CN201273399Y - Straight joint steel pipe with anti-corrosion coating used for producing long-distance pipeline - Google Patents
Straight joint steel pipe with anti-corrosion coating used for producing long-distance pipeline Download PDFInfo
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- CN201273399Y CN201273399Y CNU2008201228532U CN200820122853U CN201273399Y CN 201273399 Y CN201273399 Y CN 201273399Y CN U2008201228532 U CNU2008201228532 U CN U2008201228532U CN 200820122853 U CN200820122853 U CN 200820122853U CN 201273399 Y CN201273399 Y CN 201273399Y
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Abstract
A straight joint steel tube with an anticorrosive coating for manufacturing long-output pipelines is characterized in that an epoxy internal anti-drag coating is covered at the internal surface of an X 80 straight joint steel tube, an epoxy powder coating, an adhesive layer and a polythene layer are sequentially coated on the external surface of the X 80 straight joint steel tube, two ends of the steel tube have a bevel and a welding preformed section, the thickness of the epoxy internal anti-drag coating is between 70 and 90 mum, the thickness of the epoxy powder coating is between 120 and 180 mum, the thickness of the adhesive layer is between 170 and 250 mum, the thickness of the polythene layer is between 3.0 and 4.3 mm, and two ends of the X 80 straight joint steel tube have the bevel and the welding preformed section. The beneficial effects are that in the range between 170 and 200 DEG C, three layers of polythene anticorrosive coating are covered on the external wall of the X 80 straight joint steel tube, which has the good anticorrosive performance. The manufacturing process plays a less influence to the dynamic performance of the X 80 straight joint steel tube, the influence of utilization and safety to pipelines is less, the manufacturing process is simple, the steel tube preheated temperature is low, and the energy is saved.
Description
Technical field
The utility model relates to the oil transport pipeline technical field, and the X80 steel pipes with straight of particularly a kind of (170～200 ℃) at a lower temperature coating three-layer polyethylene anticorrosive coats (3PE) can be made long distance oil pipeline after the welding.
Background technique
Before the existing 3PE anticorrosive coat coating, use Frequency Induction Heating, make the steel tube surface temperature reach 200～250 ℃, and be solidificated in its inner wall surface after using the epoxy powder fusing.Some key projects of China, as the two wires pipework of transferring natural gas from the west to the east, to adopt the X80 steel pipes with straight, this pipeline can produce significantly influence to the yield strength and the yield ratio of steel pipe in the heating-up temperature more than 200 ℃, cause yield ratio significantly to rise, ballistic work, toughness, the ductility of high tensile steel is all had bad influence.
The model utility content
The purpose of this utility model is: a kind of steel pipes with straight that has anticorrosive coat that is used to make long distance pipeline is provided, be coated with drag reduction coating in the epoxy at X80 steel pipes with straight internal surface, outer surface is coated with FBE, adhesive layer and polyethylene layer successively, temperature only applies in 170～200 ℃ of scopes, less to X80 steel pipes with straight mechanical property influence, have the manufacturing long distance pipeline of superior antiseptic property.The obvious influence of avoiding existing high temperature coated technology that X80 steel pipes with straight mechanical property is produced.
The technical solution adopted in the utility model is: be used to make the steel pipes with straight that has anticorrosive coat of long distance pipeline, mainly comprise the X80 steel pipes with straight, the nominal diameter of X80 steel pipes with straight is 1219mm, and length is 9000～11000mm, thickness 18～22mm.It is characterized in that: the internal surface at the X80 steel pipes with straight is coated with drag reduction coating in the epoxy.Outer surface at the X80 steel pipes with straight is coated with FBE, adhesive layer and polyethylene layer successively; The two ends of X80 steel pipes with straight have groove and welding to reserve section.The drag reduction coating thickness is between 70～90 μ m in the epoxy, and the thickness of FBE is between 120～180 μ m, and FBE is in 170～200 ℃ of coatings and curing.The thickness of adhesive layer is between 170～250 μ m, and the thickness of polyethylene layer is between 3.0～4.3mm.There is groove at two ends at the X80 steel pipes with straight, and the angle of groove has welding to reserve section at the two ends of steel pipes with straight between 10～30 °, and welding is reserved the length of section between 100～150mm.
