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ASMES A335 P9 Boiler Tube for Petrochemical Industry. Yuhong Group is one of the earliest group to export Chrome Moly Pipe in China, Till now around 20 years experience for Alloy Steel Pipe and tube, which according to : ASME SA335 / ASTM A335 P1, P11, P12, P22, P5, P9, P91, P92 ; ASME SA213 /ASTM A213 T1, T11, T12, T22, T5, T9, T91, T92 . And our alloy steel pipe and tube was width used in petrochemical , oil refinery , power plant , .... A335/SA335 P9 is a seamless ferritic