CN105003751A - Inside-epoxy outside-3PE corrosion-preventing pipeline with inner corrosion-preventing layer free of repairing after welding and manufacturing process of inside-epoxy outside-3PE corrosion-preventing pipeline - Google Patents

Inside-epoxy outside-3PE corrosion-preventing pipeline with inner corrosion-preventing layer free of repairing after welding and manufacturing process of inside-epoxy outside-3PE corrosion-preventing pipeline Download PDF

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Publication number
CN105003751A
CN105003751A CN201510425177.0A CN201510425177A CN105003751A CN 105003751 A CN105003751 A CN 105003751A CN 201510425177 A CN201510425177 A CN 201510425177A CN 105003751 A CN105003751 A CN 105003751A
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CN
China
Prior art keywords
pipeline
corrosion
welding
pipe
component
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.)
Pending
Application number
CN201510425177.0A
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Chinese (zh)
Inventor
桑洪涛
赵明印
丛悦增
邓建新
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.)
WEIFANG EAST PIPE INDUSTRY TECHNOLOGY Co Ltd
Original Assignee
WEIFANG EAST PIPE INDUSTRY 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 WEIFANG EAST PIPE INDUSTRY TECHNOLOGY Co Ltd filed Critical WEIFANG EAST PIPE INDUSTRY TECHNOLOGY Co Ltd
Priority to CN201510425177.0A priority Critical patent/CN105003751A/en
Publication of CN105003751A publication Critical patent/CN105003751A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16L13/00Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02Welded joints
    • 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
    • F16L9/00Rigid pipes
    • F16L9/02Rigid pipes of metal

Abstract

The invention relates to an inside-epoxy outside-3PE corrosion-preventing pipeline with an inner corrosion-preventing layer free of repairing after welding and a manufacturing process of the inside-epoxy outside-3PE corrosion-preventing pipeline. A dual-metal structure is firstly compounded in the position, in the end, of the inner wall of a pipeline body, and then corrosion-preventing treatment is carried out. A corrosion-preventing layer, the metal structure and the pipeline wall are closely combined, and the complete and continuous inner corrosion-preventing layer with consistent performance is formed. After welding construction of the inside-epoxy outside-3PE corrosion-preventing pipeline is completed, the inner corrosion-preventing layer cannot be influenced, and inner corrosion-preventing layer repairing operation is not needed.

