CN1434237A - Prefabricating technology for polyurethane epoxy resin anticorrosion heat-insulation pipe - Google Patents
Prefabricating technology for polyurethane epoxy resin anticorrosion heat-insulation pipe Download PDFInfo
- Publication number
- CN1434237A CN1434237A CN 02144891 CN02144891A CN1434237A CN 1434237 A CN1434237 A CN 1434237A CN 02144891 CN02144891 CN 02144891 CN 02144891 A CN02144891 A CN 02144891A CN 1434237 A CN1434237 A CN 1434237A
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- China
- Prior art keywords
- districts
- pipe
- polyurethane
- corrosion
- epoxy resin
- 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.)
- Pending
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- 238000009413 insulation Methods 0.000 title claims abstract description 24
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 12
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 12
- 239000004814 polyurethane Substances 0.000 title abstract description 5
- 229920002635 polyurethane Polymers 0.000 title abstract description 5
- 238000005516 engineering process Methods 0.000 title description 3
- 238000005260 corrosion Methods 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000004593 Epoxy Substances 0.000 claims abstract description 18
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 6
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 230000002950 deficient Effects 0.000 claims description 2
- 238000010410 dusting Methods 0.000 claims description 2
- 238000005243 fluidization Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 238000010186 staining Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 239000010779 crude oil Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 238000009417 prefabrication Methods 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000003345 natural gas Substances 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The utility model provides a polyurethane epoxy anticorrosion insulating tube prefabrication technique, at first after the epoxy powder outer spraying is accomplished, the rethread feeder is with its conveying polyurethane foam jacket production line of carrying out the construction prefabrication, and its concrete process includes: (1) and inspecting the steel pipe; (2) preheating for derusting; (3) intermediate frequency heating; (4) FBE spraying; (5) intermediate frequency preheating; (6) water cooling and shaping; the invention adopts the six procedures, thereby realizing the one-time production of the polyurethane epoxy resin anti-corrosion heat-insulation pipe. The anticorrosion heat-insulation form has the effects of anticorrosion and heat insulation, and the epoxy powder anticorrosion pipe has extremely strong corrosion resistance, and the polyurethane heat-insulation layer has good heat-insulation effect, can resist the corrosion of severe cold, high temperature, chemical media, moist saline-alkali zones and water quality, is suitable for conveying various crude oil, natural gas and chemical liquid in rivers, marshes, gobi beaches, shallow seas and other places, and has high popularization value.
Description
The present invention relates to a kind of new method for prefabricating of pipeline corrosion protection field of thermal insulation, particularly a kind of polyurethane-epoxy resin anti-corrosion heat insulation pipe prefabricating technique.
Utilizing the outer spraying technology of polyurethane foam production corrosion-resistant thermal insulation Manifold technology and clinkery epoxy powder anticorrosion is the at present domestic and international prefabricated major technique of steel pipe corrosion-proof.Though the epoxy powder anti-corrosion pipe has extremely strong corrosion resistance, the polyurethane foam clamp also has thermal insulation property preferably, but the two all has significant limitation, and the epoxy powder anti-corrosion pipe does not have insulation effect, the corrosion resistance of polyurethane foam clamp is relatively poor, has brought difficulty to use.
The objective of the invention is to be to break through the narrow limitation that in the past only adopts jacket pipe corrosion-resistant thermal insulation or epoxy powder anticorrosion with painting technically, the two is integrated, thereby strengthen the corrosion resistance and the heat insulating ability of pipeline for pipeline corrosion protection.
The object of the present invention is achieved like this, after at first the outer spraying of epoxy powder being finished, is sent to polyurethane foam end jacket production line by feedback line again and constructs prefabricated.Its concrete operation is as follows:
(1), steel pipe check: the steel pipe examination requirements is checked the situations such as greasy dirt, pipe body corrosion and mouth of pipe ellipse of steel tube surface, in time writes down and handles.
(2), preheating rust cleaning, floating dust are handled, polish, purge, eliminated rust and check: the preceding steel pipe preheating temperature of rust cleaning requires to reach 40 and spends, derusting grade requires to reach the Sa2.5 level, will carry out floating dust to steel pipe after rust cleaning handles, inside purges, burr rust staining etc. is located to polish, and rust cleaning examination requirements depth of abrasion pattern is between 40-100um.
