CN1272564C - Cross linking high density polyethylene pipe and construction process of its alternuting repairing old pipe line - Google Patents

Cross linking high density polyethylene pipe and construction process of its alternuting repairing old pipe line Download PDF

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Publication number
CN1272564C
CN1272564C CN 03126240 CN03126240A CN1272564C CN 1272564 C CN1272564 C CN 1272564C CN 03126240 CN03126240 CN 03126240 CN 03126240 A CN03126240 A CN 03126240A CN 1272564 C CN1272564 C CN 1272564C
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China
Prior art keywords
pipe
crosslinked
pipeline
hdpe
density polyethylene
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Expired - Fee Related
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CN 03126240
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Chinese (zh)
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CN1514157A (en
Inventor
刘素平
张清旭
张金成
王永洪
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HENAN RICH PIPELINE ENGINEERING TECHNOLOGY CO LTD
Rich High Tech Co ltd
Original Assignee
ZHONGYUAN RUICHI WASHING ANTI-CORROSION Co Ltd PUYANG CITY
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Priority to CN 03126240 priority Critical patent/CN1272564C/en
Publication of CN1514157A publication Critical patent/CN1514157A/en
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Publication of CN1272564C publication Critical patent/CN1272564C/en
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Abstract

The present invention relates to crosslinking high-density polyethylene (HDPE) pipes used in a technology of old pipeline interpenetrating repair and a construction technology of old pipeline repair via using the crosslinking HDPE pipes. The present invention has the polyethylene pipe production technology that a polyethylene pipe is formed by preparing and processing component materials of HDPE resin, CPE modified resin, dibutyl ester plasticizers, vulcanizing bisphenol antioxidants, diethyl siloxane crosslinking agents and silanol accelerants. The process of the technology comprises cleaning a pipe using a pipe cleaner, inspecting the inner part of the pipe, molding the crosslinking polyethylene pipe, sweating soldering, deforming and undersizing the pipe at a constant temperature, hauling the pipe into a pipeline to be repaired, welding flanges, recovering deformation and heating, inspecting the quality of the liner tube, jointing ends and completion test. After the crosslinking polymerization of HDPE, an insoluble and infusible thermoset material is formed, of which the strength, the elastic modulus and the performance of chemical solvent resistance, oil resistance, sewage resistance, etc., are notably improved; the heat deformation temperature of the crosslinked polyethylene is raised to 120 DEG C which is 1.5 times of the heat deformation temperature of a common HDPE pipe; the performance of petroleum resistance and chemical medium resistance of the crosslinked polyethylene is better than that of the existing HDPE; the crosslinked polyethylene is applicable to a field of the application of petroleum, oilfield sewage, water injection and chemical medium pipelines.

