NFPA - National Fire Proection Association
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| NFPA 54 |
| National Fuel Gas Code |
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NFPA 54 - National Fuel Gas Code
Scope
This code is a safety code that shall apply to the installation of fuel gas piping systems, fuel gas utilization equipment, and related accessories as shown in 1.1.1.1( A) through 1.1.1.1( D).
(A) Coverage of piping systems shall extend from the point of delivery to the connections with each gas utilization device. For other than undiluted liquefied petroleum gas systems, the point of delivery shall be considered the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted liquefied petroleum gas systems, the point of delivery shall be considered the outlet of the final pressure regulator, exclusive of line gas regulators, in the system.
(B) The maximum operating pressure shall be 125 psi (862 kPa).
- Exception No. 1: Piping systems forg1Ls-h mixtures within the flammable range are limited to a maximum pressure of 10 psi (69 kPa).
- Exception No. 2: LP-Gm piping systems are limited to 2Opsi (1 40 Wa), except as provided in 5.5.2.
(C) Piping systems requirements shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance.
(D) Requirements for gas utilization equipment and related accessories shall include installation, combustion, and ventilation air and venting.
This code shall not apply to the following items (reference standards for some of which appear in Annex L) :
- Portable LP-Gas equipment of all types that are not con-
- Installation of farm equipment such as brooders, dehydrators, dryers, and irrigation equipment to special atmosphere generators
- Raw material (feedstock) applications except for piping
- Oxygen-fuel gas cutting and welding systems
- Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen
- Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants
- Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions
- LP-Gas installations at utility gas plants
- Liquefied natural gas (LNG) installations
- Fuel gas piping in power and atomic energy plants
- Proprietary items of equipment, apparatus, or instruments such as gas generating sets, compressors, and calorimeters
- LP-Gas equipment for vaporization, gas mixing, and gas Manufacturing
- LP-Gas piping for buildings under construction or renovations that is not to become part of the permanent building piping system - that is, temporary fixed piping for building heat
- Installation of LP-Gas systems for railroad switch heating
- Installation of LP-Gas and compressed natural gas systems on vehicles
- Gas piping, meters, gas pressure regulators, and other appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas
- Building design and construction, except as specified herein
- Fuel gas systems on recreational vehicles manufactured in accordance with NFPA 1192, Standard on Recreational Vehicles
- Fuel gas systems using hydrogen as a fuel