Seamless Alloy-Steel Pipe 34CrMo4 standard:astm a335 grade:P1, P2, P5, P9, P11, P12, P21, P22, P91, P92 Seamless Alloy-Steel Pipe 34CrMo4Standard: ASTM A335Steel Gr.: P1, P2, P5, P9, P11, P12, P21, P22, P91, P92Usage: High temperature service 1/ Product name ASTM A335 alloy steel pipe2/ Standard ASTM SA213, SA335, A369, A209, A250, G3462, G3467, DIN17175, BS3059-2 3/ Material A213: T2, T5, T9, ...