Description

Crosslinked high density polyethylene pipe
Technical field
The invention belongs to old pipeline non-excavation repairing technique field, relate in particular to a kind of crosslinked high density polyethylene pipe that in interspersed repairing used pipeline technology, uses.
Background technique
In interspersed repairing used pipeline technology, because existing on the market PE pipe can only heatproof 60 ℃ at present, only be suitable for the field such as combustion gas, domestic sewage below 60 ℃, and problems such as hot mastication and oil is molten take place easily for oil pipeline and high temperature pipe, make and intert the repairing used pipeline The Application of Technology and be subjected to very big restriction.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of and manage on the production technology at former HDPE, make the crosslinked polyethylene pipe heatproof bring up to 100 ℃ by adding extraordinary crosslinking agent, can anti-oil and many chemical agents, it can be extended to the crosslinked high density polyethylene pipe in the application of the oil of temperature below 100 ℃, sewage, water filling, chemical pipeline.
The object of the present invention is achieved like this: adopt following each component raw materials by weight portion formulated to form by polyethylene pipe production technology commonly used:
100 parts of HDPE high-density polyethylene resins
CPE modified resin 20-50 part
Dibutyl ester class plasticizing agent 2-10 part
Sulfuration bisphenols antioxidant 0.5-8 part
Di-ethyl siloxane class crosslinking agent 2-20 part
Silanol class promoter 1-10 part
Adopt crosslinked high density polyethylene pipe to intert the construction process of repairing used pipeline to be:
The first step: reconnoitre the job site, pipelines trend is understood piping attachment, determines to have dug operating pit between the construction area pipeline opening flange of burn-oning;
Second step: adopt wiper that old pipeline is carried out pigging, remove dirt, obstacle in the pipeline, guarantee the internal surface requirement of bushing pipe construction;
The 3rd step: with imaging monitoring facilities in the central TV pipeline, pigging quality in the pipeline is checked, judged the technical requirements that whether reaches bushing pipe;
The 4th step: the crosslinked HDPE pipe that adopts constant temperature modification size reducing machine to make carries out constant temperature modification undergauge;
The 5th step: allow crosslinked HDPE pipe behind the undergauge by forming device, with the crosslinked HDPE pipe typing of undergauge;
The 6th goes on foot: the crosslinked HDPE pipe after with tractor undergauge being finalized the design is drawn in the old pipeline to be repaired;
The 7th step: adopt thermofussion welding method welding plastic flange for crosslinked HDPE pipe two ends, carry out end socket and handle;
The 8th step: give that to fill the temperature that contains crosslinking accelerator in the crosslinked HDPE pipe be 90 ℃ thermal medium, heat-insulation pressure keeping makes the crosslinked HDPE pipe of undergauge recover distortion, and carries out cross-linking reaction, and rising simultaneously is affixed in the pipeline of executing lining;
The 9th step: bulge test, check liner mass;
The tenth step: connect head with special bi-directional expansion pipe nipple and handle, recover landforms, the use of handing over.
The present invention has following good effect:
High density polyethylene (HDPE) forms insoluble not molten " thermosetting property " material after cross-linked polymeric, performances such as its intensity, Young's modulus, chemically-resistant solvent, oil resistant, resistant water significantly improve.Polyethylene thermal change type temperature after crosslinked is increased to 120 ℃, is 1.5 times of common HDPE pipe thermal change type temperature.The performance of its anti-oil and chemical mediator is more excellent than present HDPE simultaneously.The interspersed old pipe technology of repairing of heat cross-linking HDPE pipe is to be only applicable to potable water, domestic sewage, the gas pipeline scope of temperature below 60 ℃ at the interspersed pipe-repairing of common HDPE pipe, expands to the application of the oil below 100 ℃, oilfield sewage, water filling, chemical medium pipeline.It is current advanced a kind of old pipeline rehabilitation new technology.
Description of drawings
Fig. 1 is construction process figure of the present invention.
Fig. 2 is the repair structure schematic representation of crosslinked high density polyethylene (HDPE) bushing pipe of the present invention to old pipeline.
Embodiment
Embodiment 1: the present invention adopts following each component raw material formulated to form by polyethylene pipe production technology commonly used: HDPE high-density polyethylene resin double centner, 20 kilograms of CPE modified resin, 2 kilograms in dibutyl ester class plasticizing agent, 0.5 kilogram in sulfuration bisphenols antioxidant, 2 kilograms of di-ethyl siloxane class crosslinking agents, 1 kilogram of silanol class promoter.
As shown in Figure 1, 2, Φ 188 * 6 crosslinked HDPE pipes 3 that the present invention produces by above prescription intert and repair Φ 219 * 18 filling pipes 4, and concrete construction process is as follows:
The first step: reconnoitre the job site, pipelines trend is understood piping attachment, determines to have dug operating pit between the construction area pipeline opening flange 2 of burn-oning;
Second step: adopt wiper that old pipeline 4 is carried out pigging, remove dirt, obstacle in the pipeline, guarantee the internal surface requirement of bushing pipe construction;
The 3rd step: with imaging monitoring facilities in the CCTV pipeline, pigging quality in the pipeline is checked, judged the technical requirements that whether reaches bushing pipe;
The 4th step: the crosslinked HDPE pipe that adopts constant temperature modification size reducing machine to make carries out constant temperature modification undergauge;
The 5th step: allow crosslinked HDPE pipe behind the undergauge by forming device, with the crosslinked HDPE pipe typing of undergauge;
