On-line anticorrosive coating spraying technology for steel pipe

Abstract

The invention relates to an on-line anticorrosive coating spraying technology for a steel pipe. The technology includes the steps of steel pipe preheating, impeller blasting, preheating before coating, anticorrosive paint spraying, steel pipe heating after coating, appearance inspection of an anticorrosive coating, water cooling, thickness inspection of the anticorrosive coating and qualified anticorrosive pipe protecting and stacking. The mode of medium frequency heating is adopted for heating of all heating or preheating workshop sections, and due to the mode of medium frequency heating, the on-line anticorrosive coating spraying technology is fast in heating, high in production efficiency, little in oxidization decarbonization, free of pollution, low in energy consumption, even in heating and high in temperature control accuracy and saves material, and temperature difference between a core and the surface is small. The mode that paints are sprayed continuously on a production line is adopted, so that coating speed is greatly improved, evenness of a coating is good, coating damage caused in the transport process is avoided, coating quality is improved, and pollution to the surroundings is reduced.

Description

technical field [0001] The invention relates to an on-line anticorrosion layer spraying process for steel pipes, which is an anticorrosion paint spraying process capable of effectively preventing the anticorrosion layer from falling off, and belongs to the technical field of anticorrosion pipe coating anticorrosion layers. Background technique [0002] Spraying an anti-corrosion layer on the surface of the steel pipe to turn the steel pipe into an anti-corrosion pipe and enhance the anti-corrosion performance of the steel pipe is a more commonly used anti-corrosion method for steel pipes, which has been recognized by the market. The traditional process of spraying anti-corrosion coating on steel pipes cannot be continuously produced on-line, the production efficiency is low, and the performance of the sprayed anti-corrosion coating is uneven, which greatly increases the performance inspection work of anti-corrosion pipes, and the rework rate is high, resulting in a lot of m...

AI Technical Summary

Problems solved by technology

[0004] 1. The number of transfers is numerous, the time is long, the production efficiency is low, and it is difficult to meet the customer's requirements for delivery time;

[0005] 2. Frequent transfer and lifting will easily cause secondary pollution of the steel pipe after rust removal; and it will easily damage the uncured coating, using a lot of manpower and material resources and increasing labor costs;

[0006] 3. When spraying, the solvent volatilizes into the surrounding air, affecting human health and polluting the environment