1 Scope

1.1 This standard sets forth minimum requirements for the following types of devices for engine fuel system applications intended for use with liquefied petroleum gas (LP-Gas), natural gas, and/or manufactured gas.

1. a) Automatic shutoff valves – electrically operated or vacuum actuated (mechanical);

2. b) Combination manual/automatic shutoff valves – electrically operated or vacuum actuated (mechanical);

3. c) Carburetors or air-fuel mixers;

4. d) Regulators;

5. e) Vaporizers and vaporizer/regulators;

6. f) Filters and strainers;

7. g) Fuel locks and fuel-lock filters;

8. h) Fittings and connectors;

9. i) Quick connect couplings and quick closing couplings;

10. j) Liquid level gauges;

11. k) Liquid level control valves (also known as overfilling prevention devices);

12. l) Low level sensor;

13. m) Relief devices; and

14. n) Fuel control valves.

Summary of Topics

This First Edition of ANSI/CAN/UL/ULC 1337, Standard for LP-Gas, Natural Gas, and Manufactured Gas Devices for Engine Fuel Systems, dated December 7, 2022 is a new joint standard and has been issued to reflect the latest ANSI and SCC approval dates and to incorporate the proposals dated March 18, 2022.