CN202546107U - Hot-bending bend for phi1420 large-diameter gas pipeline - Google Patents
Hot-bending bend for phi1420 large-diameter gas pipeline Download PDFInfo
- Publication number
- CN202546107U CN202546107U CN2012201689573U CN201220168957U CN202546107U CN 202546107 U CN202546107 U CN 202546107U CN 2012201689573 U CN2012201689573 U CN 2012201689573U CN 201220168957 U CN201220168957 U CN 201220168957U CN 202546107 U CN202546107 U CN 202546107U
- Authority
- CN
- China
- Prior art keywords
- hot
- solvent
- bend
- coating
- phi1420
- 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.)
- Expired - Lifetime
Links
- 238000013003 hot bending Methods 0.000 title claims abstract description 23
- -1 polypropylene Polymers 0.000 claims abstract description 12
- 239000004593 Epoxy Substances 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 10
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 7
- 229920006334 epoxy coating Polymers 0.000 abstract description 6
- 239000002390 adhesive tape Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000002421 anti-septic effect Effects 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The utility model discloses a hot-bending bend for a phi1420 large-diameter gas pipeline, comprising a bend body, wherein an anticorrosive coating is coated on the outer surface of the bend body, and an outer protective layer is wound on the outer surface of the anticorrosive coating. The hot-bending bend has the advantages that the integrity of the anticorrosive coating of the hot-bending bend for the phi1420 large-diameter gas pipeline can be protected, and the safety and the reliability of pipeline operation are improved; solvent-free liquid epoxy has the advantages of good bonding performance of epoxy coating and the surface of a steel pipe, chemical medium erosion resistance, good anticorrosive performance, small cathodic disbanding radius and wide using temperature range; a polypropylene adhesive tape is additionally arranged outside the solvent-free epoxy coating for mechanical protection; and the solvent-free epoxy coating with the polypropylene adhesive tape not only can be prefabricated in factories, but also can be manufactured in construction sites, the construction flexibility is high and the construction difficulty is low.
Description
Technical field
The utility model relates to a kind of natural gas pipeline, especially relates to a kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends.
Background technique
The hot-bending bends of oil and gas pipeline engineering is owing to the irreqularity of its profile, and its anticorrosive coat is a difficult problem always, and Ф 1420 heavy caliber air transmission pipeline hot-bending bends; Because caliber is big, bend pipe is long, and weight is big; Its anticorrosive coat not only will be considered antiseptic property, also will consider crashworthiness.
The anticorrosion main employing radiant crosslinked polyethylene heat-contraction sleeve of the hot-bending bends of present domestic petroleum natural gas pipeline projects, clinkery epoxy powder coating, cold-tape hot-winding multi-layer structure polyethylene anticorrosive coating etc.But for Ф 1420 heavy caliber air transmission pipeline hot-bending bends, more than various anticorrosive coats all have certain deficiency.Because Ф 1420 heavy caliber air transmission pipeline hot-bending bends calibers are big, when carrying out the construction of radiant crosslinked polyethylene heat-contraction sleeve, be easy to cause and shrink uneven scene, influence anticorrosive quality; For the clinkery epoxy powder coating, because its shock resistance is not ideal, when long-distance transport, be easy to damage, because the weight of Ф 1420 heavy caliber air transmission pipeline hot-bending bends is huge, cause the probability of damage to heighten.For cold-tape hot-winding multi-layer structure polyethylene anticorrosive coating, because it need carry out the domestic production line that also is not directed against Ф 1420 heavy caliber air transmission pipeline hot-bending bends at present on special production line.
The model utility content
The utility model has overcome shortcoming of the prior art; A kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends are provided, have adopted two-layer safeguard structure, so long service life; Not cracky, and exploitativeness, operability, Security, Economy are greatly improved.
The technological scheme of the utility model is: a kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends, comprise the bend pipe body, and on the outer surface of bend pipe body, apply anticorrosive coat, be wound with external protection at the anticorrosive coat outer surface.
Said anticorrosive coat is solvent-free liquid epoxy anticorrosive coat.
The thickness of said solvent-free liquid epoxy anticorrosive coat is 500 ± 50 μ m.
Said external protection adopts the polypropylene sealing tape to be entwined, and lap width is 50%～55% of a tape width.
