Plastic-lined steel pipes, based on galvanized seamless steel pipes and welded steel pipes, with the inner wall weld ribs removed, lined with food-grade polyethylene (PE) pipe material of the same diameter as the galvanized pipe. The thickness of the polyethylene lining must meet the standard HG/T 20538-2016. After a certain period of pressure and heat treatment, it is shaped into a product that is an upgraded version of the traditional galvanized pipe.
