CN109263153A - A kind of the pipeline corrosion protection structure and method of wet environment - Google Patents

A kind of the pipeline corrosion protection structure and method of wet environment Download PDF

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Publication number
CN109263153A
CN109263153A CN201811122248.XA CN201811122248A CN109263153A CN 109263153 A CN109263153 A CN 109263153A CN 201811122248 A CN201811122248 A CN 201811122248A CN 109263153 A CN109263153 A CN 109263153A
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CN
China
Prior art keywords
pipeline
metal mesh
insulating
corrosion
layer
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.)
Withdrawn
Application number
CN201811122248.XA
Other languages
Chinese (zh)
Inventor
赵海阳
刘建
席志强
邵浩冉
王现伟
孟凯
董晴
王超
万如刚
夏波
吕继文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Qingyuan Pipeline Technology Co Ltd
Original Assignee
Jiangsu Qingyuan Pipeline Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Qingyuan Pipeline Technology Co Ltd filed Critical Jiangsu Qingyuan Pipeline Technology Co Ltd
Priority to CN201811122248.XA priority Critical patent/CN109263153A/en
Publication of CN109263153A publication Critical patent/CN109263153A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00Layered products having a non-planar shape
    • B32B1/08Tubular products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/02Layer formed of wires, e.g. mesh
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/06Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/14Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00Layered products comprising a layer of natural or synthetic rubber
    • B32B25/12Layered products comprising a layer of natural or synthetic rubber comprising natural rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/06Accessories therefor, e.g. anchors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/02Coating on the layer surface on fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/06Coating on the layer surface on metal layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/20Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/20Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21Anti-static
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/714Inert, i.e. inert to chemical degradation, corrosion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/726Permeability to liquids, absorption
    • B32B2307/7265Non-permeable

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The invention patent discloses the pipeline corrosion protection structure and method of a kind of wet environment, anticorrosion structure, it include: pipeline, pedestal, insulating corrosion layer, metal mesh, waterproof insulating layer, anti-corrosion method, comprising: pour pedestal, line treatment, setting insulating corrosion layer, winding metal mesh, setting waterproof insulating layer.The present invention is isolated wet environment below pipeline by pedestal and avoids pipe sedimentation, double hyer insulation avoids stray electrical current from flowing directly into pipeline, metal mesh forms electrostatic screen to reduce the influence of electric field that electric current flowing in soil is formed to pipeline, provide it is a kind of it is with strong points, Corrosion Protection is good, high reliablity, construction technology are easy, the pipeline corrosion protection structure of wet environment at low cost.

