CN204201307U - The high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion - Google Patents
The high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion Download PDFInfo
- Publication number
- CN204201307U CN204201307U CN201420492088.9U CN201420492088U CN204201307U CN 204201307 U CN204201307 U CN 204201307U CN 201420492088 U CN201420492088 U CN 201420492088U CN 204201307 U CN204201307 U CN 204201307U
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- Prior art keywords
- pipe
- corrosion
- polyolefin
- composite pipe
- base tube
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- Expired - Lifetime
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- 230000007797 corrosion Effects 0.000 title claims abstract description 46
- 238000005260 corrosion Methods 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 38
- 229920000098 polyolefin Polymers 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 18
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 229910052755 nonmetal Inorganic materials 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 241000272165 Charadriidae Species 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model discloses the high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion, it polyolefin pipe comprising metal base tube and be arranged in metal base tube.Polyolefin pipe outer wall is close to the inwall of metal base tube.The end of composite pipe is also connected with steel flanges and polyolefin flange, the joint length demand fixed-length of composite pipe.The utility model can effectively reduce oil-gas pipeline uniform corrosion rate and pitting corrosion speed, ensure that pipeline reaches projected life after coming into operation, reach and improve running efficiency of system and reduce operating cost, solve oil-gas gathering and transportation treatment process pipeline internal corrosion problem.
Description
Technical field
The utility model relates to a kind of anticorrosive composite pipe, particularly relates to a kind of high temperature resistant integral embedded type composite pipe of anti-spot corrosion being applied to oil-gas gathering and transportation processing system.
Background technique
In oil and gas exploitation industry, corrosion is present in each production link of the defeated processing system of oil gas field collection, and corrosive environment is different, and corrosion characteristics is different, and main manifestations is homogeneous corrosion (general corrosion) and local etching (pitting corrosion).From technological layer, homogeneous corrosion represents the maximal destruction of corrosion to metal, but to endanger in production of hydrocarbons be not very large, because it occurs in whole surfaces, is easy to find and control, usually just can controls when engineering design.And spot corrosion is a kind of typical local etching form, there is larger disguise and destructiveness, in production of hydrocarbons, the distribution of spot corrosion has randomness, in oil-gas gathering and transportation treatment process pipe-line system, particularly judge the pipeline remaining life that spot corrosion occurs, carry out pitting corrosion protection Design still very large difficulty, current domestic and international common way is the new resistance to some corrosion material of development, seek to prevent spot corrosion by way of.
At CO
2-H
2s-H
2o-Cl
--O
2under harsh corrosive environment system, metallic conduit based on pitting corrosion, homogeneous corrosion is time, pitting corrosion speed is almost 100 times of uniform corrosion rate, corrosion failure problem governs the Efficient Development of oil gas field frequently, not only cause the significantly rising of annual all kinds of economic loss, too increase the risk hidden danger that oil gas field safety and environmental protection is produced simultaneously.Existing oil-gas gathering and transportation treatment process pipe-line system adopts three kinds of aseptic technics usually: one is adopt to increase corrosion allowance, selects thick-walled metal tubing, and two is adopt metal tube undercoating and corrosion inhibitor protection, three to be adopt corrosion resistant metal material.
Research shows: adopt and increase corrosion allowance thick-walled metal tubing, can only solve homogeneous corrosion problem, but fundamentally can not solve the problem rate of current process pipelines height pitting corrosion, cannot meet tubing effective service life; Adopt metal tube undercoating and corrosion inhibitor protection due to process pipelines meet and discuss, elbow, two logical, threeway and expansion bends tie point many, jointing undercoating repaired mouth is weak spot, corrosion inhibitor protection then affects by factors such as pipeline internal flow composition, flow velocity and tube wall states, cannot reach desirable protection effect; Adopt corrosion resistant metal material because of expensive, less economical and application is restricted.
The advantage such as nonmetallic pipe has corrosion-resistant, inner wall smooth, medium transport resistance is little, thermal conductivity is low, thermal loss is little and technical economic benefit is good, has been widely used in the oil-gas gathering and transportation processing pipeline of the buried-pipe laying of domestic and international oil gas field at present.For built on stilts oil vapor treatment process pipelines, nonmetallic pipe is applied as raising mechanical strength, need increase a lot of supporting frame during installation, and simultaneously by the change of fed sheet of a media pressure, temperature and military service circumstance of temperature difference, UV sunlight damage influence, its working life reduces.Particularly there will be deformation expanding with heat and contract with cold in running, there is serious potential safety hazard.Built on stilts oil vapor treatment process metal pipeline arranges multiple expansion bends, object is Controlling Technology pipeline deformation hidden danger, describe from the side and directly take nonmetallic pipe to make somebody a mere figurehead the infeasibility of laying at piping lane, in addition GB, rower all in clear stipulaties oil vapor treatment station pipeline should not take non-metal pipe, also further illustrate the restriction that nonmetallic pipe is applied at process pipeline.