(3), heating in medium frequency: enter the heating of heating in medium frequency stove, make the steel tube surface temperature reach the needed heating-up temperature of FBE, cooling water temperature does not allow above 35 ℃.
(4), FBE spraying: guarantee the powder spraying quality during epoxy powder spraying, through the water quench typing, coating thickness and electrical spark detect will reach standard-required, and defective pipe will be repaired the standard of reaching.
(5), intermediate frequency preheating: forward the epoxy powder anti-corrosion pipe to the urethane foam production line through feedback line, the steel pipe preheating temperature reaches 40 ℃, once moulding on the urethane foam production line.
(6), water-cooled shaping: through cooling and shaping, the polyurethane-epoxy resin anti-corrosion heat insulation pipe is produced after handling in the termination.
The present invention has realized the disposable production of polyurethane-epoxy resin anti-corrosion heat insulation pipe owing to adopted above-mentioned six procedures.This kind corrosion-resistant thermal insulation form has anticorrosion and heat preservation effect simultaneously, because the epoxy powder anti-corrosion pipe has extremely strong corrosion resistance, polyurethane insulation coating has good heat insulation effect again, can stand severe cold, high temperature, chemical mediator and moist saline and alkaline area and water quality corrosion, be applicable in locations such as rivers, marsh, Gobi desert, shallow seas and carry various crude oil, rock gas and chemical liquid, have stronger promotional value.
Embodiment 1:
(1), steel pipe check is the key factor that guarantees quality of product, requires to check the situations such as greasy dirt, pipe body corrosion and mouth of pipe ellipse of steel tube surface, in time write down and process.
(2), preheating rust cleaning: the steel pipe preheating temperature requires to reach 40 ℃ before the rust cleaning; After carrying out impeller blasting, derusting grade requires to reach the Sa2.5 level; Rust cleaning examination requirements steel pipe depth of abrasion pattern is between 40-100um.
(3), heating in medium frequency: enter the heating of heating in medium frequency stove, make the steel tube surface temperature reach the needed heating-up temperature of epoxy powder.
(4), FBE spraying: individual layer epoxy powder spraying (technical parameter)
Powder bed thickness: 300-500um spray pressure: 0.7bar
Fluidisation pressure: the 1.5bar spray gun amount of dusting: 5.5m
3/ h
High-pressure electrostatic: 30kv
(5), intermediate frequency preheating: forward the epoxy powder anti-corrosion pipe to the urethane foam production line through feedback line, extruder is respectively distinguished temperature: 170 ℃ in 1 district, 190 ℃ in 2 districts, 220 ℃ in 3 districts, 230 ℃ in 4 districts, 250 ℃ in 5 districts, 250 ℃ in 6 districts, 260 ℃ in 7 districts.
(6), water-cooled shaping: through cooling and shaping, the termination processing requirements is the tube head of 150mm in steel pipe two ends length in reserve, so that welding.The back forms the polyurethane-epoxy resin anti-corrosion heat insulation pipe.
Embodiment 2: the reduction spray pressure is 0.5bar, and the reduction high-pressure electrostatic is 25kv, and other process conditions are identical with example 1.
Embodiment 3: it is 150 ℃ in 1 district, 170 ℃ in 2 districts, 210 ℃ in 3 districts, 220 ℃ in 4 districts, 240 ℃ in 5 districts, 250 ℃ in 6 districts, 250 ℃ in 7 districts that the reduction extruder is respectively distinguished temperature, and other process conditions are identical with example 1.
Claims (4)
1, a kind of polyurethane-epoxy resin anti-corrosion heat insulation pipe prefabricating technique after at first the outer spraying of epoxy powder being finished, is sent to polyurethane foam end jacket production line by feedback line again and constructs prefabricatedly, and it is characterized in that: its concrete operation is as follows:
(1), steel pipe check: the steel pipe examination requirements is checked the situations such as greasy dirt, pipe body corrosion and mouth of pipe ellipse of steel tube surface, in time writes down and handles.
(2), preheating rust cleaning, floating dust are handled, polish, purge, eliminated rust and check: the preceding steel pipe preheating temperature of rust cleaning requires to reach 40 and spends, derusting grade requires to reach the Sa2.5 level, will carry out floating dust to steel pipe after rust cleaning handles, inside purges, burr rust staining etc. is located to polish, and rust cleaning examination requirements depth of abrasion pattern is between 40-100um.
