... T/T L/C Cangzhou Qiancheng Steel-Pipe Co.,Ltd.NORMAL PRODUCTS CARBON STEEL PIPEASTM/ASMESEAMLESSA/SA53 GR.BA ... C60, C65 etc..A134-A283, A134-A285 etc..APIWELDEDAPI 5L-B, X42, X52, X56, X60, X65JISWELDEDSTPG370, STPY400, STK400, ... chemical industry, electric power, metallurgy thermodynamic fields, water supply engineering, steam heating, hydroelectric power station and long pipeline transportation ...