The 6th goes on foot: the crosslinked HDPE pipe 3 after with tractor undergauge being finalized the design is drawn in the old pipeline 4 to be repaired;
The 7th step: adopt thermofussion welding method welding plastic flange 1 for crosslinked HDPE pipe two ends, carry out end socket and handle;
The 8th step: give in the crosslinked HDPE pipe and fill the thermal medium (90 ℃ of temperature) that contains crosslinking accelerator, heat-insulation pressure keeping makes the crosslinked HDPE pipe of undergauge recover distortion, and carries out cross-linking reaction, and rising simultaneously is affixed in the pipeline of executing lining;
The 9th step: bulge test, check liner mass;
The tenth step: connect head with special bi-directional expansion pipe nipple and handle, recover landforms, the use of handing over.
As shown in Figure 2, intert the crosslinked HDPE external diameter of pipe of usefulness at least than the internal diameter of the pipeline interference 3%~5% of bushing pipe.Interting when executing lining, crosslinked HDPE pipe 3 through constant temperature undergauge modification after, crosslinked HDPE pipe diameter reduces 15%~20%, could guarantee successfully to pull in the pipeline of executing lining, suitable caliber DN100~DN1200 once executes serving as a contrast length about 1000 meters.Interting when executing lining, the pipe applications wiper that is served as a contrast carries out pigging, removes all dirts and obstacle in the pipeline, so that execute lining.Crosslinked HDPE pipe is executed when serving as a contrast in the pipeline interting, and gives heating in the crosslinked HDPE pipe, pressurization, allows it recover modification, and the size of interference guarantees that crosslinked HDPE pipe rising can be close to the inner-walls of duct of executing lining, forms the pipe-in-pipe composite structure.Crosslinked HDPE pipe guarantees that constant temperature at 20~50 ℃, makes crosslinked HDPE pipe be easy to modification when constant temperature modification undergauge, but crosslinked HDPE do not damage, and is also not crosslinked ahead of time.Crosslinked HDPE pipe is executed when serving as a contrast in the steel pipe, will weld plastics flange with thermofussion welding at crosslinked HPDE pipe two ends, is beneficial to ferrule.Crosslinked HDPE pipe interts to be executed when serving as a contrast in the steel pipe, and give in the crosslinked HDPE pipe and charge into 90 ℃ of hot water, pressure-maintaining and heat-preservation, it is crosslinked to allow plastic tube carry out, and crosslinking time is more than 4 hours, and the degree of cross linking reaches 68%~82%.The pipeline of executing lining constitutes steel-plastic composite pipe, the heatproof of crosslinked HDPE pipe, corrosion-resistantly all is better than common HDPE pipe, and the pipeline that this technology is executed lining is excellent in withstand voltage, heatproof, aspect corrosion-resistant.
In the oilfield sewage of salinity 180,000,100 ℃ of following test effects are satisfied, therefore satisfy the oil-field flooding environmental applications.
As shown in Figure 2, in the structure after the present invention repairs, 1 is crosslinked HDPE flange, and 2 is steel flanges, and 3 is crosslinked HDPE pipe, the 4 old pipelines for reparation.
Embodiment 2: the present invention adopts following each component raw material formulated to form by polyethylene pipe production technology commonly used: HDPE high-density polyethylene resin double centner, 50 kilograms of CPE modified resin, 10 kilograms in dibutyl ester class plasticizing agent, 8 kilograms in sulfuration bisphenols antioxidant, 20 kilograms of di-ethyl siloxane class crosslinking agents, 10 kilograms of silanol class promoter.
Φ 154 * 5 crosslinked HDPE pipes by above prescription is produced intert and repair Φ 159 * 6 high water-content crude oil pipelines, and concrete construction process is as follows:
The first step: reconnoitre the job site, pipelines trend is understood piping attachment, determines to have dug operating pit between the construction area pipeline opening flange of burn-oning;
Second step: adopt wiper that old pipeline is carried out pigging, remove dirt, obstacle in the pipeline, guarantee the internal surface requirement of bushing pipe construction;
The 3rd step: with imaging monitoring facilities in the CCTV pipeline, pigging quality in the pipeline is checked, judged the technical requirements that whether reaches bushing pipe;
The 4th step: the crosslinked HDPE pipe constant temperature modification undergauge that adopts constant temperature modification size reducing machine to make;
The 5th step: allow crosslinked HDPE pipe behind the undergauge by forming device, with the crosslinked HDPE pipe typing of undergauge;
The 6th goes on foot: the crosslinked HDPE pipe after with tractor undergauge being finalized the design is drawn in the old pipeline to be repaired;
The 7th step: adopt thermofussion welding method welding plastic flange for crosslinked HDPE pipe two ends, carry out end socket and handle;
The 8th step: give in the crosslinked HDPE pipe and fill the thermal medium (90 ℃ of temperature) that contains crosslinking accelerator, heat-insulation pressure keeping makes the crosslinked HDPE pipe of undergauge recover distortion, and carries out cross-linking reaction, and rising simultaneously is affixed in the pipeline of executing lining;
The 9th step: bulge test, check liner mass;
The tenth step: connect head with special bi-directional expansion pipe nipple (patent) and handle, recover landforms, the use of handing over.
In moisture 85% crude oil medium, contain 0.3%H 2S, 100 ℃ of test effects of temperature are remarkable, therefore use in the high water-content crude oil pipeline of oil field, satisfy technological requirement fully.
The interspersed repairing used pipeline construction process of crosslinked high density polyethylene (HDPE) (HDPE) pipe is applicable to interior reparation of old pipeline of the various materials of DN100~DN1200.Once lining is gone into about 1000 meters of length.

