... ,JISB,GOST,etc 4)material:mild steel 5)API,ISO,CE,etc BG welded carbon steel pipe TypeApplicationStandardMaterialalloy steel pipeit is used in petroleum,chemical ... collection box, steam pipe, etcASTM SA106A106 GRBsteel pipe forfluidApplicable to transmission fluidwhich are seamless steel tubeASTM A106ASTM A53A53 BA106 Bsteel pipe forstructureUsed in general ...