Plastic-lined steel pipes, based on galvanized seamless steel pipes and welded steel pipes, after removing the weld ribs from the inner wall, food-grade polyethylene (PE) pipe material with the same diameter as the galvanized pipe is inserted. The thickness of the polyethylene lining must meet the HG/T 20538-2016 standard. After being compressed and heated for a certain period, it is shaped, serving as an upgraded product of the traditional galvanized pipe.
