... to the People's Republic of China G13150-1998 "steel pressure vessel" standard design and manufacture, every procedure must be ... concentration of anticorrosion, flame retardant, dyeing, solution by vacuum high-pressure infuse wood inside the cells, thus plays anticorrosive, mould proof ... Annual production: 5,000 cubic meters ~ 20,000 cubic meters. hot sales still kettles manufacture in Xinxiang city