... -1200mm Series:200/300/400 Seamless.welded,hot rolled,col large diameter seamless stainless steel pipeStandard: JIS, AISI, ASTM, GB, ... produce general purpose parts, cutting tools, mechanical parts, petroleum refining equipment, bolts and nuts, pump rods, and kitchenware. Inspection:Chemical ... is supplied with shipment, Third Part Inspection is acceptable. large diameter seamless stainless steel pipe