As the Main Contractor & Main Designer, China National Air Separation Plant Corporation (CNASPC) is subordinated to the Ministry of Machinery industry of the People? s Republic of China for engineering technical design, forming complete set of plant and project contracting. CNASPC is the only national professional company of the air separation complete set of plant in China. CNASPC is one of the members of the China Machinery Equipment(Group) Corporation, which is the biggest group for machinery industry in China. The Corporation engages mainly in contracting engineering project for complete sets of air separation plant, PSA unit, dissolved acetylene plant and other various kinds of industrial gases plant. Through successfully development for over seventeen years, the corporation is now a trans-regional conglomeracy, consisting of 33 member units including all sorts of special manufactories for air separation plant, metallurgical and chemical design institutes, research institutes, equipment installation companies.