Ferritic & Austenitic Alloy Stainless Steel Pipe Standard: ASTM/ASME A213 Steel Grade: T11, T12, T22, T91, TP304, TP304L, Ferritic & Austenitic Alloy Stainless Steel PipeStandard: ASTM/ASME A213Steel Grade: T11, T12 ... , T22, T91, TP304, TP304L, TP316, TP316L, TP347Outside ...