【Ten Years of Rapid Development in Chemical Equipment】Safety valves for large LNG storage tanks from 2015 to 2023 have passed certification

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Ten years of rapid development in chemical engineering technology; praise for the prosperous and strong China. This is just a starting point to encourage more participation from everyone. HaiChuan becomes even better with your involvement – we welcome all to join in the forum discussions. Be careful with fire risks as the heat increases in July. ---------------------------------------------- From March 16th to 17th, 2023, the China General Machinery Industry Association held in Hangzhou an evaluation meeting for the prototype of the “large-scale LNG storage tank top safety valve (pilot-operated safety valve + vacuum safety valve)”, which was developed jointly by Ouchuange Valve Co., Ltd., the Beijing branch of China Global Engineering Co., Ltd., and Zhejiang Energy Liuheng LNG Co., Ltd. The expert committee stated that the key performance indicators of this prototype reach an advanced level compared to similar international products, with parameters such as setting pressure deviation, sealing performance, full-open displacement, and return-to-seat performance being at the international leading level. 　　The experts present listened to the summary report on the development process, reviewed relevant technical documents, and some of them visited the production and testing sites to see the actual products and observe their performance tests. The expert group believes that there are 4 innovative features of this prototype: first, the composite sealing structure design for the valve disc of the pilot-operated safety valve improves the reliability of sealing ； Secondly, it adopts a pilot valve structure with upper and lower polymer film sheets, as well as an external gas guide structure featuring a small strain volume and efficient exhaust, thereby improving the reliability of the valve’s operation ； Thirdly, the vacuum safety valve features a dual-sealing structure consisting of a foam rubber gasket and an O-ring, which prevents overload on the composite sealing surface and improves the sealing performance under positive pressure ； Fourth, the development unit built the first set of fully automatic specialized testing equipment in China, enabling comprehensive performance testing of pilot-operated safety valves and vacuum safety valves. 　　Sui Yongbin, former chief engineer of the China National Machinery Industry Federation, served as the head of the expert panel for the evaluation. The panel was composed of experts from Hefei General Research Institute, **Pipeline Network Beihai LNG Company, the Nuclear and Radiation Safety Center of the Ministry of Ecology and Environment, Qingdao LNG Company, **Pipeline Network Group Shenzhen LNG Company, Sinopec Guangzhou Company, China Tianchen Corporation, Hefei University of Technology, **Pipeline Network Group Dalian LNG Company, and Sinopec Tianjin LNG Company.