NFPA 54-2021 国家燃气规范

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NFPA 54 NATIONAL FUEL GAS CODE
NFPA 54 国家燃气规范

1.1 Scope.

1.1.1 Applicability.

1.1.1.1 This code is a safety code that shall apply to the installation of fuel gas piping systems, appliances, 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 appliance connections. For other than undiluted liquefied petroleum gas (LP-Gas) systems, the point of delivery shall be considered to be 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 LP-Gas, the point of delivery shall be considered to be 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 for gas–air mixtures within the flammable range are limited to a maximum pressure of 10 psi (69 kPa). Exception No. 2 LP-Gas piping systems are limited to 20 psi (140 kPa), except as provided in 5.5.2. (C) Requirements for piping systems shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance. (D) Requirements for appliances, equipment, and related accessories shall include installation, combustion, and ventilation air and venting.