Plastic coated steel pipe for coal mine

The plastic-coated steel pipe is a steel pipe as the base, with a layer of plastic anti-corrosion layer welded on the inner surface of the steel pipe (bottom pipe) through spraying, rolling, dipping and suction processes, or a steel-plastic composite steel pipe with a plastic anti-corrosion layer welded on the inner and outer surfaces. It is corrosion-resistant and has low friction.