... according to customers’ requirementsStandardBS, ASTM, EN, API 5L, API 5CT, DIN, GB/T, etc.TechniqueweldedProduct CategoryMetallurgy, Mineral ... Q215/Q235/Q345/A53(A.B)CertificatesISO, API 5L, API 5CT, CE, etc.Surface TreatmentsBlack Vanished, PP, ... PE,3PE,Galvanized etc.UsageConstruction, water heating, car manufacturing, electrical installation and ...