... different grades & sizes of stainless steel pipe Product NameExecutiveDimensionSteel Code / Steel GradeSeamless Austenitic Stainless Steel PipesASTM A312, A312MASME ... , TP321, TP321H, TP347, TP347HSeamless Austenitic Stainless Steel Tubing for General ServiceASTM A269ASME SA269OD: 6 ... , MT317, MT317L, MT321, MT321H, MT347Seamless Stainless Steel Tubes for Pressure PurposesEN 10216DIN 17456, 17458OD: 6 ...