Internal And External Anti-Corrosion Of Spiral Steel Pipe

Spiral steel pipe (SSAW) is formed from narrower sheets or hot-rolled coils, which is suitable for transporting large quantities of oil and gas. Generally, the internal and external anti-corrosion process of spiral steel pipe is: base surface treatment→rust removal, welding slag→preparation Paint→intermediate paint→brushing or spraying construction→maintenance. This article will introduce in detail how to perform internal and external anti-corrosion of spiral steel pipes.

1. Classification Of External Anti-Corrosion Practices For Spiral Steel Pipes

(1) Indoor and outdoor exposed steel pipes and pipe fittings

Use ordinary grade anti-corrosion. After derusting and cleaning the surface of the pipe, apply two coats of H53-22 epoxy iron red anti-rust primer and two coats of IPN8710-2C anti-corrosion topcoat.

(2) Indoor buried steel pipes and fittings

Use ordinary grade anti-corrosion. After derusting and cleaning the surface of the pipe, apply two coats of H53-22 epoxy iron red anti-rust primer and two coats of IPN8710-2C anti-corrosion topcoat.

(3) Directly buried and water-immersed steel pipes and pipe fittings (non-pipe jacking construction)

Special steel bars are used for anti-corrosion. After derusting and cleaning the pipe surface, apply one layer of IPN8710-3 anti-corrosion primer, apply three layers of IPN8710-3 thick anti-corrosion topcoat, and lay two layers of glass fiber cloth in the tundish.

(4) Special steel pipe for pipe jacking

External anti-corrosion: After derusting and cleaning the pipe surface, apply H53-22 epoxy iron red anti-rust primer twice and H52-19 epoxy glass flake anti-corrosion topcoat twice.

2. Classification Of Anti-Corrosion Practices In Spiral Steel Pipes

(1) Anti-corrosion of drinking water pipelines will

After the dirt and rust spots on the inner wall surface are removed and wiped clean, apply two layers of IPN8710-2B anti-corrosion primer and two layers of topcoat.