Rule 15-10-76-3.2.4 - Nonstandard Cast-Iron Boilers1. The maximum allowable working pressure of a nonstandard boiler composed principally of cast-iron shall not exceed 15 psig for steam service or 30 psig for hot-water service.2. The maximum allowable working pressure of a nonstandard boiler having cast-iron shell or heads and steel or wrought iron tubes shall not exceed 15 psig for steam service or 30 psig for hot-water service.15 Miss. Code. R. 10-76-3.2.4
Miss. Code Ann. § 45-23-9