675 IAC 30-4-51 "Waste heat boiler" defined

Sec. 51. (a) "Waste heat boiler" means a closed vessel that is intended to be operated under pressure for the purpose of heating water or generating steam for external use by the application of heat. (b) The configuration of the unit shall govern the sections of this article applicable to its design, construction, fabrication, and inspection as follows: (1) If the unit contains tubes, drums, and accessories commonly associated with boilers, the sections applicable to power boilers shall apply. (2) If the unit contains a shell, tube bundle, and channel commonly associated with heat exchangers, the sections applicable to unfired pressure vessels shall apply.