Regulation .10 Heating Boiler — Existing Installation: Maximum Allowable Working Pressure
Regulation .10 Heating Boiler — Existing Installation: Maximum Allowable Working PressureLinkCopy Citation
A.
The maximum allowable working pressure on a standard boiler may not exceed the pressure stamped or cast by the manufacturer on:
(1)
The boiler; or
(2)
A plate secured to the boiler.
B.
The maximum allowable working pressure on:
(1)
The shell of a nonstandard riveted heating boiler shall be determined in accordance with Regulation .22 of this chapter, except that the maximum allowable working pressure on a:
(a)
Steam heating boiler may not exceed 15 PSIG; and
(b)
Hot water boiler may not exceed:
(i)
160 PSIG, or
(ii)
250°F.
(2)
A nonstandard steel or wrought iron heating boiler of welded construction:
(a)
May not exceed 15 PSIG for steam; and
(b)
For service other than steam, shall be calculated in accordance with the ASME Code, Section IV.
(3)
A nonstandard boiler composed principally of cast iron, or having a cast iron shell or heads and steel or wrought iron tubes, may not exceed:
(a)
15 PSIG for steam service; and
(b)
30 PSIG for hot water service.