Comprehensive Guide to Coated Composite Steel Pipes

Steel pipes are the core carrier of fluid transportation in municipal, industrial, mining and construction engineering. Ordinary carbon steel pipes are prone to rust, scaling and medium erosion when exposed to water, sewage, acid and alkali soil, which shortens service life and brings hidden risks to pipeline systems. Coated composite steel pipes solve these pain points by adding high-performance protective coating on the inner and outer wall of carbon steel substrate.

There are two mainstream anti-corrosion types widely used in engineering: epoxy coated steel pipe and 3PE three-layer polyethylene coated welded carbon steel pipe.Epoxy coated composite steel pipe adopts food-grade epoxy inner lining. It features smooth inner wall, non-toxic and harmless property. It can be used for drinking water transmission, municipal sewage delivery, industrial wastewater transportation. The red epoxy coated version is specially developed for fire protection sprinkler and hydrant pipeline systems, easy for on-site identification, high pressure resistant and anti-scaling.

3PE three-layer polyethylene coated welded carbon steel pipe is the preferred solution for underground buried pipelines. The three-layer composite structure provides excellent anti-corrosion performance, especially suitable for saline-alkali soil environment. It effectively resist soil salt and alkali erosion, widely used for buried oil, gas, water delivery pipelines.

Black epoxy/PE coated mining anti-corrosion steel pipe is customized for underground mine working conditions. It can withstand mine sewage, acid and alkali medium corrosion, applied in mine water supply, drainage and ventilation systems, and can provide MA mine safety certification.