Claims (6)

1, a kind of crosslinked high density polyethylene pipe is characterized in that: adopt following each component raw materials by weight portion formulated to form by polyethylene pipe production technology commonly used:
100 parts of HDPE high-density polyethylene resins
CPE modified resin 20-50 part
Dibutyl ester class plasticizing agent 2-10 part
Sulfuration bisphenols antioxidant 0.5-8 part
Di-ethyl siloxane class crosslinking agent 2-20 part
Silanol class promoter 1-10 part
2, a kind of construction process that adopts the interspersed repairing used pipeline of the described crosslinked high density polyethylene pipe of claim 1 is characterized in that:
The first step: reconnoitre the job site, pipelines trend is understood piping attachment, determines to have dug operating pit between the construction area, and the pipeline opening flange (1) of burn-oning,
Second step: adopt wiper that old pipeline (4) is carried out pigging, remove dirt, obstacle in the pipeline, guarantee the internal surface requirement of bushing pipe construction,
The 3rd step: with imaging monitoring facilities in the central TV pipeline, pigging quality in the pipeline is checked, judged the technical requirements that whether reaches bushing pipe,
The 4th step: the crosslinked HDPE pipe (3) that adopts constant temperature modification size reducing machine to make carries out constant temperature modification undergauge,
The 5th step: allow crosslinked HDPE pipe behind the undergauge by forming device, with the crosslinked HDPE pipe typing of undergauge,
The 6th goes on foot: the crosslinked HDPE pipe after with tractor undergauge being finalized the design is drawn in the old pipeline to be repaired,
The 7th step: adopt thermofussion welding method welded flange (1) for crosslinked HDPE pipe two ends, carry out end socket and handle,
The 8th step: give that to fill the temperature that contains crosslinking accelerator in the crosslinked HDPE pipe be 90 ℃ thermal medium, heat-insulation pressure keeping makes the crosslinked HDPE pipe of undergauge recover distortion, and carries out cross-linking reaction, and rising simultaneously is affixed in the pipeline of executing lining,
The 9th step: bulge test, check liner mass,
The tenth step: connect head with special bi-directional expansion pipe nipple and handle, recover landforms, the use of handing over.
3, the construction process of the interspersed repairing used pipeline of a kind of crosslinked high density polyethylene pipe according to claim 2, it is characterized in that: the crosslinked HDPE external diameter of pipe of interspersed usefulness is than the internal diameter of the pipeline interference 3%~5% of bushing pipe.
4, the construction process of the interspersed repairing used pipeline of a kind of crosslinked high density polyethylene pipe according to claim 2, it is characterized in that: interting when executing lining, after the crosslinked HDPE pipe process constant temperature undergauge modification, crosslinked HDPE pipe diameter reduces 15%~20%, caliber DN100~the DN1200 that is suitable for once executes lining length at 1000 meters.
5, the construction process of the interspersed repairing used pipeline of a kind of crosslinked high density polyethylene pipe according to claim 2 is characterized in that: crosslinked HDPE pipe guarantees that constant temperature is at 20~50 ℃ when constant temperature modification undergauge.
6, the construction process of the interspersed repairing used pipeline of a kind of crosslinked high density polyethylene pipe according to claim 2, it is characterized in that: crosslinked HDPE pipe interts to be executed when serving as a contrast in the steel pipe, give in the crosslinked HDPE pipe and charge into 90 ℃ of hot water, pressure-maintaining and heat-preservation, it is crosslinked to allow plastic tube carry out, crosslinking time is more than 4 hours, and the degree of cross linking reaches 68%~82%.
CN 03126240 2003-07-04 2003-07-04 Cross linking high density polyethylene pipe and construction process of its alternuting repairing old pipe line Expired - Fee Related CN1272564C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 03126240 CN1272564C (en) 2003-07-04 2003-07-04 Cross linking high density polyethylene pipe and construction process of its alternuting repairing old pipe line

