Page 25 - 2018_IFGC

DEFINITIONS

AUTOMATIC IGNITION. Ignition of gas at the burner(s) [M] CHIMNEY. A primarily vertical structure containing
when the gas controlling device is turned on, including reig- one or more flues, for the purpose of carrying gaseous prod-
nition if the flames on the burner(s) have been extinguished ucts of combustion and air from an appliance to the outside
by means other than by the closing of the gas controlling atmosphere.
device.
Factory-built chimney. A listed and labeled chimney
BAFFLE. An object placed in an appliance to change the composed of factory-made components, assembled in the
direction of or retard the flow of air, air-gas mixtures or flue field in accordance with manufacturer’s instructions and
gases. the conditions of the listing.
BAROMETRIC DRAFT REGULATOR. A balanced Masonry chimney. A field-constructed chimney com-
damper device attached to a chimney, vent connector, breech- posed of solid masonry units, bricks, stones or concrete.
ing or flue gas manifold to protect combustion appliances by Metal chimney. A field-constructed chimney of metal.
controlling chimney draft. A double-acting barometric draft
regulator is one whose balancing damper is free to move in [M] CLEARANCE. The minimum distance through air
either direction to protect combustion appliances from both measured between the heat-producing surface of the mechan-
excessive draft and backdraft. ical appliance, device or equipment and the surface of the
combustible material or assembly.
BOILER, LOW-PRESSURE. A self-contained appliance
for supplying steam or hot water. CLOTHES DRYER. An appliance used to dry wet laundry
by means of heated air. Dryer classifications are as follows:
Hot water heating boiler. A boiler in which no steam is Type 1. Factory-built package, multiple production. Pri-
generated, from which hot water is circulated for heating marily used in family living environment. Usually the
purposes and then returned to the boiler, and that operates smallest unit physically and in function output.
at water pressures not exceeding 160 pounds per square
inch gauge (psig) (1100 kPa gauge) and at water tempera- Type 2. Factory-built package, multiple production. Used
tures not exceeding 250°F (121°C) at or near the boiler in business with direct intercourse of the function with the
outlet. public. Not designed for use in individual family living
environment.
Hot water supply boiler. A boiler, completely filled with
water, which furnishes hot water to be used externally to [A] CODE. These regulations, subsequent amendments
itself, and that operates at water pressures not exceeding thereto or any emergency rule or regulation that the adminis-
160 psig (1100 kPa gauge) and at water temperatures not trative authority having jurisdiction has lawfully adopted.
exceeding 250°F (121°C) at or near the boiler outlet. [A] CODE OFFICIAL. The officer or other designated
Steam heating boiler. A boiler in which steam is gener- authority charged with the administration and enforcement of
ated and that operates at a steam pressure not exceeding 15 this code, or a duly authorized representative.
psig (100 kPa gauge). [M] COMBUSTIBLE ASSEMBLY. Wall, floor, ceiling or
other assembly constructed of one or more component mate-
BONDING JUMPER. A conductor installed to electrically
connect metallic gas piping to the grounding electrode sys- rials that are not defined as noncombustible.
tem. [M] COMBUSTIBLE MATERIAL. Any material not
defined as noncombustible.
[M] BRAZING. A metal-joining process wherein coales-
cence is produced by the use of a nonferrous filler metal hav- [M] COMBUSTION. In the context of this code, refers to
ing a melting point above 1,000°F (538°C), but lower than the rapid oxidation of fuel accompanied by the production of
that of the base metal being joined. The filler material is dis- heat or heat and light.
tributed between the closely fitted surfaces of the joint by [M] COMBUSTION AIR. Air necessary for complete com-
capillary action. bustion of a fuel, including theoretical air and excess air.
BROILER. A general term including salamanders, barbe- [M] COMBUSTION CHAMBER. The portion of an appli-
cues and other appliances cooking primarily by radiated heat, ance within which combustion occurs.
excepting toasters.
[M] COMBUSTION PRODUCTS. Constituents resulting
BTU. Abbreviation for British thermal unit, which is the from the combustion of a fuel with the oxygen of the air,
quantity of heat required to raise the temperature of 1 pound including inert gases, but excluding excess air.
(454 g) of water 1°F (0.56°C) (1 Btu = 1055 J).
[M] CONCEALED LOCATION. A location that cannot be
BURNER. A device for the final conveyance of the gas, or a accessed without damaging permanent parts of the building
mixture of gas and air, to the combustion zone. structure or finish surface. Spaces above, below or behind
readily removable panels or doors shall not be considered as
Induced-draft. A burner that depends on draft induced by
a fan that is an integral part of the appliance and is located concealed.
downstream from the burner. CONCEALED PIPING. Piping that is located in a con-
cealed location (see “Concealed location”).
Power. A burner in which gas, air or both are supplied at
pressures exceeding, for gas, the line pressure, and for air, CONDENSATE. The liquid that condenses from a gas
atmospheric pressure, with this added pressure being (including flue gas) caused by a reduction in temperature or
applied at the burner. increase in pressure.

12 2018 INTERNATIONAL FUEL GAS CODE ®
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