... Steel Pipe, Hot-rolling Seamless Pipe, Cold-rolling Seamless PipeStandardASTM, DIN, GB, BS, JIS, ASME, API, AISI,, ANSIGradeA333 GR3, ... A53(A,B), 10#, 16Mn, A106(B,C), 45#, API J55, API K55, St52, Q215, API N80, St37, API L80, API P110, St42, St45, St52.4API 5L A, B ... Thickness2-59.54mmLengthSingle Random Length, Double Random Length or According to customers' requirements.Surface Treatment3PE, 3PP,EP ...