CN103433192A - Coating method for coating solvent-free anti-drag coating in steel pipe - Google Patents
Coating method for coating solvent-free anti-drag coating in steel pipe Download PDFInfo
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- CN103433192A CN103433192A CN2013104134392A CN201310413439A CN103433192A CN 103433192 A CN103433192 A CN 103433192A CN 2013104134392 A CN2013104134392 A CN 2013104134392A CN 201310413439 A CN201310413439 A CN 201310413439A CN 103433192 A CN103433192 A CN 103433192A
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Abstract
The invention relates to the field of corrosion prevention of steel pipes and in particular relates to a coating method for coating solvent-free anti-drag coating in a steel pipe. The coating method is characterized by comprising three steps of derusting the inner wall, spray-coating the inner wall and performing quality inspection, and specifically comprising the operating steps: 1) performing surface treatment, wherein the anchor pattern depth is 30 to 50 microns and the cleanliness reaches above level 2; 2) preheating coating; 3) setting the volume ratio of a component A to a component B to be 2.8:1; 4) setting the air inlet pressure of a spray gun to be 3.5 to 4.0 kg/cm<2>; 5) performing heat tracing on the steel pipe, so that the temperature of the pipe body is not lower than 50 DEG C; 6) adjusting the rotating speed of the steel pipe, wherein the rotating speed of the steel pipe is 19 to 22 revolutions per minute; 7) adjusting the forwarding/withdrawing speed of the spray gun; 8) inspecting and carrying out acceptance check according to the American Water Works Association (AWWA) C210-2003 standard. Compared with the prior art, the coating method has the beneficial effects that a coating process is improved aiming at epoxy resin environment-friendly solvent-free coating, so that operation is simple, coating efficiency is improved and market requirements can be met.
Description
Technical field
The present invention relates to the steel pipe corrosion-proof field, relate in particular to the coating process that is coated with solvent-free anti-drag paint in a kind of steel pipe.
Background technology
Anti-corrosive steel tube is used in important occasion more at present, especially particularly outstanding at aspects such as oil, chemical industry, natural gas, heat energy, water conservancy, road, bridge and water conservancies, be coated with coating in the conventional solvent type and have following shortcoming, the one, not environmental protection of formula components, have pollution to environment; Spraying after coating needs to add the dimethylbenzene equal solvent to be diluted in coating process in solvent-borne type, dimethylbenzene have smell large, inflammable, to speciality such as human body easily damage, in gunite work, workmen and surrounding environment are easily caused to very big harm.Therefore, solvent based coating can not be for the inner-wall spraying of waterline, this blank has well been filled up in the appearance of epoxy resin environment-friendly type solvent-free coating, but, due to the particularity of pipeline interior finishing, epoxy resin environment-friendly type solvent-free coating also rarely has the report for the waterline inwall at present.
Summary of the invention
The purpose of this invention is to provide the coating process that is coated with solvent-free anti-drag paint in a kind of steel pipe, for epoxy resin environment-friendly type solvent-free coating, improve coating process, make operation simpler, on the basis that guarantees painting effect, improve coating efficiency.
For solving the problems of the technologies described above, technical scheme of the present invention is:
Be coated with the coating process of solvent-free anti-drag paint in steel pipe, comprise inwall rust cleaning, inner-wall spraying and three steps of quality testing, its concrete operation step is as follows:
1) surface treatment: adopt compressed air shotblasting machine to carry out processing of rust removing to steel pipe internal-surface, depth of abrasion pattern 30～50 μ m, cleannes reach more than 2 grades;
2) coating preheating: the A component of epoxy coating is preheating to 50～60 ℃, and the B component is preheating to 30～40 ℃;
3) premixed: the volume ratio of determining A component and B component is 2.8:1;
4) spray pressure setting: selecting the spray gun model is 104231-921, spray gun air intake pressure 3.5～4.0kg/cm
2;
5) steel pipe companion heat: by steel pipe companion heat, make the body temperature be not less than 50 ℃;
6) adjust the steel pipe rotating speed: the steel pipe rotating speed is 19～22 rev/mins;
7) adjust advance and retreat spray gun speed: advancing rifle speed is 8～10 m/mins, and moving back rifle speed is 3～4 m/mins;
8) quality inspection, by the AWWA C210-2003 of U.S. water conservancy project association standard test examination.
