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2021 ORSC Draft 2018 IRC – Purple Rescinded ORSC amendment – Green 2017 ORSC added language – Blue/underline New ORSC added language – BrightBlue/underline 2017 ORSC deleted language – Red/strikethrough New ORSC deleted language – Bright Red/strikethrough Part VI—Fuel Gas CHAPTER 24 FUEL GAS The text of this chapter is extracted from the 2018 edition of the International Fuel Gas Code and has been modified where necessary to conform to the scope of application of the International Residential Code. SECTION G2401 (101) G2401.2.2 Temporary gas service. Temporary fuel gas GENERAL service shall be permitted upon approval of the municipality. G2401.1 (101.2) Application. This chapter covers those fuel gas piping systems, fuel-gas appliances and related accessories, SECTION G2402 (201) venting systems and combustion air configurations most GENERAL commonly encountered in the construction of one- and two- family dwellings and structures regulated by this code. G2402.1 (201.1) Scope. Unless otherwise expressly stated, the following words and terms shall, for the purposes of this Coverage of piping systems shall extend from the point of chapter, have the meanings indicated in this chapter. delivery to the outlet of the appliance shutoff valves (see ONLY definition of “Point of delivery”). Piping systems requirements G2402.2 (201.2) Interchangeability. Words used in the shall include design, materials, components, fabrication, present tense include the future; words in the masculine gender assembly, installation, testing, and inspection, operation and include the feminine and neuter; the singular number includes maintenance. Requirements for gas appliances and related the plural and the plural, the singular. accessories shall include installation, combustion and G2402.3 (201.3) Terms defined in other codes. Where terms ventilation air and venting and connections to piping systems. are not defined in this code and are defined in the International The omission from this chapter of any material or method of Electrical Code, Building Code, International Fire Code, installation provided for in the International Fuel Gas International Mechanical Code, International Fuel Gas Code Mechanical Code shall not be construed as prohibiting the use or International or Plumbing Code, such terms shall have of such material or method of installation. Fuel-gas piping meaningsUSE ascribed to them as in those codes. systems, fuel-gas appliances and related accessories, venting systems and combustion air configurations not specifically covered in these chapters shall comply with the applicable SECTION G2403 (202) provisions of the International Fuel Gas Mechanical Code. GENERAL DEFINITIONS Gaseous hydrogen systems shall be regulated by Chapter 7 ACCESS (TO). That which enables a device, appliance or Appendix C of the International Fuel Gas Mechanical Code. equipment to be reached by ready access or by a means that first requires the removal or movement of a panel, door or similar This chapter shall not apply to the following: obstruction (see also “Ready access”). 1. Liquefied natural gas (LNG) installations. 2. Temporary LP fuel-gas piping for buildings under AIR CONDITIONER, GAS-FIRED. A gas-burning, construction or renovation that is not to become part automatically operated appliance for supplying cooled air, of the permanent piping system. dehumidified air, or both, or chilled liquid. 3. Except as provided in Section G2412.1.1, gas piping, AIR CONDITIONING. The treatment of air so as to control meters, gas pressure regulators, and other simultaneously the temperature, humidity, cleanness and distribution appurtenances used by the serving gas supplier in the of the air to meet the requirements of a conditioned space. distribution of gas, other than undiluted LP-gas. AIR, EXHAUST. Air being removed from any space or piece 4. Portable LP fuel-gas appliances and equipment of all of equipment or appliance and conveyed directly to the types that is not connected to a fixed fuel piping atmosphere by means of openings or ducts. system. AIR-HANDLING UNIT. A blower or fan used for the 5. Portable fuel cell appliances that are neither connected to purpose of distributing supply air to a room, space or area. a fixed piping system nor interconnected to a power grid. 6. Installation of hydrogen gas, LP-gas and compressed AIR, MAKEUP. Any combination of outdoor and transfer air natural gas (CNG) systems on vehicles. intended to replace exhaust air and exfiltration. G2401.2 Authority to render gas service. ALTERATION. A change in a system that involves an extension, addition or change to the arrangement, type or G2401.2.1 Turn on authority. A serving gas supplier or purpose of the original installation. COMMITTEEperson furnishing gas shall not turn on, or cause to be turned on, fuel gas or gas meters until the approval of the rough ANODELESS RISER. A transition assembly in which plastic piping inspection is in compliance with Section G2417.1.1.1. piping is installed and terminated above ground outside of a building. APPLIANCE. Any apparatus or device that utilizes a