... seamless steel tube: Material: 12Cr1MoV, P22(10CrMo910), T91, P91, P9, T9, WB36, Cr5Mo(P5STFA25T5), 15CrMo(P11P12STFA22), 13CrMo44, Cr5Mo, 15CrMo, 25CrMo, 30CrMo, 40CrMo, and ... Official API Monogram.2> Boiler and Super-heater Pipes,Seamless Pressure Pipes had been approved by CCS ... policy as" Quality for Servial, Product for Development, Credibility for Cooperation and Service for Customer.We are ...