(a) Each automatically fired steam power boiler shall have at least one steam pressure control device that will shut off the fuel supply to each boiler when the steam pressure reaches a preset maximum operating pressure.

(b) In addition to the pressure control required in subdivision (a) of this section, each automatically fired steam power boiler installed after the effective date of this Subpart shall have a high limit manual reset steam pressure control that will prevent generation of steam pressure in excess of the maximum allowable working pressure.

(c) The flame safeguard requirements for high pressure boilers should be the same as they are for low pressure boilers (see Code Rule 4, Subparts 4-9, 4-10, 4-11 and 4-12 of this Part).