... P9, P11, P12, P21, P22, P91, P92 Seamless Alloy-Steel Pipe 34CrMo4Standard: ASTM A335Steel Gr.: P1, P2, P5, P9, ... P92Usage: High temperature service 1/ Product name ASTM A335 alloy steel pipe2/ Standard ASTM SA213, SA335, A369, A209, ... , 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