See if this helps - This is the info NBIC has posted for S.C.
Adrienne Youmans, Director
Ronald Galloway, Administrator
Department of Labor, Licensing and Regulation
Boiler Safety Program
Kingstree Building
P.O. Box 11329
Columbia, SC 29211-1329
Telephone -- 803.896.4634
Don't take my word for it, but it appears that S.C. only governs boilers, and I didn't see any mention about repairs. This, of course, is info from the document mentioned above.