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Seamless steel pipe for coal mine

A technology for seamless steel pipes and coal mines, applied in the field of steel pipes, can solve the problems of increasing the cost of anti-corrosion and descaling, poor corrosion resistance, easy scaling, etc., to save the cost of anti-corrosion and descaling, high reliability, The effect of not easy to scale

Inactive Publication Date: 2014-12-03
WUXI HAOHAO STEEL PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the steel pipes currently used in coal mines have poor corrosion resistance and are prone to scaling, so they are not suitable for underground transportation of media containing sulfur, calcium, and magnesium ions, which increases the cost of anti-corrosion and descaling

Method used

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Embodiment Construction

[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0013] Embodiments of the invention include:

[0014] A seamless steel pipe for coal mines, comprising: a steel pipe body, a first corrosion-resistant strengthening layer, a second corrosion-resistant strengthening layer, a first anti-scaling layer, a second anti-scaling layer and a nickel-cobalt alloy coating, the steel pipe The outer surface of the body is coated with the nickel-cobalt alloy coating, the inner surface of the steel pipe body is provided with the first corrosion-resistant strengthening layer, and the...

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Abstract

The invention discloses a seamless steel pipe for a coal mine. The seamless steel pipe comprises a steel pipe body, a first corrosion-resistant reinforced layer, a second corrosion-resistant reinforced layer, a first scaling prevention layer, a second scaling prevention layer and a nickel-cobalt alloy plated layer, wherein the outer surface of the steel pipe body is plated with the nickel-cobalt alloy plated layer; the first corrosion-resistant reinforced layer is arranged on the inner surface of the steel pipe body; the second corrosion-resistant reinforced layer is arranged on the outer surface of the nickel-cobalt alloy plated layer; the first scaling prevention layer is arranged on the outer surface of the first corrosion-resistant reinforced layer; the second scaling prevention layer is arranged on the outer surface of the second corrosion-resistant reinforced layer. Through the adoption of the scheme, the seamless steel pipe is excellent in corrosion resistance, less easy to scale, and suitable for being used for conveying media containing sulfur, calcium and magnesium ions underground, and reduces the cost for corrosion protection and descaling.

Description

technical field [0001] The invention relates to the field of steel pipes, in particular to a seamless steel pipe for coal mines. Background technique [0002] China is the world's largest coal-producing country, with coal production accounting for 30% of the world's total. As China's main energy source, the safe production of coal resources is a major issue that is related to the continued stable development of the national economy and society, as well as national energy security. [0003] Pipelines must be used in the five aspects of water supply, drainage, slurry discharge, ventilation, and gas discharge in coal mines. Among enterprises that use pipes, about 95% of them use steel pipes, mainly in small and medium-sized coal mines; 3% of coal mines use plastic pipes, mainly in large and medium-sized coal mines. [0004] However, the steel pipes currently used in coal mines have poor corrosion resistance and are prone to scaling, so they are not suitable for underground tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/14F16L58/02
CPCF16L9/14F16L58/04
Inventor 吴君玉
Owner WUXI HAOHAO STEEL PIPE