... tubes, oval pipes, special shaped pipes, empaistic pipes, fittingsStandardASTM A106-2006,ASTM A210-1996,GB 5130,API 5L,DIN EN 10217 ... tubes, oval pipes, special shaped pipes, empaistic pipes, fittingsStandardASTM A106-2006,ASTM A210-1996,GB 5130,API 5L,DIN EN 10217 ...