... , P11, P12, P21, P22, P91, P92 Seamless Alloy-Steel Pipe 34CrMo4Standard: ASTM A335Steel Gr.: P1, P2, P5, P9, P11 ... High temperature service 1/ Product name ASTM A335 alloy steel pipe2/ Standard ASTM SA213, SA335, A369, A209, A250 ... STBA20, STBA22, STBA23, STBA24, STBA25, STBA26 4/ Outside diameter: 141.3mm~720mm 5/ Wall Thickness: 25mm~100mm 6/ ... ARE YOUR BEST CHOICE Seamless Alloy-Steel Pipe 34CrMo4