LIQUEFIED PETROLEUM GAS LIQUIDMEASURING DEVICES [1957]

GENERAL CODE REFERENCES.-Liquefied petroleum gas liquid-measuring devices shall conform to all of the applicable requirements of the General Code, particularly G-S.1., G-S.2., G-S.3., G-S.4., G-S.5.1.1., G-S.5.1.2., G-S.5.1.3., G-S.5.2., G-S.5.3.1., G-S.5.3.2., G-S.5.3.3., G-S.6., G-T.5., and G-T.6. See also general regulations G-R.2.. G-R.3., G-R.4., and G-R.5.

A. APPLICATION.

A.1.-This code applies to liquefied petroleum gas liquidmeasuring devices, as defined. Insofar as they are clearly appropriate, the requirements and provisions of this code may be applied to devices used for dispensing other liquids that do not remain in a liquid state at atmospheric pressures and temperatures.

D. DEFINITIONS.

D.1. LIQUEFIED PETROLEUM GAS LIQUID-MEASURING DEVICE.-A system including a mechanism or machine of the meter type designed to measure and deliver liquefied petroleum gas in the liquid state by definite volume, whether installed in a permanent location or mounted on a vehicle. Means may or may not be provided to indicate automatically, for one of a series of unit prices, the total money value of the liquid measured.

D.2. LIQUEFIED PETROLEUM GAS.-A petroleum product composed predominantly of any of the following hydrocarbons, or mixtures thereof: propane, propylene, butanes (normal butane or isobutane), and butylenes.

D.3. RETAIL DEVICE.-A device used for single deliveries of liquefied petroleum gas for domestic use and, in addition, any motor-fuel device (see D.4.).

D.4. MOTOR-FUEL DEVICE.-A stationary device used for retail deliveries of liquefied petroleum gas as motor fuel to the fuel tanks of individual highway vehicles.

D.5. WHOLESALE DEVICE.-Any device other than a retail device.

1957 Addition

S. SPECIFICATIONS.

SPECIFICATIONS APPLICABLE TO BOTH RETAIL AND WHOLESALE DEVICES

S.1. UNITS.-A liquefied petroleum gas liquid-measuring device shall indicate its deliveries in terms of gallons or binary or decimal submultiples of the gallon.

S.2. DESIGN.

S.2.1. SENSITIVENESS.-A device shall be readily operable to deliver accurately each quantity that the device holds itself forth to deliver. If the most sensitive element of the indicating system utilizes an indicator and graduations, the relative movement of these parts corresponding to the smallest unit of indicated delivery shall be not less than 0.20 inch.

S.2.2. DIVERSION OF MEASURED LIQUID.-No means shall be provided by which any measured liquid can be diverted from the measuring chamber of the meter or the discharge line therefrom, except that a manually controlled outlet that may be opened for the purpose of emptying a portion of the system to allow for repair and maintenance operations shall be permitted; effective July 1, 1957, effective means shall be provided to prevent the passage of liquid through any such outlet during normal operation of the device and to indicate clearly and unmistakably when the valve controls are so set as to permit passage of liquid through such outlet.

S.2.3. VAPOR ELIMINATION.-A device shall be equipped with effective means to prevent passage of vapor through the meter.

S.2.4. MAINTENANCE OF LIQUID STATE.-A device shall be so designed and installed that the product being measured will remain in a liquid state during passage through the meter.

S.2.5. THERMOMETER WELL.-Means shall be provided for inserting, for test purposes, a mercury-in-glass thermometer either (a) in the liquid chamber of the meter or (b) in the meter inlet or discharge line and immediately adjacent to the meter.

S.3. INDICATING ELEMENTS. (See also S.11. and S.20.)

S.3.1. READABILITY. Quantity and money-value indications shall be readable from any reasonable customer position.