Description

In after welding, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy and the preparation process thereof of benefit
Technical field
The present invention relates to a kind of anti-corrosion pipeline, be applicable to the outer 3PE anti-corrosion pipeline of interior epoxy, be particularly useful for anticorrosive coat in after welding and be excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, specifically, relate to and a kind ofly weld the outer 3PE anti-corrosion pipeline of interior epoxy and the preparation process thereof that rear interior anticorrosive coat is excused from a college course benefit.
Background technique
Welding connecting mode is adopted for carrying the outer 3PE anti-corrosion pipeline pipeline construction of the interior epoxy of fluid (potable water, industrial water, seawater and all kinds of gas), the heat affected zone that length is about 60 ~ 100mm is there is in pipe end when welding, inner anticorrosioning coating needs to carry out secondary repairing work after welding completes, secondary repairs section coating antiseptic performance cannot reach the equal performance of body, and be only limitted to more than DN800 caliber, because manually cannot secondary repairing work be carried out, there is the problem of heat affected zone without interior anticorrosive coat in middle small pipe-line.Pipeline forms anticorrosion defect in welding heat affected zone, and pipeline easily occurs the accident potential such as corrosion perforation, explosion at this section, and the Corrosion Protection that the outer 3PE anti-corrosion pipeline of interior epoxy is good is subject to 'bottleneck' restrictions.
Summary of the invention
Technical problem to be solved by this invention is for above deficiency, there is provided a kind of and weld the outer 3PE anti-corrosion pipeline of interior epoxy that rear interior anticorrosive coat is excused from a college course benefit, the anti-corrosion pipeline secondary solving more than DN800 caliber in prior art repair after heat affected zone undercoating antiseptic property difference and in small-bore anti-corrosion pipeline heat affected zone without the problem of anticorrosive coat, after adopting anti-corrosion pipeline of the present invention, without the need to carrying out repairing work, anti-corrosion pipeline inwall has continuously complete, the interior anticorrosive coat that performance is consistent, heat affected zone antiseptic property is good, and long service life, at least can reach more than 50 years.
The present invention also provides a kind of and welds the preparation process that rear interior anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, wide adaptability, and no matter pipe diameter size all can realize the continuity of interior anticorrosive coat;
Without the need to carrying out the repairing work of interior anticorrosive coat to heat affected zone after pipeline welding, there is the advantage that technique is simple, easy to operate, low cost, safety coefficient are high;
Adopt preparation process of the present invention, anti-corrosion pipeline pipeline construction efficiency is high and quality good.
For solving the problems of the technologies described above, technological scheme of the present invention is: in after welding, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, comprises pipeline body, it is characterized in that: described pipeline body end is provided with pipe end component.
A kind of optimized project, the inwall that described pipe end component is fitted in pipeline body forms ring-type.
Another kind of optimized project, the outside of described pipe end component exceeds pipeline body end 2 ~ 3mm.
Another optimized project, inside and outside described pipe end component, both sides and joint close welding.
Further optimized project, described pipe end component is strip.
Further optimized project, described pipe end component is stainless steel materials.
The present invention also provides a kind of and welds the preparation process that rear interior anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, it is characterized in that: described preparation process comprises group to installation step.
A kind of optimized project, described group comprises installation step: pipe end Components installation is inner at pipeline body, exceeds pipeline body end face 2 ~ 3mm, and be crimped on pipeline body inwall by pipe end component by expansion frock outside it.
Another kind of optimized project, described preparation process also comprises composite welding step.
Another optimized project, described conjunction welding step comprises: inside and outside pipe end component, both sides and joint carry out closing welding, form the continuous weld be made up of outer side weld, weld joint on inner side and joint weld seam, weld seam extends to pipeline body end face, and pipe end component and pipeline body form firm, complete compound body.
The present invention adopts above technological scheme, compared with prior art, have the following advantages: at pipeline body inner wall of end compound bimetal structure in advance, and then carry out preservative treatment, anticorrosive coat, Structural Hardware, tube wall are combined closely, formed one complete continuously, interior anticorrosive coat that performance is consistent, the outer 3PE anti-corrosion pipeline of interior epoxy is after completing welding procedure, internally can not impact by anticorrosive coat, and not need interior anticorrosive coat repairing work.
The present invention adopts the prefabricated mode combined with welding of bimetal, the annular inflatable frock of the sheet metal of corrosion resistance is crimped on pipe end inside, and outside sheet material, exceed pipe end 2 ~ 3mm, after having welded, define the compound body possessing antiseptic property in pipeline body end, the production technology of existing all kinds of steel-plastic composite pipe can be adapted to.
1, bimetal compound body possesses good welding performance, existing mode is adopted to carry out during pipeline welding construction, anticorrosive coat self-assembling formation integrity, conformity in after welding, avoid carrying out interior anticorrosive coat secondary completely and repair and cannot repair that the integral tube line mass brought declines, lost of life problem, solve complex operation, somewhat expensive, there is the repairing difficult problem of workmen's security risk;
2, interior anticorrosive coat once-through, without the need to repairing, the pattern of the sheet metal welding of the corrosion resistance that end adopts, greatly increases the performance of anti-corrosion pipeline, increases the service life, at least reach more than 50 years.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of pipe end component in the embodiment of the present invention;
Accompanying drawing 2 is preparing processes structural representations of anti-corrosion pipeline in the embodiment of the present invention;
Accompanying drawing 3 is structural representations of anti-corrosion pipeline pipe end in the embodiment of the present invention.
In figure,
1-pipe end component, 2-pipeline body, 3-expansion frock, the outer side weld of 4-, 5-weld joint on inner side, 6-joint weld seam.
Embodiment
Embodiment 1, as shown in Figure 1, Figure 2 and Figure 3, in after welding, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, comprises pipeline body 2, and pipeline body 2 is the outer 3PE anti-corrosive steel tube of interior epoxy, pipeline body 2 end is provided with pipe end component 1, pipe end component 1 is in strip, and pipe end component 1 adopts stainless steel materials, and the inwall that pipe end component 1 is fitted in pipeline body 2 forms ring-type, pipe end component 1 welds with pipeline body 2, and the outside of pipe end component 1 exceeds pipeline body 2 end 2 ~ 3mm.
Pipe end component 1 in the present embodiment also can adopt other sheet metals possessing decay resistance.
Embodiment 2, and in after welding, anticorrosive coat is excused from a college course the preparation process of the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, comprises the following steps:
1) pipeline body is prefabricated.
Adopt the steel pipe of all kinds of molding mode manufacture all to can be used as raw material to use.
2) pipe end element precast.
Possessing the sheet metal of decay resistance, in the present embodiment, adopt stainless steel, being made into bar shaped through shearing.
3) group is to assembling.
Pipe end component 1 is arranged on pipeline body 2 inner, exceeds pipeline body 2 end face 2 ~ 3mm outside it, and by expansion frock 3, pipe end component 1 is crimped on pipeline body 2 inwall.
4) composite welding.
Carry out closing welding along both sides inside and outside pipe end component 1 and joint with electric torch, form the continuous weld be made up of outer side weld 4, weld joint on inner side 5 and joint weld seam 6, weld seam extends to pipeline body 2 end face, and pipe end component 1 and pipeline body 2 form firm, complete compound body.
The above is the citing of best mode for carrying out the invention, and the part wherein do not addressed in detail is the common practise of those of ordinary skill in the art.Protection scope of the present invention is as the criterion with the content of claim, and any equivalent transformation carried out based on technology enlightenment of the present invention, also within protection scope of the present invention.

