Natural gas pipe anticorrosion coating method and device thereof

Abstract

The invention discloses a natural gas pipe anticorrosion coating method and a device thereof. The natural gas pipe anticorrosion coating method comprises the following steps of (1) installation, (2) shot-blasting derusting, (3) heating, (4) electric arc thermal spraying, (5) surface paint spraying, (6) curing, film-forming, one-two-minute still standing for curing, and completion. The natural gas pipe anticorrosion coating device comprises a coating conveying device, a derusting device, a medium-frequency induction heating device, a spraying device and a steel pipe moving out device. The derusting device, the medium-frequency induction heating device, the spraying device and the steel pipe moving out device are sequentially arranged on the coating conveying device. According to the natural gas pipe anticorrosion coating method and the device thereof, the method is simple and easy to operate; the manufacturing cost is reduced; the weather resistance and the adhesive force are high, and the adhesive force of a paint is more than ten times that of ordinary paints; environmental protection is achieved, an epoxy zinc rich primer and a mixed yellow paint special for gas are used as sprayed materials, and no pollution exists; the corrosion resistance is high and the service life is long. The natural gas pipe anticorrosion coating device is compact in structure, low in manufacturing cost and high in production efficiency.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coating, and in particular relates to an anti-corrosion coating method for natural gas pipes and processing equipment thereof. Background technique [0002] 3PE steel pipe is a buried pipe and does not need weather resistance. Now the gas pipes in various urban communities are open-air pipes, which must have strong weather resistance. The existing natural gas pipes have poor weather resistance, are easy to corrode, and have a short service life. [0003] In the coating processing method of the prior art, the steel pipe to be coated is first placed on the coating transmission line, then shot blasted to remove rust, then heated by the first intermediate frequency and the second intermediate frequency, sprayed with epoxy powder, and then wound on Adhesive and polyethylene flakes are ready after cooling. This coating method is complex and difficult to operate. The coating used does not pollute the envir...

AI Technical Summary

Problems solved by technology

Now the gas pipes in various urban communities are open-air pipes, which must have strong weather resistance. The existing natural gas pipes have poor weather resistance, are easy to corrode, and have a short service life.

[0003] In the coating processing method of the prior art, the steel pipe to be coated is first placed on the coating transmission line, then shot blasted to remove rust, then heated by the first intermediate frequency and the second intermediate frequency, sprayed with epoxy powder, and then wound on Adhesive and polyethylene flakes are ready after cooling. This coating method is complex and difficult to operate. The paint used does not pollute the environment, has low adhesion, poor weather resistance, and high manufacturing costs.

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