46 C.F.R. § 61.30-1 Scope.
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The term thermal fluid heater as used in this part includes any fired automatic auxiliary heating unit which uses a natural or synthetic fluid in the liquid phase as the heat exchange medium and whose operating temperature and pressure do not exceed 204 °C (400 °F) and 225 psig, respectively. Thermal fluid heaters having operating temperatures and pressures higher than 204 °C (400 °F) and 225 psig, respectively, are inspected under subpart 61.05—Tests and Inspections of Boilers.
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PART 61—PERIODIC TESTS AND INSPECTIONS
Subpart 61.30—Tests and Inspections of Fired Thermal Fluid Heaters
§ 61.30-1 Scope.
