... resistanceASTM SA335 A335,P22, P9,egStainless steeloil, aviation, metallurgy, food, water conservancy, electric power, chemical industry,Chemical, , pharmaceutical machinery, etc ... pipeoil and natural gas industry, the oxygen in the water, the oil pipeAPI 5LA,B,X42,X46, X52,X56 ... pipelow voltage liquid transportation with steel pipesSY/T5037-2000Q235BQ345B Large Diameter Stainless steel ASTM A213 Pipe