UL - 25 BULLETIN
UL Standard for Safety Meters for Flammable and Combustible Liquids and LP-Gas
|Publication Date:||12 February 2021|
These requirements cover:
a) Meters for flammable and combustible liquids, of the type and size commonly used in the assembly of motor fuel dispensing devices; and
b) Meters for liquefied petroleum gas (LP-Gas), of the type and size commonly used in the assembly of motor fuel dispensing devices and tank trucks.
The meters are of the positive liquid displacement type.
NOTE: For the purposes of this standard the terms "LP-Gas" and "Propane" are interchangeable.
"Flammable and Combustible Liquids shall be handled at pressures not exceeding 50 psi (350 kPa) and at temperatures within the range of 29 °C (20 °F) to- 52 °C (125 °F).
Products covered by this Standard are intended to be installed and used in accordance with the applicable Codes and Regulations as determined by the Authority Having Jurisdiction (AHJ), such as, but not limited to:
In the United States:
a) Flammable and Combustible Liquids Code, NFPA 30;
b) Code for Motor Fuel Dispensing Facilities and Repair Garages, NFPA 30A;
c) Liquefied Petroleum Gas Code, NFPA 58.
These requirements do not cover:
a) Meters for use with liquefied petroleum gas in the gaseous phase;
b) Velocity meters, head meters, or area meters;
c) Meters for use in centralized fuel oil distribution systems; and
d) Meter components incorporating electrical circuits except those meeting intrinsically safe or explosion standards.
Determinations of the suitability of registers, counters, or computers used or provided with these meters, or the accuracy of measurement resulting from or required in actual application are not within the scope of these requirements.
For requirements for meters for gasoline/ethanol blends with nominal ethanol concentrations above 10 %, refer to the Standard for Meters for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations up to 85 Percent (E0 - E85), UL 25A, for additional requirements.
For requirements for meters for biodiesel fuel, diesel/biodiesel blends with nominal biodiesel concentrations up to 20 % (B20), refer to the Standard Meters for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil, UL 25B for additional requirements.