... steel pipemainly trades in all kinds of welded Steel Pipes and Tubes such as OCTG, Line Pipes, as well as ... , Mechanical, Square & Rectangular Tubes, Conduit Pipes, Stainless and Relevant Pipe Fittings and Valves under world standard of ASTM / ASME, API, ... , Canada, Europe and Southeast Asia, especially we have long-term good business cooperation with such as Toyota, Minmetals and Van Leeuwen etc.