CN101660647B - Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology - Google Patents
Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology Download PDFInfo
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- CN101660647B CN101660647B CN200910176740XA CN200910176740A CN101660647B CN 101660647 B CN101660647 B CN 101660647B CN 200910176740X A CN200910176740X A CN 200910176740XA CN 200910176740 A CN200910176740 A CN 200910176740A CN 101660647 B CN101660647 B CN 101660647B
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- intermediate frequency
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- 238000005516 engineering process Methods 0.000 title claims abstract description 21
- 239000011248 coating agent Substances 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 title claims abstract description 17
- 239000002689 soil Substances 0.000 title claims abstract description 14
- 238000005260 corrosion Methods 0.000 title claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000004927 fusion Effects 0.000 claims abstract description 8
- 229920002635 polyurethane Polymers 0.000 claims abstract description 7
- 239000004814 polyurethane Substances 0.000 claims abstract description 7
- 238000005488 sandblasting Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 4
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000004078 cryogenic material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000007734 materials engineering Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
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- Pipe Accessories (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention discloses an ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology, being applicable to the manufacturing of a composite anti-corrosion heat-insulating pipeline joint coating in severe cold districts. The technology comprises the following steps: (1) preheating an intermediate frequency sensor at the joint part of pipelines; (2) carrying out sand blasting at the joint part of pipelines; (3) carrying out joint coating on a heat-shrinkable band; (4) adhering a polyurethane casing; (5) carrying out fusion welding on the sleeve; (6) reinforcing the circular seam sacrificial cover; and (7) heating the intermediate frequency sensor. The technology has simple and convenient manufacturing process, solves the technical problems in the construction of low temperature cold shortness, low temperature heat insulation and low temperature joint coating of pipelines in severe cold districts, and has the effects of low temperature cold contraction resistance, high temperature heat expansion resistance, anticorrosion, heat preservation and the like.
Description
Technical field
The present invention relates to the preparation process of oil field conveyance conduit, specifically a kind of Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology.
Background technique
Anticorrosion, insulation pipe follows human society to utilize the development of petroleum resources, and its product category, product structure are ripe day by day.The long distance pipeline both at home and abroad product type is divided into anticorrosion and insulation, and service condition is divided into low temperature and middle high temperature, and system of laying has built on stilts and buries ground.Long distance pipeline material commonly used has: three-decker polyethylene (3PE), urethane foam thermal insulation pipe etc.Material and process engineering be seriation, standardization all.Be characterized in: use the normal temperature material, repaired mouth and in normal temperature environment, using under the normal temperature process conditions; External existing low temperature field joints coating technology repaired mouth temperature also is to be higher than more than-20 ℃ to use.Yet need winter construction in the permafrost zone, ambient temperature for found the factory in-45 ℃ strange land, winter prefabricated corrosion-resistanting insulation pipe, the frozen soils structure complexity of passing through, corrosion-resistanting insulation pipe will pass through the permafrost soil layer when ambient temperature is-45 ℃, guarantee that frozen soil does not subside, pipeline does not have distortion, will overcome the pipeline brittle fracture under low temperature and take partial insulation, heat insulation, can on-the-spot bonding measure make repaired mouth, environmental requirement is higher than general international standard, therefore uses the repaired mouth structure fabrication technology under the existing normal temperature condition to be difficult to adapt to such low temperature environment requirements of one's work.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly can produce the Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology that satisfies construction technical requirement at extremely frigid zones.This technology can solve that extremely frigid zones pipeline brittle fracture under low temperature, low temperature are heat insulation, the technical barrier in the low temperature field joint construction.
The technical solution adopted in the present invention is: the technology of this Ever frozen soil anti-corrosion heat-insulating pipeline joint coating comprises the following steps:
1. pipe joint place intermediate frequency inductor preheating: temperature is+50 ℃～+ 70 ℃; 2. pipe joint place derusting by sandblasting: the sand grains footpath is less than 3mm; 3. pyrocondensation belt repaired mouth: epoxy primer is evenly spread upon the steel pipe partial outer surface, twine pyrocondensation belt then, with the far infrared intermediate frequency heater pyrocondensation belt is heated, heating and temperature control is at 120 ℃～140 ℃; 4. the polyurethane heat-insulation shell is bonding: with low temperature adhesive with the polyurethane shell strong bond on the pyrocondensation belt surface; 5. oversleeve fusion weldering: adopt and outer pillar equal thickness polyethylene oversleeve, by electrical heating wire pre-buried in the oversleeve and the welding of body heat fusion; 6. circumferential weld sacrifice cover reinforcement: twine pyrocondensation belt at the circumferential weld place of pipeline and oversleeve as sacrificing cover to the circumferential weld reinforcement; 7. intermediate frequency inductor heating: to sacrificing the heating of cover intermediate frequency inductor, temperature is no more than 140 ℃.
