Anti-drop method used for sintering epoxy powder anti-corrosive counterweight tube

A technology of sintering epoxy powder and counterweight pipe, which is applied in the direction of anti-corrosion/anti-rust protection of pipelines, pipes, rigid pipes, etc., can solve the problems of easy slippage of the coating and poor bonding performance, and achieves enhanced working conditions. The effect of improving the resistance to shearing

Inactive Publication Date: 2007-10-31
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the smooth outer surface of the epoxy powder anti-corrosion coating, the bonding performance between the coating and the concrete coating is poor, and slipping between the coatings is easy to occur when the pipeline is laid

Method used

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  • Anti-drop method used for sintering epoxy powder anti-corrosive counterweight tube
  • Anti-drop method used for sintering epoxy powder anti-corrosive counterweight tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The surface of the steel pipe is sandblasted, and a layer of fusion-bonded epoxy powder anti-corrosion layer is coated on the outside of the steel pipe. The anti-corrosion layer is coated with a polyolefin copolymer adhesive for bonding non-slip particles, and the anti-slip particles are coated with polyethylene-based resin on the adhesive. Granules, and finally carry out the coating construction of the concrete counterweight layer, and a reinforcement layer is arranged in the concrete counterweight layer, which is reinforced by a steel mesh structure. After testing, the shear resistance between the anti-corrosion layer of the weight pipe and the concrete coating is greater than 0.1N / mm 2 .

Embodiment 2

[0024] The surface of the steel pipe is sanded, and a layer of fusion-bonded epoxy powder anti-corrosion layer is coated on the outside of the steel pipe. The anti-corrosion layer is coated with a polyolefin copolymer adhesive for bonding non-slip particles, and anti-slip particles are coated on the adhesive. Polypropylene-based resin Granules, and finally carry out the coating construction of the concrete counterweight layer, and a reinforcement layer is arranged in the concrete counterweight layer, which is reinforced by a steel mesh structure. After testing, the shear resistance between the anti-corrosion layer of the weight pipe and the concrete coating is greater than 0.1N / mm 2 .

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Abstract

The invention discloses an anti-slip and anti-run method used for hot-melt epoxy powder antiseptic additional weight, comprising (1) sanding process on the surface of steel pipe, (2) wrapping an antiseptic layer of hot-melt epoxy powder outside of the steel pipe, (3) wrapping adhesive which is olefin copolymer outside of the antiseptic layer, (4) daubing anti-slip particles which are polyethylene or profax particles on the adhesive, (5) daubing concrete additional weight layer on the anti-slip particles. The invention using the anti-slip technology increases the shear capacity of the antiseptic layer and the concrete layer and the adaptability for working condition of sea pipe-laying.

Description

technical field [0001] The invention relates to an anti-slip technology between a pipeline anti-corrosion layer and a counterweight layer, in particular to an anti-slip method for fusion-bonded epoxy powder anti-corrosion counterweight pipes, which is applicable to the technical field of submarine pipelines. Background technique [0002] At present, the structure of the fusion-bonded epoxy powder anti-corrosion weight pipe is "working steel pipe + epoxy anti-corrosion layer + concrete weight layer". Due to the smooth outer surface of the epoxy powder anti-corrosion coating, the bonding performance between it and the concrete coating is poor, and slipping between the coatings is easy to occur when the pipeline is laid. Contents of the invention [0003] The purpose of the present invention is to provide an anti-slip method suitable for fusion-bonded epoxy powder anti-corrosion weight pipes, which improves the shear resistance of the anti-corrosion layer and the concrete wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/14F16L58/04
Inventor 张晓灵林建高国军吴文通宋文忠顾艳吕喜军
Owner CHINA NAT OFFSHORE OIL CORP
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