... , SSAW, Galvanized Steel Pipe, Electric-resistance Welded Steel Pipe, Electric-fusion Welded Steel PipeSpiral Welded Steel Pipe, Hot-rolling Seamless Pipe, Cold-rolling Seamless PipeStandardASTM, DIN ... ,P22,P91;A231 T5,T9,T11,T12,T22,T23,T91;Q235, Q195, Q345, 20#, A53(A,B), 10#, 16Mn, A106(B ...