... etc., which made of carbon & alloy steel, stainless steel. The pressure vessels, columns, reactors, towers, heat exchangers, condensers, storage tanks, refrigerated ... certificate: 1.Grade III of Designing and Manufacturing License of Pressure Vessel P.R. of China; 2.Manufacturing License of Nuclear ... only as per the drawings of the clients. Pressured Vessel, Boiler Pressure Component & Heat Exchanger