... :ISO 9001;2008 5)Length:2-12m ERW Steel Pipe O.D19.5—630 mmW.T0.6 ... normal; also according to customers’ requirementsStandardBS, ASTM, EN, API 5L, API 5CT, DIN, GB/T, etc.TechniqueweldedProduct CategoryMetallurgy, Mineral ... EnergyMaterialQ195/Q215/Q235/Q345/A53(A.B)CertificatesISO, API 5L, API 5CT, CE, etc.Surface TreatmentsBlack Vanished, PP,PE ... time: 10 to 40 days ERW Steel Pipe for construction