... 4 CUSTOMIZED OR DESIGN SERVICES Providing various chemical industrial & pressure vessels, columns, reactors, towers, heat exchangers, condensers, ... stainless steel.The pressure vessels, columns, reactors, towers, heat exchangers, condensers, storage tanks are widely used for petrochemical ... 1.Grade D of Designing and Manufacturing License of Pressure Vessel P.R. of China;2.ASME Certificate with ...