1208.10 Pressure Limitation Requirements. Where

piping systems serving appliances designed to operate with a gas supply pressure of 14 inches water column (3.5 kPa) or less are required to be equipped with overpressure protection by Section 1208.9, each overpressure protection device shall be adjusted to limit the gas pressure to each connected appliance to 2 psi (14 kPa) or less upon a failure of the line pressure regulator. [NFPA 54:5.9.2.1]

(2) The vent shall be designed to prevent the entry of

water, insects, or other foreign materials that could cause a blockage. (3) The regulator vent shall terminate at least 3 feet (914

mm) from a source of ignition.

(3) The regulator vent shall terminate at least 3 feet (914

mm) from a source of ignition. (4) At locations where regulators might be submerged

during floods, a special antiflood-type breather vent

(4) At locations where regulators might be submerged

during floods, a special antiflood-type breather vent fitting shall be installed, or the vent line shall be extended above the height of the expected flood waters. (5) A regulator shall not be vented to the appliance flue

or exhaust system. [NFPA 54:5.8.5.1]

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(5) A regulator shall not be vented to the appliance flue

or exhaust system. [NFPA 54:5.8.5.1] 1208.8.5 Venting of Gas Appliance PressureRegulators. For venting of gas appliance pressure regulators see Section 507.21. [NFPA 54:5.8.5.2] 1208.8.6 Discharge of Vents. The discharge of vents shall be in accordance with the following requirements: (1) The discharge stacks, vents, or outlet parts of all

pressure-relieving and pressure-limiting devices

(2) The discharge stack or vent line shall be at least the

same size as the outlet of the pressure-relieving device. [NFPA 54:5.9.8.1 – 5.9.8.2] 1208.8.7 Bypass Piping. Valved and regulated bypasses shall be permitted to be placed around gas line pressure regulators where continuity of service is imperative. [NFPA 54:5.8.6] 1208.8.8 Identification. Line pressure regulators at multiple regulator installations shall be marked by a metal tag or other permanent means designating the

(1) The discharge stacks, vents, or outlet parts of all

pressure-relieving and pressure-limiting devices shall be located so that gas is safely discharged to the outdoors. Discharge stacks or vents shall be designed to prevent the entry of water, insects, or other foreign material that could cause a blockage. (2) The discharge stack or vent line shall be at least the

same size as the outlet of the pressure-relieving

(2) The gas pressure at the inlet of the line pressure reg ulator for which the relief valve is providing overpressure protection is not less than the regulator’s normal operating inlet pressure. [NFPA 54:5.9.2.5]