Claims (10)

1. in after welding, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, comprises pipeline body (2), it is characterized in that: described pipeline body (2) end is provided with pipe end component (1).
2. in after welding as claimed in claim 1, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, it is characterized in that: the inwall that described pipe end component (1) is fitted in pipeline body (2) forms ring-type.
3. in after welding as claimed in claim 1, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, it is characterized in that: the outside of described pipe end component (1) exceeds pipeline body (2) end 2 ~ 3mm.
4. in after welding as claimed in claim 1, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, it is characterized in that: the inside and outside both sides of described pipe end component (1) and joint close welding.
5. in after welding as claimed in claim 1, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, it is characterized in that: described pipe end component (1) is in strip.
6. in after welding as claimed in claim 1, anticorrosive coat is excused from a college course the outer 3PE anti-corrosion pipeline of interior epoxy of benefit, it is characterized in that: described pipe end component (1) is stainless steel materials.
7., as the preparation process of the anti-corrosion pipeline of claim 1-6 as described in one of them, it is characterized in that: described preparation process comprises group to installation step.
8. preparation process as claimed in claim 7, it is characterized in that: described group comprises installation step: pipe end component (1) is arranged on pipeline body (2) inner, exceed pipeline body (2) end face 2 ~ 3mm outside it, and by expansion frock (3), pipe end component (1) is crimped on pipeline body (2) inwall.
9. preparation process as claimed in claim 7, is characterized in that: described preparation process also comprises composite welding step.
10. preparation process as claimed in claim 9, it is characterized in that: described conjunction welding step comprises: carry out closing welding along the inside and outside both sides of pipe end component (1) and joint, form the continuous weld be made up of outer side weld (4), weld joint on inner side (5) and joint weld seam (6), weld seam extends to pipeline body (2) end face, and pipe end component (1) and pipeline body (2) form firm, complete compound body.
CN201510425177.0A 2015-07-20 2015-07-20 Inside-epoxy outside-3PE corrosion-preventing pipeline with inner corrosion-preventing layer free of repairing after welding and manufacturing process of inside-epoxy outside-3PE corrosion-preventing pipeline Pending CN105003751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510425177.0A CN105003751A (en) 2015-07-20 2015-07-20 Inside-epoxy outside-3PE corrosion-preventing pipeline with inner corrosion-preventing layer free of repairing after welding and manufacturing process of inside-epoxy outside-3PE corrosion-preventing pipeline

