... resistanceASTM SA335 A335,P22, P9,egStainless steeloil, aviation, metallurgy, food, water conservancy, electric power, chemical industry,Chemical, , pharmaceutical machinery, etc ASTM ... liquid transportation, etc GB/T13793-1992GB3091-2001Q235BQ345BSpiral steel pipelow voltage liquid transportation with steel pipesSY/T5037-2000Q235BQ345B Large Diameter Stainless steel ASTM A213 Pipe