The polypropylene sealing tape layer thickness >=2.0mm of said external protection.
Compared with prior art, the utility model has the advantages that: can protect the integrity of Ф 1420 heavy caliber air transmission pipeline hot-bending bends anticorrosive coats, improve pipeline safety in operation, reliability, its advantage is concrete to be found as follows:
1, solvent-free liquid epoxy has the advantage that excellent, the anti-chemical mediator of epoxy coating and steel tube surface cohesiveencess corrodes, antiseptic property is good, the cathodic disbonding radius is little, the serviceability temperature scope is wide.Increase one deck polypropylene sealing tape in non-solvent epoxy coating outside, play the effect of mechanical protection.
2, non-solvent epoxy adds the polypropylene adhesive tape and both can be prefabricated in the factory, and also can make at the construction field (site), and the construction flexibility ratio is high, and difficulty of construction is little.
Description of drawings
The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of the utility model.
Embodiment
A kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends, as shown in Figure 1, comprise bend pipe body 1, anticorrosive coat 2, external protection 3, wherein:
On the outer surface of bend pipe body 1, apply anticorrosive coat 2, be wound with external protection 3 at anticorrosive coat 2 outer surfaces.
Said anticorrosive coat 2 is solvent-free liquid epoxy anticorrosive coat, and solvent-free liquid epoxy coating adopts Airless spraying, and once is sprayed into 500 ± 50 μ m.
Said external protection 3 adopts the polypropylene sealing tape to be entwined, and the lap width of external protection 3 is 50%～55% of a tape width, twines the polypropylene sealing tape layer thickness >=2.0mm that finishes.The effect of external protection 3 is the shock resistances that strengthen hot-bending bends.
Claims (5)
1. Φ 1420 heavy caliber air transmission pipeline hot-bending bends comprise the bend pipe body, it is characterized in that: on the outer surface of bend pipe body, apply anticorrosive coat, be wound with external protection at the anticorrosive coat outer surface.
2. a kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends according to claim 1, it is characterized in that: said anticorrosive coat is solvent-free liquid epoxy anticorrosive coat.
3. a kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends according to claim 2, it is characterized in that: the thickness of said solvent-free liquid epoxy anticorrosive coat is 500 ± 50 μ m.
4. a kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends according to claim 1 is characterized in that: said external protection adopts the polypropylene sealing tape to be entwined, and lap width is 50%～55% of a tape width.
5. a kind of Φ 1420 heavy caliber air transmission pipeline hot-bending bends according to claim 4 is characterized in that: the polypropylene sealing tape layer thickness >=2.0mm of said external protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201689573U CN202546107U (en) | 2012-04-20 | 2012-04-20 | Hot-bending bend for phi1420 large-diameter gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201689573U CN202546107U (en) | 2012-04-20 | 2012-04-20 | Hot-bending bend for phi1420 large-diameter gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202546107U true CN202546107U (en) | 2012-11-21 |
Family
ID=47166745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201689573U Expired - Lifetime CN202546107U (en) | 2012-04-20 | 2012-04-20 | Hot-bending bend for phi1420 large-diameter gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202546107U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112225A (en) * | 2013-02-05 | 2013-05-22 | 华北水利水电学院 | Water turbine movable guide vane nano modified polyurea composite coating material |
| CN103310915A (en) * | 2013-06-28 | 2013-09-18 | 3M中国有限公司 | Method for forming insulating layer on overhead power transmission line |
-
2012
- 2012-04-20 CN CN2012201689573U patent/CN202546107U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112225A (en) * | 2013-02-05 | 2013-05-22 | 华北水利水电学院 | Water turbine movable guide vane nano modified polyurea composite coating material |
| CN103310915A (en) * | 2013-06-28 | 2013-09-18 | 3M中国有限公司 | Method for forming insulating layer on overhead power transmission line |
| CN103310915B (en) * | 2013-06-28 | 2015-10-21 | 3M中国有限公司 | A kind of method forming insulating barrier on overhead transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180117 Address after: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Patentee after: China Petroleum Engineering Construction Co Ltd Address before: 610017 Sichuan province Chengdu Xiaoguan Temple Backstreet No. 25 Patentee before: Engineering Design Co., Ltd., China Petroleum Group |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |
|
| CX01 | Expiry of patent term |