How to do the internal and external corrosion prevention of spiral steel pipe?
The internal and external anti-corrosion practices of spiral steel pipes (SSAW) should meet the requirements of the design institute and the owner. Generally, the internal and external anti-corrosion process of spiral steel pipes is as follows: base surface treatment, rust removal, welding slag → allocation of paint → intermediate paint → brush or spray construction → maintenance, no The anti-corrosion properties of spiral steel pipes are different in different application scenarios. The indexes of the internal and external anti-corrosion coatings of spiral steel pipes used for drinking water should meet the testing requirements of the Ministry of Health of the State for the hygiene and safety of drinking water. 1. Classification of external anti-corrosion practices for spiral steel pipes (1) Indoor and outdoor exposed steel pipes and fittings Use ordinary grade anti-corrosion. After the pipe surface is derusted and cleaned up, brush two coats of H53-22 epoxy iron red anti...