13 NCAC 13 .0423             MODEL HOBBY BOILERS

Model hobby boilers shall meet the following requirements:

(1)           Each boiler shall have:

(a)           an operating pressure gauge that shall not be less than 1 ½ times nor more than four times the operating pressure of the boiler;

(b)           two safety relief valves each of which shall be capable of protecting the boiler from over pressurization. Requirements for ASME/NB certification are waived. If an ASME/NB safety relief valve is utilized, only one safety relief valve is required;

(c)           an accessible mud-ring valve;

(d)           a water gauge glass; and

(e)           if constructed of copper, a fusible plug in the top of the crown sheet.

(2)           Upon completion of the inspection and payment of the applicable fees referenced in this Chapter, the Chief Inspector shall issue a Certificate of Inspection valid for one year.

History Note:        Authority G.S. 95‑69.11; 95‑69.14;

Eff. July 1, 2006;

Pursuant to G.S. 150B-21.3A, rule is necessary without substantive public interest Eff. July 22, 2018;

Amended April 1, 2022.