标准摘要
[中文适用范围]： 建立了一系列适用于控制阀特定设计的阀座泄漏等级，并定义了测试程序。 [外文原描述]： Defines the methods of inspection, the pressure and leak tests and performance tasks for valves with pressure ratings up to PN 100 (Class 600).
英文名称Industrial-process control valves. Part 4: Inspection and routine testing