... -1200mm Series:200/300/400 Seamless.welded,hot rolled,col large diameter seamless stainless steel pipeStandard: JIS, AISI, ASTM, GB, DIN ... , DIN, JIS, T14975, etc.4.Out Diameter: 6-830 mm5.Wall Thickness:0.5-40 mm6.Length:SPECIFIC OR AT RANDOM ... Certificate is supplied with shipment, Third Part Inspection is acceptable. large diameter seamless stainless steel pipe