Standard for Liquid Level Gauges, Level Indicators and Aboveground Piping for Combustible Liquids

1.1 This Standard covers construction and performance requirements for the tank accessories identified in Clause 1.2, for use on atmospheric aboveground tanks not exceeding 19,927 L (5,000 U.S. gal) which are intended for the storage and supply of heating fuels for oil burning equipment, diesel fuels for compression ignition engines, motor oils (new or used) for automotive service stations, and similar combustible liquid applications.

1.2 These requirements cover the following tank accessories intended for installation in, on or connected to the storage tank in accordance with the manufacturer's instructions:

A Liquid Level Gauges – mechanical float, low-voltage electric, or other types with integral or remote indicators;

B Fill Signal Devices – “whistle vents” or similar overfill prevention devices with audible and/or visual signals; and

C Aboveground Piping Systems – aboveground pipe and fittings for tank fill & venting and supply of utilization equipment.

NOTE: Refer to UL/ULC 1369 for requirements applicable to larger diameter piping for flammable and combustible liquids intended for motor vehicle fueling and generator supply applications.

1.3 These requirements do not cover any tank accessories for products covered by the requirements of:

A UL 565 and ULC/ORD-C565 for electrical liquid level gauges for flammable liquid tanks;

B UL 1238 and CAN/CSA-C22.2 No. 61010-1 for electrical fill signal devices for flammable liquid tanks;

C UL 971, UL 971A, or CAN/ULC-S679 for underground piping systems, or UL 2039 or CAN/ULC-S633 for flexible connector pipe;

D UL 1238 and CAN/ULC-S675.1 or CAN/ULC-S675.2 for leak detection devices for flammable liquid tanks;

E UL 2583 for fill pipe caps, pressure vacuum vents or emergency vents for flammable liquid tanks;

F UL 2085 and CAN/ULC-S661 for spill containment devices for flammable liquid tanks;

G UL 2085 and CAN/ULC-S663 for overfill prevention devices for flammable liquid tanks; or

H UL 331 and ULC/ORD-C331 for filters and strainers for flammable & combustible liquids.

1.4 The products covered by this Standard are intended for installation and use in accordance with the applicable Codes and Regulations as determined by the Authority Having Jurisdiction (AHJ), such as:

In the United States:

A     Flammable and Combustible Liquids Code, NFPA 30;

B      Code for Motor Fuel Dispensing Facilities and Garages, NFPA 30A;

C      Uniform Fire Code, NFPA 1;

D     International Fire Code published by the International Fire Council; and/or

E      Other applicable federal and state regulations for combustible liquid tank accessories.

In Canada:

A. The National Fire Code of Canada;

B CAN/CSA-B139, Installation Code for Oil Burning Equipment;

C CCME Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products; and/or

D Provincial or other Regulations.

1.5 These requirements do not cover special evaluations for resistance to, or use after hurricanes, tornadoes, earthquakes, floods, fires or other natural disasters; or resistance to vehicle impact.

1.6 These requirements do not cover evaluation of either resistance to, or emission of, electromagnetic interference, or compliance with FCC regulations for electrical products with local or remote signal features, or the effectiveness of optional wired or wireless signal communications to remote service providers or central station monitors.

1.7 These requirements do not cover any applications with flammable liquids, or for electric gauging or signals, use in hazardous (classified) locations, or waste oils that may contain high levels of contaminants and/or flammable liquids.

1.8 These requirements do not cover use with waste oils or other combustible liquids with different physical or material compatibility properties than they are evaluated for, but do cover bio diesel blends up to 20 %, or up to 100 % bio diesel if optionally tested.