Therefore, need to carry out corresponding tubing Prevention of Corrosion for the corrosive environment that oil gas field is concrete, start with from material protection, select the anticorrosive pipeline of oil-gas gathering and transportation treatment process of a kind of technical feasibility, economical rationality.
Model utility content
For solving the etching problem of above-mentioned oil vapor treatment process pipelines, the utility model discloses a kind of high temperature resistant integral embedded type composite pipe of anti-spot corrosion of wide adaptability, the polyolefin pipe that this composite pipe comprises metal base tube and is embedded in metal base tube, described polyolefin pipe external diameter is greater than metal base tube 1%, take radial homogeneous compaction pattern (interting in isometrical compression), reach mating of interior pipe and base tube, the outer wall realizing polyolefin pipe is close to the inwall of metal base tube.
Wherein, the end of described metal base tube is also connected with metal flange; The end of described polyolefin pipe is formed with polyolefin flange; The end face of described polyolefin flange is close to the end face of metal flange.
Wherein, the nominal diameter of described polyolefin pipe is 100mm ~ 700mm, nominal wall thickness 4mm ~ 16mm.
Accompanying drawing explanation
Fig. 1 is the part sectioned view of the high temperature resistant integral embedded type composite pipe of the anti-spot corrosion of the utility model.
[primary clustering symbol description]
1 metal base tube
2 polyolefin pipes
3 metal flanges
4 polyolefin flanges
Embodiment
For fully understanding the purpose of this utility model, feature and effect, existing by following specific embodiment, and coordinate accompanying drawing, the utility model is described in detail as follows:
As is illustrated in the left side of fig. 1, composite pipe described in the utility model comprises metal base tube 1 and polyolefin pipe 2, described polyolefin pipe 2 external diameter is greater than metal base tube 1%, to be embedded in metal base tube 1 and outer wall is close to the inwall of metal base tube 1 by interting in radial homogeneous compaction pattern.In order to dock the leakage problems of joint between composite pipe described in the utility model and solution composite pipe better, also can at composite pipe two end part weld metal flange 3, preferably steel face-flange.The end of polyolefin pipe 2 forms polyolefin flange 4 by fixed length high temperature flange and end face is close to the end face of metal flange 3.
Wherein, described polyolefin pipe 2 selects the high-temperature-resistance polyolefin material of Korea S LG high resistance S, anti-Cl-, as the major ingredient producing tubing, compared with traditional high-density polyethylene material, difference is mainly that this material imports octene co-monomer in the course of the polymerization process, form side chain at vinyl side chain, how flexible octenyl side chain mutually tangles and forms sheet crystalline structure.The molecule side chain distributed architecture of this uniqueness make it possess remarkable anticorrosive, high temperature resistant, resistance to draw dial, vacuum-resistant, stress crack resistant, anti-hydrostatic strength.Inheriting in the creep-resistant property of high density polyethylene (HDPE) family excellence, anti-permeability performance and low temperature resistant embrittlement performance basis, abandoning common high density polyethylene (HDPE) can not bear more than 60 DEG C serviceability temperature restriction at oil gas field crude oil pipeline liner simultaneously.And remain the outstanding sweat soldering performance of plastic materials, be the high resistance to corrosion resistant to elevated temperatures liner polyolefin pipe product being exclusively used in petroleum and petrochemical industry.
The single cut lengths of described polyolefin pipe 2 is 6m ~ 11m, and nominal diameter is 100mm ~ 700mm, nominal wall thickness 4mm ~ 16mm, and above-mentioned nominal wall thickness can effectively reach etch-proof effect.In addition, polyolefin pipe 2 pipe external diameter is also greater than metal base tube 1 internal diameter 1%.The vicat softening temperature of polyolefin pipe 2 is 124.5 DEG C, and design temperature is 90 DEG C, and operating temperature is 75 DEG C, design pressure 2.5MPa, working pressure 1.6MPa.
Be below high resistance to corrosion high-temperature-resistance polyolefin pipe physicochemical property parameter:
Composite pipe of the present utility model is when docking use, define integrity flange that is nonmetal and nonmetal, secondary seal between metal and metal, while anti-spot corrosion, high temperature resistant, impermeabilisation, also achieve the tight seal of jointing between composite pipe, reach zero leakage.
It should be noted that, the selection of nonmetallic pipe material of the present utility model, the design of wall thickness, the calculating of elongation and interface connect sealing means etc., all need to be optimized according to different operating modes such as conveying oil and gas and water medium, production pressure and temperatures to determine, and be not limited to the data of above-described embodiment.Such as, the rock gas content H2S content 350mg/m of certain oil-gas gathering and transportation treatment process pipeline
3, CO
2content 1.5%; Crude oil water content 75%; Its place formation water salinity 23 × 10
4mg/L, Cl
-content 13 × 10
4mg/L, pH value 5.5, corrosive medium is strong, and pitting corrosion speed is high.For this situation, can select the high-temperature-resistance polyolefin material of high resistance S, anti-Cl-, the non-metallic inner liner pipe embedding nominal diameter making 9-11mm thickness is the process pipelines of 300-400mm, thus solves etching problem targetedly.
