1208.11 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

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218 2022 CALIFORNIA PLUMBING CODE

FUEL GAS PIPING

ing unless approved technical justification is provided to demonstrate that protection is unnecessary: (1) The piping shall be made of corrosion-resistant

material that is suitable for the environment in which it will be installed. (2) Pipe shall have a factory-applied, electrically

insulating coating. Fittings and joints between sections of coated pipe shall be coated in accordance with the coating manufacturer’s instructions. (3) The piping shall have a cathodic protection sys tem installed, and the system shall be maintained in accordance with Section 1210.1.3.3 or Section 1210.1.3.6. [NFPA 54:7.1.3.2] 1210.1.3.3 Cathodic Protection. Cathodic protection systems shall be monitored by testing and the results shall be documented. The test results shall demonstrate one of the following: (1) A pipe-to-soil voltage of - 0.85 volts or more

negative is produced, with reference to a saturated copper-copper sulfate half cell. (2) A pipe-to-soil voltage of - 0.78 volts or more

negative is produced, with reference to a saturated KCl calomel half cell. (3) A pipe-to-soil voltage of - 0.80 volts or more

negative is produced, with reference to a silversilver chloride half cell. (4) Compliance with a method described in Appen dix D of Title 49 of the code of Federal Regulations, Part 192. [NFPA 54:7.1.3.3] 1210.1.3.4 Sacrificial Anodes. Sacrificial anodes shall be tested in accordance with the following: (1) Upon installation of the cathodic protection sys tem, except where prohibited by climatic conditions, in which case the testing shall be performed not later than 180 days after the installation of the system. (2) 12 to 18 months after the initial test. (3) Upon successful verification testing in accor dance with Section 1210.1.3.4(1) and Section 1210.1.3.4(2), periodic follow-up testing shall be performed at intervals not to exceed 36 months. [NFPA 54:7.1.3.4] 1210.1.3.5 System Failing Tests. Systems failing a test shall be repaired not more than 180 days after the date of the failed testing. The testing schedule shall be restarted as required in Section 1210.1.3.4(1) and Section 1210.1.3.4(2), and the results shall comply with Section 1210.1.3.3. [NFPA 54:7.1.3.5]

1210.1.3.6 Impressed Current Cathodic Pro- tection. Impressed current cathodic protection systems shall be inspected and tested in accordance with the following schedule: (1) The impressed current rectifier voltage output

shall be checked at intervals not exceeding two months.

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sure at the meter. Such protective devices include, but are not limited to, mechanical, diaphragm-operated, or electrically operated low-pressure shutoff valves. [NFPA 54:5.11]