The present invention has following beneficial effect: Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology of the present invention is that ring applies the anticorrosive coat made from cryogenic material on the insulation pipe wall that composite material is made, heat-preservating shell, cover is sacrificed in oversleeve and pyrocondensation, make repaired mouth identical with the composite pipe body, has anti-low temperature shrinkage, elevated temperature heat rises, effects such as anticorrosion and insulation, the technology that is suitable for extremely frigid zones composite corrosionproof thermal insulating pipeline road repaired mouth is made requirement, it is simple to have operating process simultaneously, the characteristics of easy construction have solved extremely frigid zones pipeline brittle fracture under low temperature, low temperature is heat insulation, technical barrier in the low temperature field joint construction.
Description of drawings:
Accompanying drawing 1 is this process flow diagram;
The Ever frozen soil anti-corrosion heat-insulating pipeline joint coating of accompanying drawing 2 for utilizing this technology to make.
Cover is sacrificed in 1-insulation pipe termination 2-anticorrosive coat 3-heat-preservating shell 4-oversleeve 5-pyrocondensation among the figure
Embodiment:
The invention will be further described below in conjunction with reaching accompanying drawing embodiment:
The Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology process comprises the following steps: as shown in Figure 1
1. jointing intermediate frequency inductor preheating: in the intermediate frequency inductor preheating of the spare interface place of insulation pipe termination 1, guarantee that the repaired mouth temperature be+50 ℃～+ 70 ℃, guarantee that when carrying out next procedure pipeline is not moist, return and become rusty or dewfall;
2. derusting by sandblasting: select the silica sand of clean dried, particle diameter is less than 3mm.The sandblast position adds the case that gathers dust, and prevents silica sand ejecta pollution environment.Protection end face tarpaulin simultaneously with pipeline top layer polyethylene hacking, improves cementability before the rust cleaning.
3. pyrocondensation belt repaired mouth: it is anticorrosion evenly to smear epoxy primer on the pipe surface outer wall of hacking, twine pyrocondensation belt then jointly as anticorrosive coat 2, with the far infrared intermediate frequency heater pyrocondensation belt is heated, heating and temperature control is at 120 ℃～140 ℃, make it softening also, quicken the priming paint heat cure.
4. the polyurethane heat-insulation shell is bonding: with low temperature adhesive with polyurethane heat-insulation shell 3 strong bond on softening pyrocondensation belt surface, and smear binder at seam crossing, play the effect of further insulation.
5. oversleeve fusion weldering: will be enclosed within the surface of heat-preservating shell 3 with the polyethylene oversleeve 4 of the outer pillar equal thickness of pipeline, by electrical heating wire pre-buried in the oversleeve 4 and pipeline thermal fusion welding.
6. circumferential weld sacrifice cover reinforcement: twine pyrocondensation belt at the circumferential weld place of pipeline and oversleeve 4 again and carry out reinforcement as sacrificing 5 pairs of circumferential welds of cover;
7. intermediate frequency inductor heating: to sacrificing the heating of cover intermediate frequency inductor, temperature is no more than 140 ℃, makes itself and polyethylene oversleeve and tube wall bonding.
Utilize Ever frozen soil anti-corrosion heat-insulating pipeline joint coating structure that this technology makes as shown in Figure 2.This technology provides a kind of field joints coating technology of anticorrosion, heat-preserving composite pipeline.Because of the length in pipeline working life directly is subjected to anticorrosive coat quality and Effect on Performance, therefore correct to select suitable anticorrosive coat be the key of decision pipeline bulk life time.For finish the field joints coating technology operation smoothly at extremely frigid zones, at first select low temperature opening-supplementing material such as epoxy primer to twine the anticorrosive coat of pyrocondensation belt outward; Next takes partial insulation measure such as intermediate frequency preheating and far infrared preheating, guarantees the repaired mouth temperature; Be then in the heat-insulation and heat-preservation room of making in advance, implement the repaired mouth operation, guarantee that heating is harmless to thermal insulation layer; In order to increase work efficiency, adopt the prefabrication heat-preservating shell, on-the-spot bonding; Use the corrosion-resistant thermal insulation performance that improves pipeline integral body with polyethylene oversleeve, polyethylene heat fusion weld-bonding, the circumferential weld sacrifice cover reinforcement combination technique of outer pillar equal thickness, make repaired mouth identical with the composite pipe body, have effects such as anti-low temperature shrinkage, high temperature heat expansion, anticorrosion and insulation, the technology that is applicable to extremely frigid zones composite corrosionproof thermal insulating pipeline road repaired mouth is made requirement, operating process simple, easy construction has solved that extremely frigid zones conveyance conduit brittle fracture under low temperature, low temperature are heat insulation, the technical barrier in the low temperature field joint construction.
