... .Grade III of Designing and Manufacturing License of Pressure Vessel P.R. of China; 2.Manufacturing License of Nuclear ... , Incoloy, Hastelloy, etc.), stainless steel ( duplex stainless, UNS31803, SAF2205, SAF2507, etc. ), high stainless ( UNS31254, 317L, 904L, etc. ), common stainless ( 304, 304L, 316, ... as per the drawings of the clients. Pressured Vessel, Boiler Pressure Component & Heat Exchanger