Steel pipe anticorrosive coating processing technology

A processing technology and anti-corrosion layer technology, applied in the field of anti-corrosion pipe processing technology, can solve the problems of high processing cost of pipeline anti-corrosion layer processing technology, poor resistance to temperature difference change, easy cracking and delamination, etc. The effect of strong adhesion and long service life

Inactive Publication Date: 2014-07-09
赵景军
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high processing cost, easy cracking and delamination, short service life and poor resistance to temperature difference changes in pipeline anti-corrosion coating processing technology

Method used

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Embodiment Construction

[0006] The present invention will be further described below:

[0007] The steel pipe anti-corrosion layer processing process includes stainless steel joints at both ends of the steel pipe, a modified asphalt layer and a plastic layer outside the steel pipe, and is characterized in that it includes the following steps:

[0008] A. Connect stainless steel joints at both ends of the steel pipe: use a friction welding machine to weld the stainless steel joints on both ends of the steel pipe to improve the anti-corrosion effect of the steel pipe joints;

[0009] B. Derusting the outer surface of the steel pipe: use a closed shot blasting derusting machine to remove rust, oil and sludge on the outer surface of the steel pipe;

[0010] C. Preheating of the outer surface of the steel pipe: Preheat the outer surface of the steel pipe to 50-70 degrees with a spiral preheater;

[0011] D. Asphalt coating: high-speed mixing to form a uniform modified asphalt powder. Extrude the asphalt ...

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Abstract

Provided is a steel pipe anticorrosive coating processing technology. The problem that a pipeline anticorrosive coating processing technology is high in processing cost, short in service life and poor in temperature change resisting performance and easily causes cracking and drop is mainly solved. The steel pipe anticorrosive coating processing technology is characterized by comprising the steps of (A) connecting stainless steel connectors to two ends of a steel pipe; (B) removing rust on the outer surface of the steel pipe; (C) preheating the outer surface of the steel pipe, namely using a heating machine to preheat the outer surface of the steel pipe to be 30-40 DEG C; (D) coating pitch, namely using a pitch extruding machine circular die to extrude pitch to coat the steel pipe outer surface in a negative-pressure mode and forming a pitch anticorrosive coating with 1-10mm thickness on the pipe steel outer surface; (E) coating plastic, namely using a plastic extruding machine circular die to extrude plastic to cover the outer surface of the pitch and forming a plastic anticorrosive coating with 1-10mm thickness on the pitch outer surface; (F) performing water-cooling shaping; (G) dividing and cutting ends, namely using a cutting machine to cut excessive pitch anticorrosive coatings and plastic anticorrosive coatings at two ends of the steel pipe. The steel pipe anticorrosive coating processing technology has the advantages of being low in processing cost, not prone to cracking and drop, long in service life and good in temperature change resisting performance.

Description

Technical field: [0001] The invention relates to a processing technology for an anti-corrosion pipe, in particular to a processing technology for a steel pipe anti-corrosion layer. Background technique: [0002] With the continuous development of my country's petroleum and petrochemical industries, oil and gas pipelines are an important organizational part in the development of oil and gas fields and the process of oil and gas transportation. Pipelines are connected by steel pipes, and pipeline corrosion problems seriously affect the safe and efficient operation of pipelines. The steel pipe anti-corrosion layer adopts modified asphalt and plastic, and the processing technology of the pipeline anti-corrosion layer has high processing cost, easy cracking and delamination, short service life, and poor temperature resistance change performance, which affect the service life of the steel pipe. Invention content: [0003] In order to solve the problems of high processing cost, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/02F16L58/12F16L58/10
CPCF16L58/109F16L58/12F16L58/181
Inventor 赵景军
Owner 赵景军
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