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Application Number Priority Date Filing Date Title
CN 03126240 CN1272564C (en) 2003-07-04 2003-07-04 Cross linking high density polyethylene pipe and construction process of its alternuting repairing old pipe line

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CN1272564C true CN1272564C (en) 2006-08-30

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102216662A (en) * 2008-10-31 2011-10-12 博里利斯股份公司 Cross-linked polyethylene pipe
CN101805472B (en) * 2010-04-20 2013-04-17 湖州环友橡塑材料有限公司 Regeneration high-density polyethylene (HDPE) particle used for tubings and manufacture method thereof
CN102128309A (en) * 2010-10-29 2011-07-20 广东联塑科技实业有限公司 Non-excavation steel pipe repair technology
NL1039503C2 (en) * 2012-03-29 2013-12-30 Wavin Bv Device and method for installing a compact pipe within a pipeline.
CN103601943B (en) * 2013-08-16 2016-02-24 安徽省振云塑胶有限公司 A kind of crosslinked PE water service pipe
CN104405998A (en) * 2014-10-16 2015-03-11 烟台中泰管业工程有限公司 Repairing method for adding liner on underground pipe
CN104864176B (en) * 2014-11-24 2016-11-30 长春工业大学 A kind of installation method of oil field gathering and transportation composite metal plastic pipe
CN104747859B (en) * 2015-03-20 2017-01-25 辽宁三和环境工程有限公司 Excavation-free pipeline quick repair method and traction rod for same
CN107940161A (en) * 2017-10-09 2018-04-20 中国石油化工股份有限公司 Pipe repairing method and pipeline for pipeline rehabilitation are met and discussed connection structure
CN109578708A (en) * 2018-10-30 2019-04-05 江苏联冠兆星石化科技有限公司 Unwrapping method in a kind of oriented tube
CN110159867A (en) * 2019-06-05 2019-08-23 保定市金马漏水检测有限公司 Intert PE pipe repairing method in no-dig technique
CN112780878A (en) * 2021-01-15 2021-05-11 中国石油化工股份有限公司西北油田分公司 Process and device for repairing old pipeline by pipeline lining inserting method

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Address after: 457001, Henan, Puyang province Pu east industrial agglomeration area south of the North Ring Road

Patentee after: RICH HIGH-TECH Co.,Ltd.

Address before: 457001, Puyang, Henan province Pu Industrial agglomeration zone, Gaoyang Avenue and new East Road intersection 200 meters West

Patentee before: Henan Rich Pipeline Engineering Technology Co.,Ltd.

Address after: 457001, Puyang, Henan province Pu Industrial agglomeration zone, Gaoyang Avenue and new East Road intersection 200 meters West

Patentee after: HENAN RICH PIPELINE ENGINEERING TECHNOLOGY Co.,Ltd.

Address before: 457000 No. 109, Henan, Puyang, Puyang Zhongyuan cleaning and corrosion protection Co., Ltd.

Patentee before: PUYANG ZHONGYUAN RUICHI CLEANI

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