large diameter seamless stainless steel pipe OD:6-1000mm WT:1-1200mm Series:200/300/400 Seamless.welded,hot rolled,col large diameter ... normal standard toleranceShape: round,square,rectangularsurface: pickled, acid, polished, black,ectcertificate: ISO, BV, API, CSC,DNV,ectnormal length: 1000mm, ... supplied with shipment, Third Part Inspection is acceptable. large diameter seamless stainless steel pipe