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TITLE 16ECONOMIC REGULATION
PART 1RAILROAD COMMISSION OF TEXAS
CHAPTER 14REGULATIONS FOR LIQUEFIED NATURAL GAS (LNG)
SUBCHAPTER DGENERAL RULES FOR LNG FUELING FACILITIES
RULE §14.2313Fuel Dispensing Systems

(a) Compliance with this section does not ensure conformity with other state and federal regulations, such as those of the Texas Commission on Environmental Quality or the United States Environmental Protection Agency. Retail LNG dispensers shall comply with the applicable weights and measures requirements of the Texas Department of Agriculture relating to dispensing accuracy.

(b) Appurtenances and equipment placed into LNG service shall be listed by a Category 15, 20, or 50 licensee unless:

  (1) the appurtenances or equipment are specifically prohibited for use by another section of the rules in this chapter; or

  (2) there is no test specification or procedure developed by a testing laboratory for the appurtenances or equipment.

(c) Appurtenances and equipment that are labeled but not listed and are not prohibited for use by the rules in this chapter shall be acceptable and safe for LNG service over the full range of pressures and temperatures to which they will be subjected under normal operating conditions.

(d) LP-Gas Operations may require any documentation sufficient to substantiate any claims made regarding the safety of any valves, fittings, and equipment.

(e) Drive-away protection shall be provided.

(f) Emergency shut-down devices shall be distinctly marked for easy recognition according to the requirements of Table 1 of §14.2101 of this title (relating to Uniform Protection Requirements) and shall activate a valve installed at the dispensing area that shuts off the power and gas supply to the dispensers. ESD devices shall be located as follows:

  (1) For containers with water capacity of 93,240 gallons or less, an ESD device shall be located between 35 and 50 feet from the container.

  (2) For containers with water capacity of 93,241 gallons or more, an ESD device shall be located between 60 and 75 feet from the container.

(g) Manually operated container valves shall be provided for each container.

(h) Manually operated shutoff valves shall be installed in manifolds as close as practicable to a container or group of containers.

(i) The use of hoses or arms in a fueling installation is limited to:

  (1) a vehicle fueling hose;

  (2) an inlet connection to compression equipment; or

  (3) a section of metallic hose not exceeding 36 inches in length in a pipeline to provide flexibility where necessary. Metallic hose shall be installed so that it will be protected against damage and be readily visible for inspection. The manufacturer's identification shall be retained for each section of metallic hose used.

(j) When a hose or arm of nominal three-inch diameter or larger is used for liquid transfer, or nominal four-inch diameter or larger is used for vapor transfer, an emergency shutoff valve shall be installed in the piping of the transfer system less than ten feet from the nearest end of the hose or arm. If the flow is away from the hose, a check valve may be used as the shutoff valve. If a liquid or vapor line has two or more legs, an emergency shutoff valve shall be installed in each leg.

(k) The fill line on storage containers shall be equipped with a backflow check valve to prevent discharge of LNG from the container in case of line, hose, or fitting rupture.

(l) A fueling connection and mating vehicle receptacle shall be used to transfer LNG or gas vapor to or from the vehicle.

(m) An interlock device shall be provided so that the hose coupling cannot be released while the transfer line is open. Interlock devices are not required for transports when transferring fuel to a stationary tank.

(n) The maximum delivery pressure shall not exceed the maximum allowable working pressure of the vehicle and fuel tanks.

(o) Where excess flow check valves are used, the closing flow shall be less than the flow rating of the piping system that would result from a pipeline rupture between the excess flow valve and the equipment downstream of the excess flow check valve.


Source Note: The provisions of this §14.2313 adopted to be effective May 26, 2003, 28 TexReg 4100; amended to be effective December 24, 2012, 37 TexReg 9921

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