[Ten years of development of chemical equipment] 1035-2023 Large LNG storage tank top safety valve passed the appraisal

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Chemical technology has developed greatly in the past ten years, praising the prosperity of China in the prosperous world. The sea is more lively and exciting with everyone's participation. Everyone is welcome to participate in more forum exchanges and discussions. July fires, pay attention to fire prevention------------------------------------------------- On March 16-17, 2023, the China General Machinery Industry Association organized a conference in Hangzhou between Ouchuange Valve Co., Ltd., China Huanqiu Engineering Co., Ltd. Beijing Branch and Zhejiang Engineering Co., Ltd.* * The prototype appraisal meeting of the "large LNG storage tank top safety valve (pilot safety valve + vacuum safety valve)" jointly developed by Nengliuheng Liquefied Natural Gas Co., Ltd. The expert committee stated that the main performance indicators of the prototype have reached the international advanced level of similar products, among which the set pressure deviation, sealing performance, full-open displacement, and reseating performance are among the internationally leading levels. 　　The participating experts listened to the development summary report and reviewed relevant technical documents. Some experts inspected the production and testing sites and witnessed the physical products and performance tests. The expert group believes that the prototype has four innovations:: First, the composite sealing structure design of the main valve disc of the pilot safety valve improves the sealing reliability. ； Second, the upper and lower polymer material film guide valve structures and an external air guide structure with small strain volume and efficient exhaust are used to improve the reliability of the valve action. ； Third, the vacuum safety valve has a double sealing structure of foam rubber gasket and O-ring to prevent overload of the composite sealing surface and improve the sealing performance under positive pressure. ； Fourth, the research and development unit built the first fully automatic operation special test device in China, realizing full performance testing of pilot safety valves and vacuum safety valves. 　　Sui Yongbin, former chief engineer of China Machinery Industry Federation, serves as the leader of the expert group of the appraisal committee. The expert group consists of experts from Hefei General Research Institute and * * Pipeline Beihai LNG Company, Nuclear and Radiation Safety Center of the Ministry of Ecology and Environment, Qingdao Liquefied Natural Gas Company, * * Pipeline Group Shenzhen LNG Company, Sinopec Guangzhou Company, China Tianchen Company, Hefei University of Technology, * * It is composed of experts from Pipeline Group Dalian LNG Company, Sinopec Tianjin LNG Company and other units.