technology exempting pipe orifice from patching for steel pipe with anticorrosive coating, applicable to anticorrosive treatment for welded joint of steel pipeline with anticorrosive coating in chemical and petroleum industries. Its key point is as follows: a section of stainless steel inner lining and a section of external jacket are welded on each end of every pipe by using explosion welding method, and then the inner lining, pipe body and external jacket are respectively welded by using step brazing method so as to exempt in-place orifice-patching process. Said invention is applicable to medium- and small caliber pipe coated with organic or inorganic coating, and has the advantages of low cost, simple construction and reliable performance.
Description
Present technique belongs to the steel pipeline aseptic technic and particularly is with anticorrosive coated steel pipeline welding mouth aseptic technic.
Usually it is anticorrosion and outer anticorrosion in oil, chemical industry steel pipeline need to improve anti-corrosion capacity, generally be coated with and be welded into long lines to on-the-spot counterpart after operation organic or the inorganic anti-corrosion layer is prefabricated in the factory, because anticorrosive coat lost efficacy near high temperature usually caused weld seam during welding, abbreviate " internal joint patch ", " outlet " respectively as at inwall, outer wall weld seam coating corrosion-inhibiting coating, because limitation of construction repaired mouth difficult quality guarantee, cause pipeline to shorten greatly service life, only be the 1/40-1/4 of projected life, the whole nation year accumulating losses are above 300,000,000 yuan according to statistics.Jointing method at present commonly used has 1. to spile in the weld joint and puts in small brushes and mend brush applied coating, 2. use remote operated vehicle in pipe, to walk to the weld seam repaired mouth to heavy-caliber pipeline, 3. make packing in the internal joint patch with memory alloy, 4. with stainless steel short tube joint, 5. iron-base marmem joint technology.Cost height, technical sophistication that these methods have, the difficult accurately control that has, the accommodation that has is little all not ideal enough.
The purpose of this invention is to provide a kind of in using anticorrosion, outer anticorrosion or internal and external anti-corrosive in small-bore steel pipeline do not need to carry out again the repaired mouth operation after the counterpart welding at the scene, and with low cost exempt from inside and outside patch technology.
The present invention realizes by following manner, before the pipeline coated anti-corrosion layer, need the inwall of coated anti-corrosion layer earlier at every pipeline, the inner lining of the preceding paragraph corrosion resisting stainless steel is welded at outer wall or inside and outside wall two ends with the method weldering method of explosive welding, outer tube sleeve, again at the steel pipe walls coated anti-corrosion layer, by welding process requirement interface tube is held successfully groove during the welding of pipeline counterpart, earlier carry out back cover with stainless steel electrode soldering stainless steel inner lining, use again and the corresponding carbon steel welded steel pipe of steel pipe material body, with stainless steel electrode soldering stainless steel outer sleeve block, get final product then as only needing internal joint patch or outlet then only need finish the operation that needs.In the stainless steel inner lining and the length of the outer sleeve shortest length that high temperature can not destroy the corrosion-inhibiting coating performance during by welding determine to be generally 40-70mm, its wall thickness δ=1.3-1.5mm, its inner end of resistance is 30 ° of acute angles for ease of coated anti-corrosion layer and when reducing media flow.
The present invention has adopted this results new technology of explosive welding, guaranteed that institute adds in the stainless steel inner lining and outer sleeve is combined closely with the steel pipe body, used the layering welding to solve interior this technical barrier of outlet of middle small-bore pipeline, it is low to have a cost, construction is simple, adapts to wide characteristics.The present invention both had been applicable to epoxy powder, H
87Organic anti-corrosive coating such as coating, 8701 coating, EP-67 scale also are applicable to inorganic anti-corrosion coatings such as cement mortar liner, enamel, sprayed ceramic, heat spray glass glaze.Can be used for high low pressure and temperature variation for-30 ℃-250 ℃ oilfield sewage pipeline, contain sewage crude oil transmission pipeline, desert petroleum pipeline, offshore oil pipeline and carry the chemical pipeline of aggressive medium.
Further invention is described below in conjunction with accompanying drawing:
Figure one is outlet pipeline sectional drawing in exempting from.
Figure two is for exempting from internal joint patch pipeline sectional drawing.
Figure three is for exempting from outlet pipeline sectional drawing.
