The industry belongs to the metal products industry, and its business scope includes: The production of high, medium and low pressure steel pipes, flanges, elbows, tees, heads, pipe caps, manholes, support and hangers, and blind plates; Sales of filters, compensators, insulating joints, spring supports and hangers, bolts, gaskets, oil casing, plastic lining anti-corrosion and insulation pipes, wear-resistant pipes, high-pressure pipelines, alloy pipes, pipe fittings, power plant accessories, machine tool accessories, sports equipment, transportation machinery and engineering construction, mechanical and electrical and hardware, building materials, PE pipes and fittings, plumbing accessories, labor protection supplies, electronic products, instrumentation, rubber products, acoustic tubes, grouting pipes, mechanical equipment and accessories, steel plates, steel belts, clothing, shoes and hats, international trade, Self-support and agency import and export business of goods