Section R20-5-416. Maximum Allowable Working Pressure

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A. The ASME Code under which a boiler was constructed and stamped shall determine the maximum allowable working pressure for the ASME-stamped boiler.

B. If components in the boiler or hot water system such as valves, pumps, expansion tanks, storage tanks or piping have a lesser working pressure rating than the boiler or hot water heater, the pressure setting for the safety or safety relief valve on the boiler or hot water heater shall be based upon the component with the lowest maximum allowable working pressure rating.

Historical Note

Repealed effective April 12, 1979 (Supp. 79-2). New

Section adopted effective April 9, 1992 (Supp. 92-2). R20-5-416 recodified from R4-13-416 (Supp. 95-1). Amended effective October 9, 1998 (Supp. 98-4). Amended by final rulemaking at 15 A.A.R. 1496, effec- tive August 18, 2009 (Supp. 09-3).

                    
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