Inner Mongolia Dongsheng (Erdos) is the world's largest coal to oil project base, but also the world at present the first direct coal liquefaction project, the project cost 30000000000 yuan, designed capacity of 6000 tons of coal feeding. However, coal oilprocess Licensor for pipe connection to clear the project using the only foreign onlyhigh-pressure self tight flange (grayloc). Because the domestic blank, this discourse is controlled in the hands of foreign suppliers, they say how how, you don't have a choice. But if the order of foreign products, not only long period, the service is not timely, and the use is not a one-time, if the device in operation to repair, or to change a, foreign suppliers from the news arrived at the repair site during this period of time,the device stops running, the loss will be very serious.

     At that time, the project manager Wan Guojie Shenhua coal oil company be filled with a thousand regrets: "if the domestic manufacturers which can develop the high pressure flange, is to help the Shenhua." At that time, many domestic manufacturers have never seen such a flange. In as pressing danger, someone told the Shenhua,Chengdu originated machinery limited company of science and technology is developing the flange. Wan Guojie very happy, immediately to the Chengduoriginated hung up the phone, fit in easily with, which appeared in the development process, mentioned above, of course, in this process, the Shenhua Group and the project contractor Sinopec Engineering Inc (SEI) gave great support and help. 

     After the successful development, Shenhua coal to oil project began to order, the firstthirty or forty sets only. Thanks to Xu Zhi's good service, often to the site installation and use, what the problem is solved in time, then, Shenhua will order more than 200 sets of.

The project manager of Shenhua coal oil company Wan Guojie told reporters: "in the world's first coal to oil the biggest unit, Chengdu originated in Xu Zhihe Hou Liangping's two senior engineer r & D 'pressure self tight flange' occupies an important seat. Shenhua should appreciate them, countries should thank them."