(3), heating in medium frequency: enter the heating of heating in medium frequency stove, make the steel tube surface temperature reach the needed heating-up temperature of FBE, cooling water temperature does not allow above 35 ℃.
(4), FBE spraying: guarantee the powder spraying quality during epoxy powder spraying, through the water quench typing, coating thickness and electrical spark detect will reach standard-required, and defective pipe will be repaired the standard of reaching.
(5), intermediate frequency preheating: forward the epoxy powder anti-corrosion pipe to the urethane foam production line through feedback line, the steel pipe preheating temperature reaches 40 ℃, once moulding on the urethane foam production line.
(6), water-cooled shaping: through cooling and shaping, the polyurethane-epoxy resin anti-corrosion heat insulation pipe is produced after handling in the termination.
2, polyurethane-epoxy resin anti-corrosion heat insulation pipe prefabricating technique according to claim 1 is characterized in that: individual layer epoxy powder spraying (technical parameter)
Powder bed thickness: 300-500um spray pressure: 0.7bar
Fluidisation pressure: the 1.5bar spray gun amount of dusting: 5.5m
3/ h
High-pressure electrostatic: 30kv
Temperature is respectively distinguished in intermediate frequency preheating, extruder: 170 ℃ in 1 district, 190 ℃ in 2 districts, 220 ℃ in 3 districts, 230 ℃ in 4 districts, 250 ℃ in 5 districts, 250 ℃ in 6 districts, 260 ℃ in 7 districts.
3, polyurethane-epoxy resin anti-corrosion heat insulation pipe prefabricating technique according to claim 1, it is characterized in that: the reduction spray pressure is 0.5bar, the reduction high-pressure electrostatic is 25kv.
4, according to the described polyurethane-epoxy resin anti-corrosion heat insulation pipe of claim 1 prefabricating technique, it is characterized in that: it is 150 ℃ in 1 district, 170 ℃ in 2 districts, 210 ℃ in 3 districts, 220 ℃ in 4 districts, 240 ℃ in 5 districts, 250 ℃ in 6 districts, 250 ℃ in 7 districts that the reduction extruder is respectively distinguished temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144891 CN1434237A (en) | 2002-11-19 | 2002-11-19 | Prefabricating technology for polyurethane epoxy resin anticorrosion heat-insulation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144891 CN1434237A (en) | 2002-11-19 | 2002-11-19 | Prefabricating technology for polyurethane epoxy resin anticorrosion heat-insulation pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1434237A true CN1434237A (en) | 2003-08-06 |
Family
ID=27628683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02144891 Pending CN1434237A (en) | 2002-11-19 | 2002-11-19 | Prefabricating technology for polyurethane epoxy resin anticorrosion heat-insulation pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1434237A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505804A (en) * | 2011-11-11 | 2012-06-20 | 江阴市华金交通建材有限公司 | Manufacturing method of epoxy resin-coated hoop for building |
| CN102896786A (en) * | 2012-09-13 | 2013-01-30 | 安徽省宏源管道科技有限公司 | Powder interior repairing machine and repairing method thereof |
| CN108787264A (en) * | 2018-05-02 | 2018-11-13 | 中国石油天然气集团公司 | Welding epoxy coating antisepsis production line and anticorrosion process in a kind of welded still pipe |
-
2002
- 2002-11-19 CN CN 02144891 patent/CN1434237A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505804A (en) * | 2011-11-11 | 2012-06-20 | 江阴市华金交通建材有限公司 | Manufacturing method of epoxy resin-coated hoop for building |
| CN102896786A (en) * | 2012-09-13 | 2013-01-30 | 安徽省宏源管道科技有限公司 | Powder interior repairing machine and repairing method thereof |
| CN102896786B (en) * | 2012-09-13 | 2015-07-22 | 安徽省宏源管道科技有限公司 | Powder interior repairing machine and repairing method thereof |
| CN108787264A (en) * | 2018-05-02 | 2018-11-13 | 中国石油天然气集团公司 | Welding epoxy coating antisepsis production line and anticorrosion process in a kind of welded still pipe |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |