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Wrapping belt for pipeline repaired opening corrosion prevention and construction method

A construction method and technology of wrapping tape, applied in the direction of pipe elements, pipes/pipe joints/pipe fittings, coatings, etc., can solve the problems of low tensile strength of PE layer, affecting the service life of pipes, unstable peel strength, etc. Reduce construction labor intensity, eliminate differences in human operation, and improve the effect of anti-corrosion quality

Active Publication Date: 2017-10-17
四川久远辐射技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the peel strength between the hot melt adhesive and the epoxy primer is not high; the peel strength between the hot melt adhesive and PE is not high; the tensile strength of the PE layer is not high, etc.
Secondly, manual operation causes random residual air bubbles between the hot melt adhesive and the epoxy primer; during the barbecue process, it is easy to have unstable peel strength due to insufficient softening time of the hot melt adhesive, which affects the service life of the pipeline and increases the construction time. cost

Method used

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  • Wrapping belt for pipeline repaired opening corrosion prevention and construction method
  • Wrapping belt for pipeline repaired opening corrosion prevention and construction method
  • Wrapping belt for pipeline repaired opening corrosion prevention and construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: as figure 1 , 3 Shown: the present invention provides a kind of wrapping tape for pipe joint anticorrosion, the wrapping tape is composed of hot melt adhesive and PE material layer, PE material layer 1, hot melt adhesive layer 3 successively from the surface to the bottom, this embodiment Set any lengthwise side of the wrapping tape as a slope 2, and the slope slopes downward from the PE material layer 1 to the hot melt adhesive layer 3, the inclination angle is set to 8°, and the wrapping tape width is set to 240mm. Due to the softness of the hot melt adhesive layer 3 of the final product, the edge of the hot melt adhesive will be jagged when cutting, and the appearance of the product is not beautiful enough, but it does not affect the quality of the product. Forms a seamless wrap.

[0029] In the specific construction, special adhesives with better performance than hot melt adhesives are selected as the carrier between the epoxy primer and the winding ...

Embodiment 2

[0035] Embodiment 2: as figure 2 , 3 Shown: the present invention provides a kind of wrapping tape for pipeline joint anticorrosion, and this wrapping tape is made up of hot-melt adhesive layer and PE material layer, is PE material layer 1 and hot-melt adhesive layer 3 successively from surface to bottom, this embodiment For example, set the side of any length direction of the wrapping tape as slope 2, and the slope only contains the PE material layer, and the hot melt adhesive layer remains the same; at the same time, the slope direction of the slope is downward from the direction indicating the bottom surface , the inclination angle is set to 12°, and the width of the wrapping tape is set to 80mm. The produced winding tape has neat sides and beautiful appearance.

[0036] The specific method is the same as in embodiment 1, except that the winding tape of the last circle covers half the width of the winding tape of the last circle when winding.

[0037] In Example 1 and E...

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Abstract

The invention discloses a wrapping belt for pipeline repaired opening corrosion prevention and a construction method. The wrapping belt is composed of a hot melting adhesive layer and a PE material layer. The PE material layer and the hot melting adhesive layer are arranged in sequence from the surface to the bottom face, and the side edge of the wrapping belt is a slope. According to the wrapping belt and the construction technology, the product performance and the construction quality stability can be effectively improved, the cooperative construction technology comprising the steps of spraying epoxy primer (formed by curing epoxy powder) to the surface of a pipeline and then adopting a special adhesive (hot melting adhesive) and the special (high-strength) PE material layer for forming the wrapping belt is adopted, the problem of construction quality instability is solved, the anti-corrosion quality and the reliability are improved, and the product service life is prolonged.

Description

technical field [0001] The invention relates to an anti-corrosion treatment technology for joint joint welding of pipelines, in particular to a special wrapping tape and construction technology for joint anti-corrosion of pipeline joints which are especially suitable for cylindrical steel pipelines. Background technique [0002] At present, domestic cylindrical steel pipes have a layer of anti-corrosion structure on their surface when they leave the factory to increase the service life of the pipes. In the actual installation process, the pipeline is often connected by several sections of pipelines, so it is necessary to carry out anti-corrosion operations on the adjacent pipelines at the connection. [0003] Joint anticorrosion is usually done by using a heat shrink tape or heat shrink sleeve similar to the material composition of the anticorrosion layer on the surface of the pipeline. This heat shrink tape or heat shrink sleeve is mainly composed of epoxy primer, hot melt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/10F16L55/17
CPCF16L55/17F16L58/1063
Inventor 刘亚东李东
Owner 四川久远辐射技术有限公司
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