NS EN 331 Ed. 1 标准详情
- 标准号:NS EN 331 Ed. 1
- 中文标题:
- 英文标题:Manually Operated Ball Valves And Closed Bottom Taper Plug Valves For Gas Installations For Buildings
- 标准类别:挪威标准NS
- 发布日期:
Defines the general requirements for the construction, performance and safety of ball valves and closed bottom taper plug valves. In addition, it details the test procedures and marking requirements. It is applicable to valves for domestic and commer
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