... :WPB GR.B TypeApplicationStandardMaterialalloy steel pipeit is used in petroleum,chemical,electric power,boiler etc as they Resistance to high temperature ... to oil, aviation, metallurgy, food, water conservancy,electric power, chemical industry,Chemical, chemical fiber, pharmaceutical machinery, etcASTM A213ASTM A312304304L316316L321steel pipe forlow temperatureApply to-45 ...