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510425177.0A CN105003751A (en) 2015-07-20 2015-07-20 Inside-epoxy outside-3PE corrosion-preventing pipeline with inner corrosion-preventing layer free of repairing after welding and manufacturing process of inside-epoxy outside-3PE corrosion-preventing pipeline
PCT/CN2015/085158 WO2017012131A1 (en) 2015-07-20 2015-07-27 Anticorrosive pipeline having inner epoxy and outer 3pe without inner anticorrosive layer repairing after welding and preparation process therefor

Publications (1)

Publication Number Publication Date
CN105003751A true CN105003751A (en) 2015-10-28

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CN (1) CN105003751A (en)
WO (1) WO2017012131A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611833A (en) * 1984-05-24 1986-09-16 Atochem Pipe joints and process for their production
RU2162188C1 (en) * 2000-04-25 2001-01-20 Общество с ограниченной ответственностью Научно-производственное предприятие "Антикормаш" Method of rust protection of welded butt joints of pipelines with internal coating
CN201436131U (en) * 2009-06-22 2010-04-07 宝山钢铁股份有限公司 Inner ring sleeve used for repairing steel coil
CN202017833U (en) * 2011-04-29 2011-10-26 潍坊金通管业有限公司 Bimetal connecting device for plastic-coated steel tube
CN203023743U (en) * 2013-01-30 2013-06-26 赵森龙 Composite pipe with corrosion-resistant alloy joint
CN103612020A (en) * 2013-12-10 2014-03-05 北京隆盛泰科石油管科技有限公司 Method for producing composite pipes by adopting composite steel plates in electric resistance welding and surfacing modes
CN103982748A (en) * 2014-06-10 2014-08-13 武汉中地管通非开挖科技有限公司 Improved repair method for stainless steel lining of pipeline
CN204879085U (en) * 2015-07-20 2015-12-16 潍坊亿斯特管业科技有限公司 Outer 3PE anticorrosion pipeline of interior epoxy of benefit is excused from a college course to anticorrosive coating in welding back

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201196298Y (en) * 2008-05-28 2009-02-18 大庆石油新科庆联防腐有限公司 Round die negative-phase shaping three-layer PE corrosion-proof pipe
CN202561297U (en) * 2012-02-20 2012-11-28 大连合生科技开发有限公司 Pipeline for transporting petroleum and natural gas
CN203131326U (en) * 2013-01-23 2013-08-14 山东华政塑胶科技发展有限公司 3PE anticorrosion steel tube for supplying water

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611833A (en) * 1984-05-24 1986-09-16 Atochem Pipe joints and process for their production
RU2162188C1 (en) * 2000-04-25 2001-01-20 Общество с ограниченной ответственностью Научно-производственное предприятие "Антикормаш" Method of rust protection of welded butt joints of pipelines with internal coating
CN201436131U (en) * 2009-06-22 2010-04-07 宝山钢铁股份有限公司 Inner ring sleeve used for repairing steel coil
CN202017833U (en) * 2011-04-29 2011-10-26 潍坊金通管业有限公司 Bimetal connecting device for plastic-coated steel tube
CN203023743U (en) * 2013-01-30 2013-06-26 赵森龙 Composite pipe with corrosion-resistant alloy joint
CN103612020A (en) * 2013-12-10 2014-03-05 北京隆盛泰科石油管科技有限公司 Method for producing composite pipes by adopting composite steel plates in electric resistance welding and surfacing modes
CN103982748A (en) * 2014-06-10 2014-08-13 武汉中地管通非开挖科技有限公司 Improved repair method for stainless steel lining of pipeline
CN204879085U (en) * 2015-07-20 2015-12-16 潍坊亿斯特管业科技有限公司 Outer 3PE anticorrosion pipeline of interior epoxy of benefit is excused from a college course to anticorrosive coating in welding back

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Application publication date: 20151028

RJ01 Rejection of invention patent application after publication