Plastic-lined steel pipes, based on galvanized seamless steel pipes and welded steel pipes, with the inner wall weld beads 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 being compressed and heated for a certain period, it takes the shape of an upgraded product compared to traditional galvanized pipes.
