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Cross linking high density polyethylene pipe

A technology of high-density polyethylene and polyethylene pipes, applied in the direction of pipes, rigid pipes, pipe components, etc., can solve the problems of oil pipelines and high-temperature pipelines that are prone to high-temperature softening, interspersed repairs of old pipelines, etc. Excellent chemical medium, performance improvement, excellent performance effect

Inactive Publication Date: 2006-08-30
RICH HIGH TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the technology of interspersing and repairing old pipelines, since the existing PE pipes on the market can only withstand a temperature of 60°C, they are only suitable for fields such as gas and domestic sewage below 60°C, while oil pipelines and high-temperature pipelines are prone to high-temperature softening and oil problems such as melting, the application of interspersed repair of old pipeline technology has been greatly restricted

Method used

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Effect test

Embodiment 1

[0026] Embodiment 1: the present invention adopts the preparation processing of following each component raw material through common polyethylene pipe production technology: HDPE high-density polyethylene resin 100 kilograms, CPE modified resin 20 kilograms, dibutyl ester plasticizer 2 kilograms, 0.5 kg of sulfurized bisphenol antioxidant, 2 kg of diethylsiloxane crosslinking agent, and 1 kg of silanol accelerator.

[0027] Such as figure 1 , 2 As shown, the Φ188×6 cross-linked HDPE pipe 3 produced by the present invention according to the above formula is interspersed to repair the Φ219×18 water injection pipe 4. The specific construction process is as follows:

[0028] Step 1: Survey the construction site, detect the direction of the pipeline, find out the pipeline accessories, determine the construction area, dig the operation pit, and weld the flange 2 on the pipeline mouth;

[0029] Step 2: Use a pig to pig the old pipeline 4 to remove the dirt and obstacles in the pipe...

Embodiment 2

[0041] Embodiment 2: the present invention adopts the preparation and processing of following each component raw material through common polyethylene pipe production technology: HDPE high-density polyethylene resin 100 kilograms, CPE modified resin 50 kilograms, dibutyl ester plasticizer 10 kilograms, 8 kg of sulfurized bisphenol antioxidants, 20 kg of diethylsiloxane crosslinking agents, and 10 kg of silanol accelerators.

[0042] The Φ154×5 cross-linked HDPE pipe produced according to the above formula is interspersed to repair the Φ159×6 high water content crude oil pipeline. The specific construction process is as follows:

[0043] The first step: survey the construction site, detect the direction of the pipeline, find out the pipeline accessories, determine the construction area, dig the operation pit, and weld the flange on the pipeline mouth;

[0044] Step 2: Use a pig to clean the old pipeline, remove the dirt and obstacles in the pipeline, and ensure the inner surface...

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Abstract

In the present invention, cross-linked polyethylene pipe is made of materials with HDPE high density polyethylene resin, CPE modified resin, dibutyl ester plastifier, bisphenol sulfide antiorygen, diethyl siloxane cross linked agent and silicon alcohol promoter. The process flow is as of cleaning pipe with cleaner, inspecting inside of pipe, forming cross linked polyethylene pipe, hot melt welding, necking down by constant temperature deformation, pulling it to inside of pipe to be repaired, welding flange, recovering deformation and heating, checking quality of lining pipe and connecting heads for finishing.

Description

technical field [0001] The invention belongs to the technical field of non-excavation repair of old pipelines, in particular to a cross-linked high-density polyethylene pipe used in the technology of inserting and repairing old pipelines. Background technique [0002] In the technology of interspersing and repairing old pipelines, since the existing PE pipes on the market can only withstand a temperature of 60°C, they are only suitable for fields such as gas and domestic sewage below 60°C, while oil pipelines and high-temperature pipelines are prone to high-temperature softening and oil Dissolution and other problems have greatly restricted the application of interspersed repair of old pipeline technology. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for the original HDPE pipe production technology, by adding a special cross-linking agent to increase the temperature resistance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/12C08L23/04F16L55/16
Inventor 刘素平张清旭张金成王永洪
Owner RICH HIGH TECH CO LTD
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