... of carbon steel, alloy steel, stainless steel pipes/tubes Our company trades all kinds of carbon steel, alloy steel, stainless steel pipes/tubes ... materials that are imported or domestic production to service steel pipe:Steel standard: ASTM, JIS, DIN, GB, EN, ... confirmed by clientsMarking as per customers requirementsApplication: Seamless steel pipes for equipment, pipelines, vessels, pipe fittings ...