... ,ISO,CE,etc BG API carbon steel round head pipe TypeApplicationStandardMaterialalloy steel pipeit is used in petroleum ... Chemical, chemical fiber, pharmaceutical machinery, etcASTM A213ASTM A312304304L316316L321steel pipe forlow temperatureApply to-45 °C ~ 195 °C ... are seamless steel tubeASTM A106ASTM A53A53 BA106 Bsteel pipe forstructureUsed in general structure,engineering scaffolds, mechanicalASTM ...