Description

A kind of the pipeline corrosion protection structure and method of wet environment
Technical field
The present invention relates to pipeline corrosion protection field more particularly to the pipeline corrosion protection fields of wet environment.
Background technique
When carrying out remote liquid or gas transport, pipeline transportation is often used, and during transportation, pipeline buries more It in underground, and needs across different zones, the roughing-in in different underground environments, this is no small challenge to pipeline.Cause For, there are the source of corrosion that a variety of pairs of pipelines have corrosiveness, stray electrical current, microorganism, acid, alkali, salt etc. all can be rotten in underground environment Pipeline is lost, so that the electrochemical corrosion of oxygen uptake burn into, hydrogen sulfide corrosion, bacterial corrosion etc. occur for pipeline.
Moist underground environment is especially obvious to the corrosion of pipeline, there is a large amount of moisture in wet condition, these water Divide so that acid, alkali, salt can form solution, mobility is stronger, and also more closely, chemical property is being dissolved in water to the contact with pipeline What is also showed afterwards is more abundant, and corrosivity is stronger.For wet environment more favorably with the growth of microorganism, microbial activity is stronger, rotten Corrosion is also with increase.Damp soil resistance is smaller, and propagation resistance is just smaller in the soil for stray electrical current, and current strength is more Greatly, it is easier to enter pipeline, when flowing through pipeline caused by corrosion failure it is also even more serious.Wetland is more slack and undisciplined, by External force easily deforms, is recessed, can be gradually recessed under the long term of pipeline gravity, so that pipeline settles, increases The shear stress of pipeline, or even damage pipeline.
Various corrosion can be all enhanced in wet condition, so that pipeline receives more serious damage, but stray electrical current exists Corrosiveness enhancing under wet environment is the most obvious, and not only current strength is influenced to significantly increase by slowly drained soil, Er Qie electricity Stream itself is propagated rapidly, and electrochemical corrosion itself is also more rapider and stronger to the corrosivity of pipeline than other corrosion, therefore When pipeline is by moist underground environment, need that corresponding measure is taken to reduce electrochemical corrosion.
Existing corrosion-proof technology for pipeline application is wide, but does not have specific aim, and anti-corrosion effect is less desirable, especially It is for electrochemical corrosion caused by stray electrical current in wet environment, without corresponding specific aim measure.
Summary of the invention
The problem of corroding present invention aim to address pipeline in wet environment, especially stray electrical current causes electrification The problem of learning corrosion, provide it is a kind of it is with strong points, Corrosion Protection is good, high reliablity, construction technology are easy, humidity at low cost The pipeline corrosion protection structure and anti-corrosion method of environment.
A kind of the technical solution adopted in the present invention: pipeline corrosion protection structure of wet environment, comprising: pipeline, pedestal, insulation Erosion resistant coating, metal mesh, waterproof insulating layer;
Pedestal described further is formed by concreting, is located at below pipeline, is primarily served supporting pipeline, separate pipeline With lower section wet environment, while increasing forced area, avoids effect of the pipeline by gravitational settling;
Further, the insulating corrosion layer is made of natural rubber by chemical industry vulcanizing treatment, is located at pipeline periphery, is close to Pipeline wall surface, does not interspace, and not only has good insulating properties, but also corrosion-resistant, has both anti-corrosion and insulation function;
Further, the metal mesh is wrapped on insulating corrosion layer, is close to insulating corrosion layer, metal mesh is by anti-corrosion Reason, surface is coated with anticorrosive paint;
Further, by non-conductive fibre product as ground, leaching is made the waterproof insulating layer with insulated paint, is located at metal mesh Outside, metal mesh is closely clipped in the middle together with insulating corrosion layer, the waterproof insulating layer has certain mechanical strength, and insulate Property is good, while moisture-resistance is strong, has both insulation and water-proof function.
A kind of pipeline corrosion protection method of wet environment of the present invention is as follows:
