Standard for Fluid Heaters
|Publication Date:||1 January 2021|
This standard covers fluid heaters and related equipment.
Within the scope of this standard, a fluid heater is considered to be any thermal fluid heater or process fluid heater with the following features:
(1) Fluid is flowing under pressure.
(2) Fluid is indirectly heated.
(3) Release of energy from combustion of a liquid, solid, or gaseous fuel or an electrical source occurs within the unit.
This standard does not apply to the following:
(1) Boilers (which are covered by NFPA 85 or ANSI/ASME CSD-1, Controls and Safety Devices for Automatically Fired Boilers)
(2) Class A, B, C, or D ovens and furnaces (which are covered by NFPA 86)
(3) Fired heaters in petroleum refineries and petrochemical facilities that are designed and installed in accordance with API STD 560, Fired Heaters for General Refinery Service; API RP 556, Instrumentation, Control, and Protective Systems for Gas Fired Heaters; and API RP 2001, Fire Protection in Refineries
(4) Fired heaters commonly called reformer furnaces or cracking furnaces in the petrochemical and chemical industries
(5) Units that heat air for occupiable space or comfort
(6) LP-Gas vaporizers designed and installed in accordance with NFPA 58
(7)* Coal-fired systems
(8) Listed equipment with a heating system(s) that supplies a total input not exceeding 150,000 Btu/hr (44 kW)
(9) Quiescent bath fire-tube heaters