... pipes Standard:ASTM,AISI,EN,DIN,BS 2.alloy steel pipes O.D:1/2"-100" 3.alloy steel pipes W. ... Specifications1) P9 P5 P11 P22 P12 P91 T91 T12 2) O.D:1/2"-48" 3) W.T:SCH10-XXS 4) ... .Standard: ASTM A312,ASTM A213,ASTM A269,ASTM A790... 2.Material: TP304,TP304L,TP316,TP316L,TP317,TP317L,309S,310S,TP321 ... . .. chrome moly alloy steel pipes for power generation industry and the petro-chemical industry JIANGSU