Material carbon steel 16MnR stainless steel 304L 316 The reaction kettle use in mixing or stirring of liquid or solid , fermenting . Hongqi manufacture unit of D1 and D2 Pressure vessel,which has been approved by State Bureau of Quality and Technical Supervision. It is one of the largest manufacturer of D1and D2Pressure vessel (gas storge tank and Non-standard pressure vessel )at home. In addition,Hongqi pressure vessel can design and manufacture other various D1 and D2 pressure vessels according to users requirements. We believe in great service everytime all the time