... ,JISB,GOST,etc 4)material:mild steel 5)API,ISO,CE,etc BG API carbon steel round head pipe TypeApplicationStandardMaterialalloy steel pipeit ... , food, water conservancy,electric power, chemical industry,Chemical, chemical fiber, pharmaceutical machinery, etcASTM A213ASTM A312304304L316316L321steel pipe forlow temperatureApply to-45 °C ...