(1) it pours pedestal: in the pipeline groove excavated, along channel bottom, going out to place pipeline institute with concreting The pedestal needed;
(2) line treatment: integrally carrying out cleaning treatment to pipeline, by the rusty stain, greasy dirt, dust of pipeline surfaces externally and internally, this The substance unfavorable to pipeline is removed a bit;
(3) insulating corrosion layer is set: insulating corrosion layer being close to pipeline setting, it is made not have gap between pipeline;
(4) it winds metal mesh: preservative treatment being carried out to metal mesh, metal mesh is dipped in anticorrosive paint, keeps metal mesh each Anticorrosive paint is sufficiently smeared on a surface, does not stay dead angle, and then metal mesh is tightly wound around on insulating corrosion layer;
(5) waterproof insulating layer is set: waterproof insulating layer being arranged in outside metal mesh, it is made tightly to wrap metal mesh, it will Metal mesh is clamped between waterproof insulating layer and insulating corrosion layer.
Beneficial effects of the present invention: (1) concreting at pedestal pipeline and lower section wet environment are separated, reduce Influence of the wet environment to corrosive pipeline, while increasing forced area, avoid pipeline by gravitational settling;(2) natural rubber chemical industry The insulating corrosion layer formed after processing had not only had good insulating properties, but also corrosion-resistant, the electrification that can prevent stray electrical current from being formed Corrosion is learned, and is avoided that other kinds of corrosion;(3) waterproof insulating layer except insulation in addition to can also humidity, reduce wet environment Influence to corrosion;(4) double hyer insulation makes stray electrical current be difficult to flow directly into pipeline, and the presence of metal mesh be capable of forming it is quiet Electrical shielding reduces influence of the electric field of electric current flowing formation in soil to pipeline whereby.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
In figure: 1-pipeline, 2-pedestals, 3-insulating corrosion layers, 4-metal meshes, 5-waterproof insulating layers.
Specific embodiment:
The present invention is described in detail with specific example with reference to the accompanying drawing.
As shown, the inventive system comprises: pipeline (1), insulating corrosion layer (3), metal mesh (4), is prevented pedestal (2) Water insulating layer (5), the pedestal (2) are formed by concreting, are located at below pipeline (1), and supporting pipeline (1) separates pipeline (1) with lower section wet environment, while increasing forced area, avoid pipeline (1) by gravitational settling;The insulating corrosion layer (3) by Natural rubber is made by chemical industry vulcanizing treatment, is located at pipeline (1) periphery, is close to pipeline (1) wall surface, does not interspace, both had Good insulating properties, but it is corrosion-resistant, have both anti-corrosion and insulation function;The metal mesh (4) is wrapped on insulating corrosion layer (3), It is close to insulating corrosion layer (3), the metal mesh (4) passes through preservative treatment, and surface is coated with anticorrosive paint;The waterproof insulating layer (5) by non-conductive fibre product as ground, leaching is made with insulated paint, is located at metal mesh (4) outside, together with insulating corrosion layer (3) Metal mesh (4) is closely clipped in the middle, the waterproof insulating layer (5) has certain mechanical strength, and good insulating, while moisture resistance Wet performance is strong, has both insulation and water-proof function.
A kind of pipeline corrosion protection method of wet environment of the present invention is as follows:
(1) pedestal (2) are poured: in pipeline (1) groove excavated, along channel bottom, going out to place with concreting Pedestal (2) needed for pipeline (1);
(2) pipeline (1) is handled: cleaning treatment is integrally carried out to pipeline (1), by rusty stain, the oil of pipeline (1) surfaces externally and internally Dirty, dust, these substances unfavorable to pipeline (1) are removed;
(3) insulating corrosion layer (3) are set: insulating corrosion layer (3) being close to pipeline (1) setting, make insulating corrosion layer (3) There is no gap between pipeline (1);
(4) metal mesh (4) are wound: preservative treatment are carried out to metal mesh (4), metal mesh (4) is dipped in anticorrosive paint, So that metal mesh (4) each surface is sufficiently smeared anticorrosive paint, do not stay dead angle, it is anti-that metal mesh (4) is then tightly wound around insulation On rotten layer (3);
(5) waterproof insulating layer (5) are set: waterproof insulating layer (5) being arranged in metal mesh (4) outside, wraps it tightly Metal mesh (4) is clamped between waterproof insulating layer (5) and insulating corrosion layer (3) by metal mesh (4).

