(A) The maximum allowable working pressure for boilers and pressure vessels built in accordance with the applicable section of the "ASME Boiler and Pressure Vessel Code" as referenced in rule 4101:4-3-01 of the Administrative Code shall be as determined in the applicable approved referenced standard to which it is constructed and stamped. In no case shall the maximum allowable pressure exceed the pressure indicated by the manufacturer's identification stamped or cast upon the boiler or pressure vessel. Upon inspection of a boiler, if conditions are found which justify a reduction of the maximum allowable working pressure, the factor of safety shall be appropriately increased.
(B) The maximum allowable steam working pressure for cast iron boilers, except for hot water boilers, shall be fifteen psig.
Replaces: 4101:4-7-05, 4101:4-7-08, 4101:4-11-03