Anti-spot corrosion of the present utility model is high temperature resistant integral embedded type composite pipe, compared with traditional metallic conduit, has the following advantages:
1, by polyolefin pipe is embedded metal base tube, uniting two into one of the nonmetal antiseptic property of internal lining pipe and metal tube mechanical property is achieved.Polyolefin pipe lining structure, can stop Korrosionsmedium in fed sheet of a media to the erosion of metallic steel tube material, has again the strength characteristics of metallic conduit simultaneously, can to meet under operating conditions condition design service life 20 years.
2, pipe lining polyolefin pipe material smooth surface is smooth, absolute roughness K=0.01mm, 1/10 of new metallic steel tube wall 0.06 ~ 0.1mm, 1/100 of seriously corroded steel pipe tube wall 1 ~ 3mm, the reduction greatly of inner tube wall surface roughness, makes the hydraulics of conveying obtain obvious improvement.
3, pipe lining polyolefin pipe thermal conductivity 0.4W/m.k, 1/200 of metal steel pipe 80W/m.k, effectively reduce heat loss, certain thickness polyolefin pipe pipe embeding layer has certain heat-blocking action simultaneously, compensate for heat loss amount after the breakage of pipeline external thermal insulation, improve pipeline heating power transportation performance.
4, embedded polyolefin pipe material is turned up and is formed nonmetal flange, instead of metal flange pad during virgin metal Flange joint, ensure that between pipeline section and pipeline section, the sealing of the interface of pipeline section and pipe fitting, effectively prevent the seepage occurred in pipeline performance process.
5, composite pipe of the present utility model effectively inhibits the generation of oil-gas gathering and transportation treatment process point pipeline corrosion failure problem.Its cost of production is low, control corrosion rate from source, is conducive to the safety in production of oil gas field, ensures that oil field realizes Efficient Development.
In addition, composite pipe of the present utility model, can move towards on the basis that formalized at existing process pipelines, do not change the treatment media flow direction, process pipeline trend and line construction, and designed and produced by the former process pipelines scene of precision measuremnt and accurate Calculation, adopt the method embedding the fabrication and installation of polyolefin pipe original position, realize process pipeline and embed the installation of polyolefin pipe original position.
Can be understood as, the utility model is described by some embodiments, and those skilled in the art, when not departing from spirit and scope of the present utility model, can carry out various change or equivalence replacement to these characteristic sum embodiment.In addition, under instruction of the present utility model, can modify to adapt to concrete situation and material to these characteristic sum embodiment and spirit and scope of the present utility model can not be departed from.Therefore, the utility model is not by the restriction of specific embodiment disclosed herein, and the embodiment in the right of all the application of falling into belongs to protection domain of the present utility model.
Claims (3)
1. the high temperature resistant integral embedded type composite pipe of anti-spot corrosion, it is characterized in that, comprise: metal base tube (1) and the polyolefin pipe (2) be embedded in metal base tube (1), the outer wall of described polyolefin pipe (2) is close to the inwall of described metal base tube (1).
2. composite pipe as claimed in claim 1, it is characterized in that, the end of described metal base tube (1) is also connected with metal flange (3); The end of described polyolefin pipe (2) is formed with polyolefin flange (4); The end face of described polyolefin flange (4) is close to the end face of metal flange (3).
3. composite pipe as claimed in claim 1, it is characterized in that, the nominal diameter of described polyolefin pipe (2) is 100mm ~ 700mm, nominal wall thickness 4mm ~ 16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492088.9U CN204201307U (en) | 2014-08-28 | 2014-08-28 | The high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492088.9U CN204201307U (en) | 2014-08-28 | 2014-08-28 | The high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion |
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| Publication Number | Publication Date |
|---|---|
| CN204201307U true CN204201307U (en) | 2015-03-11 |
Family
ID=52659269
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420492088.9U Expired - Lifetime CN204201307U (en) | 2014-08-28 | 2014-08-28 | The high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204201307U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591679A (en) * | 2018-07-04 | 2018-09-28 | 杭州莘源科技有限公司 | A kind of nonmetal pipeline end-fitting |
| JP2019084819A (en) * | 2017-11-09 | 2019-06-06 | 株式会社デンソー | Joint structure and heat exchanger |
| CN114857373A (en) * | 2022-04-28 | 2022-08-05 | 重庆鼎久管道有限公司 | Bimetal welding plastic-coated composite steel pipe |
-
2014
- 2014-08-28 CN CN201420492088.9U patent/CN204201307U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019084819A (en) * | 2017-11-09 | 2019-06-06 | 株式会社デンソー | Joint structure and heat exchanger |
| CN108591679A (en) * | 2018-07-04 | 2018-09-28 | 杭州莘源科技有限公司 | A kind of nonmetal pipeline end-fitting |
| CN114857373A (en) * | 2022-04-28 | 2022-08-05 | 重庆鼎久管道有限公司 | Bimetal welding plastic-coated composite steel pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150311 |
|
| CX01 | Expiry of patent term |