Compared with prior art, the invention has the beneficial effects as follows: for epoxy resin environment-friendly type solvent-free coating, improved coating process, make operation simpler, on the basis that guarantees painting effect, improved coating efficiency, have that coating thickness is uniform and smooth, smooth, color evenly, without orange peel and pin hole, the advantages such as no sag, can the satisfying the market requirement.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described:
Be coated with the coating process of solvent-free anti-drag paint in steel pipe of the present invention, comprise inwall rust cleaning, inner-wall spraying and three steps of quality testing, its concrete operation step is as follows:
1) surface treatment: adopt compressed air shotblasting machine to carry out processing of rust removing to steel pipe internal-surface, depth of abrasion pattern 30～50 μ m, cleannes reach more than 2 grades; Steel tube surface, if any oil pollution, should adopt alkali cleaning equipment to carry out the steel tube surface cleaning, cleans complete check with reference to SSPC-SP1.Rust cleaning is prepared: should adopt two sand shakers, First is loaded shot, the mixture of second filling shot and steel sand, and mixed proportion is with reference to abrasive material manufacturer's recommended ratio or impregnating plant internal rules.
Depth of abrasion pattern is measured: with reference to the ISO8503-1 standard, use professional anchor line test paper and micron micrometer to carry out the depth of abrasion pattern measurement after the steel tube surface inscription rubbing, depth of abrasion pattern is 38-102 μ m, carries out respective record after measurement.
With reference to ISO8501-1:2007, steel tube surface derusting grade control board, contrasted the steel pipe after rust cleaning, requires to reach Sa2.5 closely in vain more than level after rust cleaning.With reference to the ISO8502-3:1992 standard, adopt pressure sensitive adhesive tape to be tested the steel tube surface cleannes, measure complete pressure sensitive adhesive tape and stick on the contrast plate and contrasted, take≤2 grades be criterion of acceptability.
2) coating preheating: the A component of epoxy coating is preheating to 50～60 ℃, and the B component is preheating to 30～40 ℃;
3) premixed: the volume ratio of determining A component and B component is 2.8:1;
4) spray pressure setting: selecting the spray gun model is 104231-921, spray gun air intake pressure 3.5～4.0kg/cm
2;
5) steel pipe companion heat: by steel pipe companion heat, make the body temperature be not less than 50 ℃;
6) adjust the steel pipe rotating speed: the steel pipe rotating speed is 19～22 rev/mins;
7) adjust advance and retreat spray gun speed: advancing rifle speed is 8～10 m/mins, and moving back rifle speed is 3～4 m/mins;
8) quality inspection, by the AWWA C210-2003 of U.S. water conservancy project association standard test examination.The spraying rear surface checks: surface should be evenly, without trickling, without dripping extension, without flake.With reference to solidfied material content, to the wet film after application, use wet film rule to be measured, and carry out respective record.Steel pipe after solidifying fully should be according to the test of ASTM D4752 solvent wiping) and the test method stipulated of ASTMD3363 (pencil hardness test) curing degree of anticorrosive coat is tested.
Adopt 65V wet method leak detection in NACE RP0490 standard to be hunted leak to solvent-free coating, the leak source of finding is repaired.The adhesive force test, mark v-notch with pocket knife, with point of a knife, anticorrosive coat prized to stripping, take and do not come off as criterion of acceptability.
Laboratory is detected: soak: coating, solidify the steel plate sample of a 50-mm*150-mm*3.2-mm size, seal not one side and all seams of coating with heated paraffin or other encapsulants, give the deionized water of injecting respectively 100 millimeters deep in the container of 3 suitable sizes, 1% weight portion thiosulfonic acid solution and 1% weight portion sodium hydroxide solution, by steel plate, be put into respectively in container, be immersed in liquid and liquid gas phase, if place a plurality of steel plates in a container, 25 millimeters of spacings at least between each steel plate, covered container, but not sealing, at 24 ℃ ± 1 ℃ temperature, place 30 days, the amount of liquid that keeps regulation, then take out steel plate, rinse, put and dry in 24 hours, bubble, the cracking and peeling all belong to defective.
