Description:
Introduction to the production process of plastic-coated composite steel pipe Plastic-coated composite steel pipes are divided into: hot-dipping process, internal and external spraying process, rotational molding process, shower coating process, suction coating process, fusion winding process, etc. 1. Hot dipping method: fluidized bed dipping, one-time film forming method. Also known as the first generation of anti-corrosion plastic coated steel pipe, polyethylene inside and outside. 2. Internal and external spraying process: Using electrostatic adsorption theory, through pre-treatment of steel pipes, spray polyethylene or epoxy resin powder with a spray gun. Also known as the second-generation anti-corrosion plastic-coated steel pipe, epoxy composite steel pipe inside and outside. |
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