PD ISO/TR 5255-2:2023
BS EN ISO 23555-3 燃气压力安全和控制装置 用于入口压力高达 10 MPa 的燃气输送、分配和安装 第 3 部分:安全关闭装置
BS EN ISO 23555-3. Gas pressure safety and control devices for use in gas transmission, distribution and installations for inlet pressures up to and including 10 MPa. Part 3. Safety shut-off devices