... GR6High pressure boiler tubemanufacturing by high pressure boiler tube, the collection box, steam pipe, etcASTM SA106A106 GRBSMLS steel liquid servicetransmission fluid ... industry, the oxygen in the water, the oil pipeAPI 5LA,B,X42,X46, X52,X56,X60,egStraighe seem steel pipegeneral structure ... voltage liquid transportation with steel pipesSY/T5037-2000Q235BQ345B A106 B ASTM A106 Seamless Steel Pipe