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// CODE SNIPPET

416.2 Pressure Limitation Requirements

2017 FBC - Fuel Gas, 6th edition > 4 Gas Piping Installations > 416 (IFGS) Overpressure Protection Devices > 416.2 Pressure Limitation Requirements
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The requirements for pressure limitation shall be in accordance with Sections 416.2.1 through 416.2.5.

416.2.1 Pressure Under 14 Inches W.C

Where piping systems serving appliances designed to operate with a gas supply pressure of 14 inches w.c. or less are required to be equipped with overpressure protection by Section 416.1, each overpressure protection device shall be adjusted to limit the gas pressure to each connected appliance to 2 psi or less upon a failure of the line pressure regulator.

416.2.2 Pressure Over 14 Inches W.C

Where piping systems serving appliances designed to operate with a gas supply pressure greater than 14 inches w.c. are required to be equipped with overpressure protection by Section 416.1, each overpressure protection device shall be adjusted to limit the gas pressure to each connected appliance as required by the appliance manufacturer's installation instructions.

416.2.3 Device Capability

Each overpressure protection device installed to meet the requirements of this section shall be capable of limiting the pressure to its connected appliance(s) as required by this Section 416.2.1, independently of any other pressure control equipment in the piping system.

416.2.4 Failure Detection

Each gas piping system for which an overpressure protection device is required by Section 416 shall be designed and installed so that a failure of the primary pressure control device(s) is detectable.

416.2.5 Relief Valve

Where a pressure relief valve is used to meet the requirements of Section 416, it shall have a flow capacity such that the pressure in the protected system is maintained at or below the limits specified in Section 416.2.1 under all of the following conditions:

  1. The line pressure regulator for which the relief valve is providing overpressure protection has failed wide open.
  2. The gas pressure at the inlet of the line pressure regulator for which the relief valve is providing overpressure protection is not less than the regulator's normal operating inlet pressure.

Related Code Sections


416.2 Gas Piping Installations, Pressure Limitation Requirements
The requirements for pressure limitation shall be in accordance with Sections 416.2.1 through 416.2.5 ...
2017 FBC - Fuel Gas, 6th edition > 4 Gas Piping Installations > 416 (IFGS) Overpressure Protection Devices > 416.2 Pressure Limitation Requirements
416.2 Gas Piping Installations, Pressure Limitation Requirements
The requirements for pressure limitation shall be in accordance with Sections 416.2.1 through 416.2.5 ...
2020 FBC - Fuel Gas, 7th edition > 4 Gas Piping Installations > 416 (IFGS) Overpressure Protection Devices > 416.2 Pressure Limitation Requirements
416.2.2 Gas Piping Installations, Pressure Over 14 Inches W.C
Where piping systems serving appliances designed to operate with a gas supply pressure greater than 14 inches w.c. are required to be equipped ...
2020 FBC - Fuel Gas, 7th edition > 4 Gas Piping Installations > 416 (IFGS) Overpressure Protection Devices > 416.2 Pressure Limitation Requirements > 416.2.2 Pressure Over 14 Inches W.C
416.2.1 Gas Piping Installations, Pressure Under 14 Inches W.C
Where piping systems serving appliances designed to operate with a gas supply pressure of 14 inches w.c. or less are required to be equipped ...
2017 FBC - Fuel Gas, 6th edition > 4 Gas Piping Installations > 416 (IFGS) Overpressure Protection Devices > 416.2 Pressure Limitation Requirements > 416.2.1 Pressure Under 14 Inches W.C
416.2.1 Gas Piping Installations, Pressure Under 14 Inches W.C
Where piping systems serving appliances designed to operate with a gas supply pressure of 14 inches w.c. or less are required to be equipped ...
2020 FBC - Fuel Gas, 7th edition > 4 Gas Piping Installations > 416 (IFGS) Overpressure Protection Devices > 416.2 Pressure Limitation Requirements > 416.2.1 Pressure Under 14 Inches W.C
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