Claims (1)
1. Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology comprises the following steps:
1. pipe joint place intermediate frequency inductor preheating: temperature is+50 ℃～+ 70 ℃;
2. pipe joint place derusting by sandblasting: the sand grains footpath is less than 3mm;
3. pyrocondensation belt repaired mouth: epoxy primer is evenly spread upon the steel pipe partial outer surface, twine pyrocondensation belt then, with the far infrared intermediate frequency heater pyrocondensation belt is heated, heating and temperature control is at 120 ℃～140 ℃;
4. the polyurethane heat-insulation shell is bonding: with low temperature adhesive with polyurethane heat-insulation shell strong bond on the pyrocondensation belt surface;
5. oversleeve fusion weldering: adopt and outer pillar equal thickness polyethylene oversleeve, by electrical heating wire pre-buried in the oversleeve and the welding of body heat fusion;
6. circumferential weld sacrifice cover reinforcement: twine pyrocondensation belt at the circumferential weld place of pipeline and oversleeve as sacrificing cover to the circumferential weld reinforcement;
7. intermediate frequency inductor heating: to sacrificing the heating of cover intermediate frequency inductor, temperature is no more than 140 ℃.
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| CN200910176740XA CN101660647B (en) | 2009-09-21 | 2009-09-21 | Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology |
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| CN200910176740XA CN101660647B (en) | 2009-09-21 | 2009-09-21 | Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology |
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| CN101660647A CN101660647A (en) | 2010-03-03 |
| CN101660647B true CN101660647B (en) | 2011-03-30 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679086A (en) * | 2011-03-18 | 2012-09-19 | 中国石油天然气集团公司 | Intermediate-frequency heating repaired opening construction technology for thermal contraction band of buried steel pipeline |
| CN102996973A (en) * | 2011-09-13 | 2013-03-27 | 胜利油田胜利石油化工建设有限责任公司 | Joint coating process for outer protective foam insulated pipe of fiber reinforced plastic (FRP) |
| CN102518909A (en) * | 2011-12-28 | 2012-06-27 | 中国石油天然气股份有限公司 | Method for repairing large-diameter long-distance pipeline in high and cold frozen soil area |
| CN103574218B (en) * | 2012-07-26 | 2015-12-02 | 中国石油天然气集团公司 | A kind of pipeline thermal necked material field joints coating technology |
| CN103062575A (en) * | 2013-01-24 | 2013-04-24 | 林泊成 | Heat-insulation joint coating process for underground oil and gas pipelines in high and cold regions |
| WO2016095765A1 (en) * | 2014-12-17 | 2016-06-23 | 四川金发科技发展有限公司 | Pipeline joint coating structure and pipeline joint coating method therefor |
| CN105351673A (en) * | 2015-12-08 | 2016-02-24 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Polyurethane thermal insulation pipe straight pipe plate type field joint device and field joint thermal insulation method |
| CN105465504B (en) * | 2015-12-23 | 2017-06-16 | 山东鼎超供热设备有限公司 | The live interface method of mould set steel hot water pipeline under a kind of low temperature environment |
| CN107255207B (en) * | 2017-08-10 | 2018-07-10 | 四川久远科技股份有限公司 | A kind of Pipeline joint anticorrosion winding band and construction method |
| CN110919216A (en) * | 2019-11-26 | 2020-03-27 | 中国电建集团山东电力建设第一工程有限公司 | Corrosion prevention method for welding of grounding wire of thermal power plant in saline-alkali area |
| CN114216001B (en) * | 2021-11-24 | 2024-03-29 | 中投(天津)智能管道股份有限公司 | Insulation construction process suitable for joint of directional drilling section heat insulation pipeline in alpine region |
| CN114198596B (en) * | 2021-11-24 | 2024-02-13 | 中投(天津)智能管道股份有限公司 | Thermal insulation construction process suitable for pipeline joint under extremely cold weather |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597141A (en) * | 2004-09-27 | 2005-03-23 | 大庆油田建设集团 | Insulating pipeline spray coating opening mending method |
| CN101368660A (en) * | 2008-10-16 | 2009-02-18 | 吴发东 | Mouth compensating method for pipeline corrosion protection layer and integrated mouth compensating machine |
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2009
- 2009-09-21 CN CN200910176740XA patent/CN101660647B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597141A (en) * | 2004-09-27 | 2005-03-23 | 大庆油田建设集团 | Insulating pipeline spray coating opening mending method |
| CN101368660A (en) * | 2008-10-16 | 2009-02-18 | 吴发东 | Mouth compensating method for pipeline corrosion protection layer and integrated mouth compensating machine |
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| CN101660647A (en) | 2010-03-03 |
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Effective date of registration: 20220113 Address after: 163453 Heilongjiang province Daqing City Ranghulu District No. 233 South Street, Central Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: PetroChina Company Limited Address before: 163453 Heilongjiang province Daqing City Ranghulu District No. 233 South Street, Central Patentee before: Daqing Oilfield Co.,Ltd. |