Mich. Admin. Code R. 408.4281 - Material of seats and disks of relief valves

Rule 281. Seats and disks of relief valves shall be of material suitable to resist corrosion. No materials liable to fail due to deterioration or vulcanization when subject to saturated steam temperature corresponding to capacity test pressure shall be used for any part.

Notes

Mich. Admin. Code R. 408.4281
1979 AC

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