... Alloy Steel Pipe for High Temperature Service as Boiler tube ASTM A335 / ASME SA335 / P1 Seamless Ferritic Alloy Steel Pipe for High Temperature Service ... as Boiler tube1)STD.:ASTM A335 2)Steel Grade.:P1,P2,P5,P9,P11,P12,P22,P91,P92 3)Application:High ... ,T5,T9,T11,T12,T22,T91,T92ASTM A335: P1,P2,P5,P9,P11,P12,P21,P22,P91,P92DIN17173: TTSt35N, TTSt35V, 26CrMo4, 11MnNi53 ...