... :WPB GR.B TypeApplicationStandardMaterialalloy steel pipeit is used in petroleum,chemical,electric power,boiler etc ... low temperature resistance,Corrosion resistanceASTM SA335 A335P22A335P5A335P9A335P91stainless steel pipe Applies to oil, aviation, metallurgy, food, ... , chemical fiber, pharmaceutical machinery, etcASTM A213ASTM A312304304L316316L321steel pipe forlow temperatureApply to-45 °C ~ 195 °C ...