Claims (1)
1. be coated with the coating process of solvent-free anti-drag paint in steel pipe, it is characterized in that, comprise inwall rust cleaning, inner-wall spraying and three steps of quality testing, its concrete operation step is as follows:
1) surface treatment: adopt compressed air shotblasting machine to carry out processing of rust removing to steel pipe internal-surface, depth of abrasion pattern 30～50 μ m, cleannes reach more than 2 grades;
2) coating preheating: the A component of epoxy coating is preheating to 50～60 ℃, and the B component is preheating to 30～40 ℃;
3) premixed: the volume ratio of determining A component and B component is 2.8:1;
4) spray pressure setting: selecting the spray gun model is 104231-921, spray gun air intake pressure 3.5～4.0kg/cm
2;
5) steel pipe companion heat: by steel pipe companion heat, make the body temperature be not less than 50 ℃;
6) adjust the steel pipe rotating speed: the steel pipe rotating speed is 19～22 rev/mins;
7) adjust advance and retreat spray gun speed: advancing rifle speed is 8～10 m/mins, and moving back rifle speed is 3～4 m/mins;
8) quality inspection, by the AWWA C210-2003 of U.S. water conservancy project association standard test examination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310413439.2A CN103433192B (en) | 2013-09-12 | 2013-09-12 | Coating method for coating solvent-free anti-drag coating in steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310413439.2A CN103433192B (en) | 2013-09-12 | 2013-09-12 | Coating method for coating solvent-free anti-drag coating in steel pipe |
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| CN103433192A true CN103433192A (en) | 2013-12-11 |
| CN103433192B CN103433192B (en) | 2014-12-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000846A (en) * | 2016-07-28 | 2016-10-12 | 中石化石油工程机械有限公司沙市钢管厂 | Steel tube solvent-free resistance-reducing internal layer coating method |
| CN108266579A (en) * | 2018-03-28 | 2018-07-10 | 昊天节能装备有限责任公司 | Anti-drag heat insulation pipe in a kind of high density polyvinyl polyurethane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6749894B2 (en) * | 2002-06-28 | 2004-06-15 | Surface Engineered Products Corporation | Corrosion-resistant coatings for steel tubes |
| CN103008215A (en) * | 2012-11-28 | 2013-04-03 | 北京羽林军石油科技有限公司 | Method for spraying bicomponent modified epoxy resin with 100 percent solid content on inner wall of steel pipe |
-
2013
- 2013-09-12 CN CN201310413439.2A patent/CN103433192B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6749894B2 (en) * | 2002-06-28 | 2004-06-15 | Surface Engineered Products Corporation | Corrosion-resistant coatings for steel tubes |
| CN103008215A (en) * | 2012-11-28 | 2013-04-03 | 北京羽林军石油科技有限公司 | Method for spraying bicomponent modified epoxy resin with 100 percent solid content on inner wall of steel pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000846A (en) * | 2016-07-28 | 2016-10-12 | 中石化石油工程机械有限公司沙市钢管厂 | Steel tube solvent-free resistance-reducing internal layer coating method |
| CN108266579A (en) * | 2018-03-28 | 2018-07-10 | 昊天节能装备有限责任公司 | Anti-drag heat insulation pipe in a kind of high density polyvinyl polyurethane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103433192B (en) | 2014-12-17 |
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Effective date of registration: 20230705 Address after: South Area, 1st Floor, Building 4, No. 1438 Jinshao Road, Baoshan District, Shanghai, 200000 Patentee after: Shanghai Yiyou New Energy Technology Co.,Ltd. Address before: 114039 Anshan province Liaoning City mountain building materials Street No. 101 Patentee before: ANSHAN HIDLONG ANTI-CORROSION ENGINEERING Co.,Ltd. |