BONDING JUMPER. A conductor installed to electrically fuel or a raw material as a fuel to produce light, heat, connect metallic gas piping to the grounding electrode system. power, refrigeration or air conditioning. Also, an BRAZING. A metal-joining process wherein coalescence is apparatus that compresses fuel gases. produced by the use of a nonferrous filler metal having a APPLIANCE, AUTOMATICALLY CONTROLLED. melting point above 1,000ºF (538ºC), but lower than that of the Appliances equipped with an automatic burner ignition and base metal being joined. The filler material is distributed safety shutoff device and other automatic devices, that between the closely fitted surfaces of the joint by capillary accomplish complete turn-on and shutoff of the gas to the main action. burner or burners, and graduate the gas supply to the burner or BTU. Abbreviation for British thermal unit, which is the burners, but do not affect complete shutoff of the gas. quantity of heat required to raise the temperature of 1 pound APPLIANCE, FAN-ASSISTED COMBUSTION. An (454 g) of water 1ºF (0.56ºC) (1 Btu = 1055 J). appliance equipped with an integral mechanical means to either BURNER. A device for the final conveyance of the gas, or a draw or force products of combustion through the combustion mixture of gas and air, to the combustion zone. chamber or heat exchanger. Induced-draft. A burner that depends on draft induced by a APPLIANCE, UNVENTED. An appliance designed or fan that is an integral part of the appliance and is located installed in such a manner that the products of combustion are downstream from the burner. not conveyed by a vent or chimney directly to the outside Power. A burner in which gas, air or both are supplied at atmosphere. pressures exceeding, for gas, the line pressure, and for air, atmospheric pressure, with this addedONLY pressure being applied APPLIANCE, VENTED. An appliance designed and installed at the burner. in such a manner that all of the products of combustion are conveyed directly from the appliance to the outside atmosphere CHIMNEY. A primarily vertical structure containing one or through an approved chimney or vent system. more flues, for the purpose of carrying gaseous products of combustion and air from an appliance to the outside APPROVED. Acceptable to the code official. atmosphere. APPROVED AGENCY. An established and recognized Factory-built chimney. A listed and labeled chimney agency that is regularly engaged in conducting tests, furnishing composed of factory-made components, assembled in the inspection services or furnishing certification, where such field in accordance with manufacturer’s instructions and the agency has been approved by the code official. conditionsUSE of the listing. ATMOSPHERIC PRESSURE. The pressure of the weight of Masonry chimney. A field-constructed chimney composed air and water vapor on the surface of the earth, approximately of solid masonry units, bricks, stones or concrete. 14.7 pounds per square inch (psia) (101 kPa absolute) at sea CLEARANCE. The minimum distance through air measured level. between the heat-producing surface of the mechanical AUTOMATIC IGNITION. Ignition of gas at the burner(s) appliance, device or equipment and the surface of the when the gas controlling device is turned on, including combustible material or assembly. reignition if the flames on the burner(s) have been extinguished CLOTHES DRYER. An appliance used to dry wet laundry by by means other than by the closing of the gas controlling device. means of heated air. BAROMETRIC DRAFT REGULATOR. A balanced damper Type 1. Factory-built package, multiple production. device attached to a chimney, vent connector, breeching or flue gas Primarily used in the family living environment. Usually the manifold to protect combustion appliances by controlling chimney smallest unit physically and in function output. draft. A double-acting barometric draft regulator is one whose CODE. These regulations, subsequent amendments thereto, or balancing damper is free to move in either direction to protect any emergency rule or regulation that the administrative combustion appliances from both excessive draft and backdraft. authority having jurisdiction has lawfully adopted. BOILER, LOW-PRESSURE. A self-contained appliance for CODE OFFICIAL. The officer or other designated authority supplying steam or hot water. charged with the administration and enforcement of this code, Hot water heating boiler. A boiler in which no steam is generated, or a duly authorized representative. from which hot water is circulated for heating purposes and then returned to the boiler, and that operates at water pressures not COMBUSTIBLE ASSEMBLY. Wall, floor, ceiling or other exceeding 160 pounds per square inch gauge (psig) (1100 kPa assembly constructed of one or more component materials that gauge) and at water temperatures not exceeding 250ºF (121ºC) at or are not defined as noncombustible. near the boiler outlet. COMBUSTIBLE MATERIAL. Any material not defined as Hot water supply boiler. A boiler, completely filled with water, noncombustible.
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