低温阀门关键性能国内外标准技术差异分析  

Analysis of Technical Differences between Domestic and Foreign Standards for Key Performance of Cryogenic Valves

作　　者：吴超俊 缪克在 胡志涛 方威 张帆 WU Chao-jun;MIAO Ke-zai;HU Zhi-tao;FANG Wei;ZHANG Fan(Zhejiang Inspection Center of Pump and Valve Product Quality;Suzhou SEARCHST Co.,Ltd.)

机构地区：[1]浙江省泵阀产品质量检验中心 [2]苏州西玛流体科技有限公司

出　　处：《中国标准化》2024年第9期176-182,共7页China Standardization

基　　金：温州市市场监督管理局科技计划项目“阀门泄漏检测气增压及氦气自动回收集成智控装置项目”(项目编号:2023020)资助。

摘　　要：为了研究低温阀门关键性能与结构,本文对比了GB/T 24925—2019、BS 6364-1984(R1998)、ISO 28921-1:2022、MSS SP-134-2012等国内外标准在适用范围、主要技术指标、测试方法的区别以及由此产生的影响。综述了低温阀门的应用工况、典型产品分类、典型壳体材料、典型结构特征以及国内外常用标准分类等,指出了低温阀门的温度范围、伸长颈部结构设计特征以及需进行低温性能试验的温度临界点等。阐述了国标GB/T 24925—2019规定的低温试验过程未区分硬密封与软密封阀座泄漏率以及阀座泄漏率测量的局限性,通过理论分析验证说明了阀座泄漏率准确测量与换算方法,为低温阀门性能提升以及国标的完善与修订提供技术指引。In order to study key performance a nd structure of cryogenic valves,t he paper compares t he d ifferences i n application scope,main technical indexes,test methods and influence of domestic and foreign standards such as GB/T 24925-2019,BS 6634-1984(R1998),ISO 28921-1:2022,and MSS SP-134-2012.The application conditions,typical product classification,typical valve shell materials,typical structure characteristics and common standards classification at home and abroad for cryogenic valves are summarized.The temperature range of cryogenic valves,the structural design features of extended neck and the temperature critical point for cryogenic performance test are pointed out.The low temperature test process stipulated in GB/T 24925-2019 does not distinguish between hard seals and soft seals in terms of the leakage rate of valve seats,and the measurement of leakage rate of valve seats,which is expounded as shortcomings.The paper explains the accurate measurement method and conversion method of valve seat leakage rate through theoretical analysis and verification,which provides technical guidance for the improvement of cryogenic valve performance as well as the development and revision of national standards.

关 键 词：低温阀门 关键性能 低温性能试验 阀座泄漏率 

分 类 号：TH134[机械工程—机械制造及自动化]