With reference to figure one, in stainless steel inner lining in the end explosive welding of steel pipeline (1) (3), high temperature can not destroy corrosion-inhibiting coating (7) when reaching its length of outer sleeve (2) by welding, the shortest length of performance (8) is determined, be generally 40-70mm, its wall thickness δ=1.3-1.5mm, its inner end is 30 ° of acute angles, hold groove successfully two pipeline weldings place, use the carbon steel welded pipe line body (4) of corresponding material earlier again with stainless steel electrode welding inner lining back cover (6), with stainless steel electrode solder mask pipe block (5), present technique is applicable to all size steel pipeline of outer diameter tube D=∮ 89-∮ 529mm wall thickness S=4.5-20mm then.
Then see figure two as only exempting from internal joint patch, see figure three as only exempting from outlet, its main technical point is the same.
Claims (4)
1, a kind of band anticorrosive coated steel pipeline welding mouth inside and outside wall is exempted from patch technology, before pipeline (1) coated anti-corrosion layer, needing at every pipeline earlier it is characterized in that the inwall of coated anti-corrosion layer, outer wall or the inside and outside wall two ends method of explosive welding, welding the preceding paragraph corrosion resisting stainless steel inner lining (3), outer sleeve (2) coats anticorrosive coat (7) again on steel pipe walls, (8), by technological requirement interface tube is held successfully groove during the welding of pipeline counterpart, earlier with stainless steel electrode soldering stainless steel inner lining back cover (6), use again and the corresponding carbon steel welded steel pipe of steel pipe material body (4), then with stainless steel electrode soldering stainless steel outer sleeve block (5).
2, by the inside and outside patch technology of exempting from of claim 1 regulation, it is characterized in that explosive welding in the stainless steel inner lining at steel pipe two ends and its length of outer sleeve shortest length that high temperature can not destroy the corrosion-inhibiting coating performance during by welding determine, be generally 40-70mm.
3, by the inside and outside patch technology of exempting from of claim 1 or 2 regulations, it is characterized in that in the stainless steel inner lining and outer sleeve wall thickness δ=1.3-1.5mm.
4, by the inside and outside patch technology of exempting from of claim 1 or 2 regulations, it is characterized in that the inner end that reaches outer sleeve in the stainless steel inner lining is 30 ° of acute angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110521 CN1110385A (en) | 1994-04-07 | 1994-04-07 | Antiseptic steel pipe technology non-repairing inner and outer orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110521 CN1110385A (en) | 1994-04-07 | 1994-04-07 | Antiseptic steel pipe technology non-repairing inner and outer orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1110385A true CN1110385A (en) | 1995-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94110521 Pending CN1110385A (en) | 1994-04-07 | 1994-04-07 | Antiseptic steel pipe technology non-repairing inner and outer orifice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1110385A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733241A (en) * | 2010-01-15 | 2010-06-16 | 孙天明 | Stepped coating repairing method for corrugated steel web plate |
| CN107971606A (en) * | 2016-11-07 | 2018-05-01 | 中国石油集团工程技术研究院 | A kind of pre- jointing method of steel pipe weld bond |
| CN110081242A (en) * | 2019-04-15 | 2019-08-02 | 重庆鼎久管道有限公司 | A kind of two metal solder plastic coated composite steel pipe |
| 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 |
-
1994
- 1994-04-07 CN CN 94110521 patent/CN1110385A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733241A (en) * | 2010-01-15 | 2010-06-16 | 孙天明 | Stepped coating repairing method for corrugated steel web plate |
| CN101733241B (en) * | 2010-01-15 | 2013-04-17 | 浙江中隧桥波形钢腹板有限公司 | Stepped coating repairing method for corrugated steel web plate |
| CN107971606A (en) * | 2016-11-07 | 2018-05-01 | 中国石油集团工程技术研究院 | A kind of pre- jointing method of steel pipe weld bond |
| CN107971606B (en) * | 2016-11-07 | 2020-01-31 | 中国石油集团工程技术研究院 | Pre-joint coating method for welded joints of steel pipes |
| CN110081242A (en) * | 2019-04-15 | 2019-08-02 | 重庆鼎久管道有限公司 | A kind of two metal solder plastic coated composite steel pipe |
| 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 |
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