Sec.29-232-57. Pressure on old boilers

Latest version.

In no case shall the maximum working pressure of an old boiler be increased to a greater pressure than would be allowed for a new boiler of the same construction.
(a) Cast iron headers and mud drums: The maximum allowable working pressure on a water tube boiler, the tubes of which are secured to cast iron or malleable iron headers, or which have cast iron mud drums, shall not exceed one hundred sixty psig.
(b) Pressure on cast iron boilers. The maximum allowable working pressure for any cast iron boiler, except hot water boilers, shall be fifteen psig.

(Effective August 25, 1987)

                    
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