... :SS,CS,Alloy 4.Type:ERW,LASW,eg 5.Certificate:API,ISO,CE,eg TypeApplicationSTANDARDMATERIALAlloy steelpetroleum, chemical industry, ... pressure boiler tubemanufacturing by high pressure boiler tube, the collection box, steam pipe, etcASTM SA106A106 GRBSMLS steel liquid servicetransmission ... A53A53 BLine pipeoil and natural gas industry, the oxygen in the water, the oil pipeAPI 5LA,B,X42,X46, X52 ...