Be used to make the steel pipes with straight that has anticorrosive coat of long distance pipeline preferably, the nominal diameter of the X80 steel pipes with straight of employing is 1219mm, thickness 22mm, length 10000mm.The thickness of drag reduction coating is 75 μ m in the epoxy that applies; The thickness of FBE is to apply FBE under 190 ± 5 ℃ of conditions in temperature between 130～150 μ m; Adhesive layer thickness is between 170～190 μ m, and the thickness of polyethylene layer is between 3.0～3.4 μ m, and the angle of groove is 15 °, and the length that section is reserved in welding is 120mm.
The manufacture process of the 3PE anticorrosive coat X80 steel pipes with straight of manufacturing long distance pipeline of the present utility model is as follows: drag reduction coating in the spraying epoxy after the derusting by sandblasting of X80 steel pipes with straight internal surface, with the derusting by sandblasting of X80 steel pipes with straight outer surface to the Sa2.5 level, depth of abrasion pattern is between 50～90 μ m, two ends will be welded with kraft paper and be reserved the section covering, adopt Medium frequency induction that the X80 steel pipes with straight is heated to 170～200 ℃, outer surface at the X80 steel pipes with straight sprays FBE successively, adhesive layer and polyethylene layer, be water-cooled to below 60 ℃, remove the kraft paper that section surface is reserved in welding, adopt wire brush that pipe ends is repaiied groove, remove the coating residue that section surface is reserved in welding.
The beneficial effects of the utility model: the steel pipes with straight that has anticorrosive coat that the utility model is used to make long distance pipeline has the following advantages:
1. in 170～200 ℃ of scopes, the X80 steel pipes with straight in that X80 steel pipes with straight outer wall coating three-layer polyethylene anticorrosive coat (3PE) is made has good Corrosion Protection, can satisfy the antiseptic property requirement of long distance pipeline.
2. manufacture process is less to the mechanical property influence of X80 steel pipes with straight, and less to pipeline influence safe in utilization, manufacturing process is simple, and the steel pipe preheating temperature is low, conserve energy.
Description of drawings
Fig. 1 is the steel pipes with straight structural profile schematic representation that has anticorrosive coat that the utility model is used to make long distance pipeline.
Fig. 2 is the schematic cross section of Fig. 1.
Among the figure, 1.X80 steel pipes with straight, 2. drag reduction coating in the epoxy, 3. FBE, 4. adhesive layer, 5. polyethylene layer, 6. groove, 7. welding reservation section.
Embodiment
Embodiment 1: with a steel pipes with straight that has anticorrosive coat that is used to make long distance pipeline is example, and the utility model is described in further detail.
Consult Fig. 1.Be used to make the steel pipes with straight that has anticorrosive coat of long distance pipeline, the nominal diameter of the X80 steel pipes with straight 1 of employing is 1219mm, and thickness is 22mm, and length is 10000mm.Drag reduction coating 2 thickness are 70 μ m in the epoxy of the internal surface of X80 steel pipes with straight 1 spraying.
Spraying FBE 3 thickness successively at the outer surface of X80 steel pipes with straight 1 is 130 μ m, and the thickness of adhesive layer 4 is 180 μ m, and the thickness of polyethylene layer 5 is 3.2mm.FBE 3 sprays in 185～195 ℃ of temperature ranges and solidifies and forms.
Angle at the groove 6 at the two ends of X80 steel pipes with straight 1 is 15 °, and the length of reserving section 7 in the welding at the two ends of X80 steel pipes with straight 1 is 120mm.
The steel pipes with straight that has anticorrosive coat that is used to make long distance pipeline has following performance: anticorrosive coating peeling intensity is (20 ℃) 184N/cm, cathodic disbonding (65 ℃ 48h) are 1.3mm, (65 ℃ of cathodic disbondings, 28d) be 13.4mm, counter-bending (30 ℃, 2.5 °) coating flawless.
