Zhangjiagang Powerking Co. Ltd. Is the core enterprise, with an integration of information technology, science research, mass manufacturing and market potential. It is established on the base of Canghai Pipe Fitting Factory which was set up in 1982 and was composed via enterprise reform in 1990. For decades the board of directors always persists in the notion that making well-known professional enterprise, pursuing high quality, satisfying the customers, developing staff self-value and taking social development as their priority. The company has accomplished the primitive accumulation of capital through share capital reformation for four times and increasing capital and stock. At present the company occupies130, 000 square meters with total asset 420 million yuan and annual outcome 800 million yuan. The company has the staff of 1500 including 136 technicians. The products have developed from plain carbon steel and alloy steel which was produced at the beginning of the company to the present high-grade steel heavy-caliber fittings used for four big pipelines P91, P92, the oil-transfer and gas-transfer X70, X80, the X100 in subcritical, supercritical power plant as well as the base of pipe fitting product series for petroleum refinery 347H, incone1800 and the titanium material, the zirconium material, the special steel fitting series. It becomes the biggest pipe fitting supplier for petroleum refinery, oil transmission and gas transmission.