ANSI Z21.22a Addenda-1990 标准详情
- 标准号:ANSI Z21.22a Addenda-1990
- 中文标题:热水供给系统的安全阀和气体自动关闭装置.补充件
- 英文标题:Relief valves and automatic gas shutoff devices for hot water supply systems; Addenda
- 标准类别:美国国家标准
- 发布日期:1990
Details test and examination criteria for: 1.Temperature relief valves and combination temperature and pressure relief valves for use on storage tanks of hot water supply systems without heater input limitation; 2.Valves having only pressure relief f
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