Mich. Admin. Code R. 408.4220 - Safety valves on connected boilers of different pressures

Rule 220. When 2 or more boilers operating at different pressures and safety valve settings are interconnected, the lower pressure boilers or interconnected piping shall be equipped with safety valves of sufficient capacity to prevent overpressure, considering the maximum amount of steam that can flow into the lower pressure system.


Mich. Admin. Code R. 408.4220
1979 AC

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