Suzhou Oxygen Plant Co., LTD.(SOPC), founded in 1971 located in Suzhou suburb of Jiangsu province, is a professional enterprise for designing and manufacturing gas separation and liquefaction equipments. We have been entitled national middle-scale and Jiangsu, famous brand of Jiangsu, AAA level credit enterprise. Now we have 380 staff, of which 80 persons are professional engineers. Our total asset is over RMB100, 000, 000 and we achieved RMB180, 000, 000 turnovers in 2006. We have been devoted to construction and perfecting of quality control system. Now we have established ISO9001¼š2000 quality assurance system, … , …¡, …¢ category pressure vessels quality system, ASME quality system respectively. And we have realized total quality control and management before and after fabrication. We adopt CAD in designing and CAM in manufacturing. Especially for Turbine expander (key part of air separation plant): After over 20 years€™ research, we have achieved two national patents of high-rigid static thrust bearing and natural gas lubricant bearing. Besides, we have also won prizes such as Science and Technology Invention & Innovation Star awarded by Technological Information Promotion System of United Nations, Silver Prize of PITTCON Expo in USA, 3rd Prize of National Science & Technology Progress, Gold Dragon Prize for Excellent New Product awarded by China Economic Committee, etc. We have been qualified to manufacture air separation plants below 15000NM3/h, high purity nitrogen plants below 15000 NM3/h, liquid oxygen and nitrogen plant below 250T/D, cryogenic liquid(O2, N2, Ar, CO2¼Œliquid natural gas)tanks below 2000M3, cryogenic liquid transportation tanker below 50 M3, tank containers 10½ž40 feet, natural gas liquefier below 500000Nm3/d, etc. Besides, we have also involved spot gas supplying business. Our products have been widely used in metallurgy, petrochemical, mechanical, electronic, construction material, magnetic materials, textile, heat treatment, food, etc.