Claims (2)
1, a kind of steel pipes with straight that has anticorrosive coat that is used to make long distance pipeline, mainly comprise X80 steel pipes with straight (1), the nominal diameter of X80 steel pipes with straight (1) is 1219mm, length is 9000～11000mm, thickness 18～22mm, it is characterized in that: the internal surface at X80 steel pipes with straight (1) is coated with drag reduction coating (2) in the epoxy, at the outer surface of X80 steel pipes with straight (1) FBE (3), adhesive layer (4) and polyethylene layer (5) is arranged successively; The two ends of steel pipe have groove (6) and welding to reserve section (7), drag reduction coating (2) thickness is between 70～90 μ m in the described epoxy, the thickness of FBE (3) is between 120～180 μ m, the thickness of adhesive layer (4) is between 170～250 μ m, the thickness of polyethylene layer (5) is between 3.0～4.3mm, at the two ends of X80 steel pipes with straight (1) groove (6) is arranged, the angle of groove (6) is between 10～30 °, have welding to reserve section (7) at the two ends of X80 steel pipes with straight (1), welding is reserved the length of section (7) between 100～150mm.
2, the steel pipes with straight that has anticorrosive coat that is used to make long distance pipeline according to claim 1, it is characterized in that: the nominal diameter of X80 steel pipes with straight (1) is 1219mm, thickness 22mm, the thickness of drag reduction coating (2) is 75 μ m in the length 10000mm, epoxy; The thickness of FBE (3) is between 130～150 μ m, adhesive layer (4) thickness is between 170～190 μ m, the thickness of polyethylene layer (5) is between 3.0～3.4 μ m, and the angle of groove (6) is 15 °, and the length that section (7) is reserved in welding is 120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201228532U CN201273399Y (en) | 2008-10-08 | 2008-10-08 | Straight joint steel pipe with anti-corrosion coating used for producing long-distance pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201228532U CN201273399Y (en) | 2008-10-08 | 2008-10-08 | Straight joint steel pipe with anti-corrosion coating used for producing long-distance pipeline |
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| Publication Number | Publication Date |
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| CN201273399Y true CN201273399Y (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201228532U Expired - Lifetime CN201273399Y (en) | 2008-10-08 | 2008-10-08 | Straight joint steel pipe with anti-corrosion coating used for producing long-distance pipeline |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929155A (en) * | 2010-08-30 | 2010-12-29 | 浙江中隧桥波形钢腹板有限公司 | Heavy-duty anticorrosion protection process of hollow steel pipe pile |
| CN104653947A (en) * | 2014-04-29 | 2015-05-27 | 郝连国 | Preparation method for steel pipe fitting with anticorrosive layer |
| CN109210282A (en) * | 2018-10-23 | 2019-01-15 | 山东禹王管业有限公司 | A kind of heavy caliber anti-corrosive steel tube and manufacture craft |
| CN110405419A (en) * | 2019-07-29 | 2019-11-05 | 中国石油集团渤海石油装备制造有限公司 | A kind of preparation method of short ruler anti-corrosive steel tube |
| CN113848170A (en) * | 2020-06-28 | 2021-12-28 | 中国石油天然气股份有限公司 | Method for detecting performance of pipeline anticorrosive coating |
-
2008
- 2008-10-08 CN CNU2008201228532U patent/CN201273399Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929155A (en) * | 2010-08-30 | 2010-12-29 | 浙江中隧桥波形钢腹板有限公司 | Heavy-duty anticorrosion protection process of hollow steel pipe pile |
| CN104653947A (en) * | 2014-04-29 | 2015-05-27 | 郝连国 | Preparation method for steel pipe fitting with anticorrosive layer |
| CN109210282A (en) * | 2018-10-23 | 2019-01-15 | 山东禹王管业有限公司 | A kind of heavy caliber anti-corrosive steel tube and manufacture craft |
| CN110405419A (en) * | 2019-07-29 | 2019-11-05 | 中国石油集团渤海石油装备制造有限公司 | A kind of preparation method of short ruler anti-corrosive steel tube |
| CN110405419B (en) * | 2019-07-29 | 2020-06-19 | 中国石油集团渤海石油装备制造有限公司 | Preparation method of short anticorrosive steel pipe |
| CN113848170A (en) * | 2020-06-28 | 2021-12-28 | 中国石油天然气股份有限公司 | Method for detecting performance of pipeline anticorrosive coating |
| CN113848170B (en) * | 2020-06-28 | 2024-01-30 | 中国石油天然气股份有限公司 | Method for detecting performance of pipeline anti-corrosion layer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090715 |
|
| CX01 | Expiry of patent term |