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Processing method of anti-corrosion and anti-ultraviolet exposed steel gas pipeline

An anti-ultraviolet and gas pipeline technology, which is applied in pipeline protection, pipeline anti-corrosion/rust protection, pipeline damage/wear prevention, etc., to achieve good adhesion, prolong service life, and protect human health and ecological environment.

Active Publication Date: 2017-11-07
四川科迪燃气管道防腐有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to change the current situation of traditional anti-corrosion backwardness, provide an anti-corrosion and anti-ultraviolet exposed steel that protects human health and ecological environment, eliminates potential safety hazards caused by corrosion, improves service life, and ensures safe and stable gas supply in the gas industry Processing method of gas pipeline

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  • Processing method of anti-corrosion and anti-ultraviolet exposed steel gas pipeline

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Embodiment Construction

[0044] The processing method of the anti-corrosion and anti-ultraviolet exposed steel gas pipeline in this embodiment includes the following steps:

[0045] 1) Rust removal: Before coating the outer surface of the steel pipe, use a shot blasting machine to remove oil, grease and any other impurities attached to the outer surface of the steel pipe. Before shot blasting, the steel pipe should be preheated to remove moisture, and the surface temperature of the pipe should be kept at least 3°C ​​higher than the dew point temperature, but it should be lower than 150°C during the blasting treatment and inspection. After blasting and derusting, the remaining steel shots / sand grains and rust powder and dust on the inner and outer surfaces of the steel pipe should be removed. Surface defects that may affect the quality of the coating, such as welds, edges and other areas, are treated and meet the P2 level specified in GB / T 8923.3-2009. The grade of blasting rust removal on the outer s...

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Abstract

The invention discloses a processing method of a corrosion-resistant uvioresistant exposed steel gas pipeline. The processing method comprises the following steps of 1) rust removal of steel pipes; 2) medium frequency heating; 3) sequential spraying of a corrosion-resistant layer, a connecting layer and an uvioresistant layer, wherein the corrosion-resistant layer adopts fusion bonded epoxy powder, the connecting layer adopts grafted copolymer powder, the uvioresistant layer adopts fusion bonded polyester powder, the fusion bonded epoxy powder, the grafted copolymer powder and the fusion bonded polyester powder are sequentially and uniformly sprayed on the heated steel pipes through adopting the electrostatic spraying method, the primary gas of an electrostatic sprayer is controlled to be 0.1-0.2 MPa, the secondary gas is controlled to be 0-0.1 MPa, and the electrostatic voltage is controlled to be 60-90 KV; 4) fusion leveling; 5) cooling for solidification; 6) examination; and 7) packaging for storage. The corrosion-resistant uvioresistant exposed steel gas pipeline produced through the method has the beneficial effects that the human health and the ecological environment are protected, potential safety hazards caused by corrosion are eliminated, the service life is prolonged, and the safe, smooth and steady gas supply of the gas industry is guaranteed.

Description

Technical field: [0001] The invention is mainly used in the field of anti-corrosion of outdoor or exposed gas pipelines, and particularly relates to a processing method for anti-corrosion and anti-ultraviolet exposed steel gas pipelines at a temperature of -30°C to 100°C. Background technique: [0002] Before the anti-ultraviolet (UV) three-layer anti-corrosion technology appeared, the gas pipelines (outdoor risers and indoor pipelines) used by most domestic gas companies on the ground mostly used steel pipes (welded pipes and seamless pipes). Anti-corrosion and paint anti-corrosion can only be used for three to five years. With the acceleration of urbanization, the scarcity of land resources and the large number of high-rise buildings have increased the workload and difficulty of gas pipeline maintenance and replacement for various gas companies, and there are certain safety hazards. Due to the restrictions on the material, wall thickness, lightning protection, fire preven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02F16L58/04F16L57/00
CPCF16L9/02F16L57/00F16L58/04
Inventor 陈抒怀
Owner 四川科迪燃气管道防腐有限公司
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