The maximum allowable working pressure on the shell of a nonstandard riveted heating boiler shall be determined in accordance with K.A.R. 49-51-3. The maximum working pressure of a steam heating boiler shall be 15 psig and the maximum working pressure or temperature of a hot water boiler shall be 160 psig or 250°F temperature.
Kan. Admin. Regs. § 49-52-2