Claims (4)

1. a kind of pipeline corrosion protection structure of wet environment, comprising: pipeline (1), pedestal (2), insulating corrosion layer (3), metal mesh (4), waterproof insulating layer (5), it is characterised in that: the pedestal (2) is formed by concreting, is located at below pipeline (1);It is described Insulating corrosion layer (3) is made of natural rubber by chemical industry vulcanizing treatment, is located at pipeline (1) periphery, is close to pipeline (1) wall surface, It does not interspace;The metal mesh (4) is wrapped on insulating corrosion layer (3);The waterproof insulating layer (5) is located at metal mesh (4) outside, Metal mesh (4) is closely clipped in the middle together with insulating corrosion layer (3).
2. a kind of pipeline corrosion protection structure of wet environment according to claim 1, it is characterised in that: the metal mesh (4) It is wrapped on insulating corrosion layer (3), is close to insulating corrosion layer (3), the metal mesh (4) passes through preservative treatment, and surface is coated with Anticorrosive paint.
3. a kind of pipeline corrosion protection structure of wet environment according to claim 1, it is characterised in that: the waterproof insulating layer (5) by non-conductive fibre product as ground, leaching is made with insulated paint, is located at metal mesh (4) outside, together with insulating corrosion layer (3) Metal mesh (4) is closely clipped in the middle.
4. a kind of pipeline corrosion protection method of wet environment, it is characterised in that: specific anti-corrosion method is as follows:
(1) pedestal (2) are poured: in pipeline (1) groove excavated, along channel bottom, going out to place pipeline with concreting (1) pedestal (2) needed for;
(2) pipeline (1) is handled: cleaning treatment is integrally carried out to pipeline (1), by rusty stain, greasy dirt, the ash of pipeline (1) surfaces externally and internally Dirt, these substances unfavorable to pipeline (1) are removed;
(3) insulating corrosion layer (3) are set: insulating corrosion layer (3) being close to pipeline (1) setting, make insulating corrosion layer (3) and pipe Road does not have gap between (1);
(4) metal mesh (4) are wound: preservative treatment is carried out to metal mesh (4), metal mesh (4) is dipped in anticorrosive paint, gold is made Belong to net (4) each surface and sufficiently smear anticorrosive paint, does not stay dead angle, metal mesh (4) is then tightly wound around insulating corrosion layer (3) on;
(5) waterproof insulating layer (5) are set: waterproof insulating layer (5) being arranged in metal mesh (4) outside, it is made tightly to wrap metal Metal mesh (4) is clamped between waterproof insulating layer (5) and insulating corrosion layer (3) by net (4).
CN201811122248.XA 2018-09-26 2018-09-26 A kind of the pipeline corrosion protection structure and method of wet environment Withdrawn CN109263153A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236908A (en) * 2021-06-17 2021-08-10 东方工建集团有限公司 Anticorrosion construction method for natural gas transmission pipeline

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205534834U (en) * 2016-03-29 2016-08-31 辽河石油勘探局 Oil gas pipeline anticorrosive protection device
CN106195463A (en) * 2016-07-18 2016-12-07 河南省水利第二工程局 A kind of pressure pipeline of water-tight corrosion-proof
CN206072565U (en) * 2016-09-19 2017-04-05 楚雄润丰塑业有限公司 Wire reinforced plastic cement pipe with isolating and protecting layer
CN206268618U (en) * 2016-12-19 2017-06-20 中冶京诚工程技术有限公司 Pipeline support frame used in comprehensive pipe gallery and external member thereof
CN206754617U (en) * 2017-05-26 2017-12-15 江苏环宇建设工程有限公司 The prefabricated natural gas line of concrete outer cladding
CN108036121A (en) * 2017-12-18 2018-05-15 中裕软管科技股份有限公司 A kind of corrosion resistance graphene petroleum pipeline and preparation method thereof
CN209365500U (en) * 2018-09-26 2019-09-10 江苏清源管道技术有限公司 A kind of pipeline corrosion protection structure of wet environment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205534834U (en) * 2016-03-29 2016-08-31 辽河石油勘探局 Oil gas pipeline anticorrosive protection device
CN106195463A (en) * 2016-07-18 2016-12-07 河南省水利第二工程局 A kind of pressure pipeline of water-tight corrosion-proof
CN206072565U (en) * 2016-09-19 2017-04-05 楚雄润丰塑业有限公司 Wire reinforced plastic cement pipe with isolating and protecting layer
CN206268618U (en) * 2016-12-19 2017-06-20 中冶京诚工程技术有限公司 Pipeline support frame used in comprehensive pipe gallery and external member thereof
CN206754617U (en) * 2017-05-26 2017-12-15 江苏环宇建设工程有限公司 The prefabricated natural gas line of concrete outer cladding
CN108036121A (en) * 2017-12-18 2018-05-15 中裕软管科技股份有限公司 A kind of corrosion resistance graphene petroleum pipeline and preparation method thereof
CN209365500U (en) * 2018-09-26 2019-09-10 江苏清源管道技术有限公司 A kind of pipeline corrosion protection structure of wet environment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236908A (en) * 2021-06-17 2021-08-10 东方工建集团有限公司 Anticorrosion construction method for natural gas transmission pipeline

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Application publication date: 20190125