... 4)Certificates:ISO 9001;2008 5)Length:2-12m ASTM Black Steel PipeO.D19—630 mmW.T0.6-35 mmO.D ... )CertificatesISO, API 5L, API 5CT, CE, etc.Surface TreatmentsBlack Vanished, PP,PE,3PE,Galvanized etc.UsageConstruction, water heating, car manufacturing, electrical ... /CIF/CFRMOQ: 22 tonsDelivery time: 10 to 45 days ASTM Black Steel Tube