UL 109:2020 pdf download.STANDARD FOR SAFETY-Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use.
1.1 These requirements cover fittings to be used in tubing carrying:
a) Fuel gases such as acetylene, liquefied petroleum gas (LP-gas), manufactured and natural fuel gases, and other liquefied and non-liquefied flammable gases that are stable because of their composition or because of the conditions of storage,
b) Refrigerants,
c) Gasoline or gasohol formulated in accordance with Standard Specification for Automotive Spark- Ignition Engine Fuel, ANSI/ASTM D 4814,
d) Diesel fuel formulated in accordance with Standard Specification for Diesel Fuel Oils,
ANSI/ASTM D 975,
e) Heating fuel oils formulated in accordance with Standard Specification for Fuel Oils, ANSI/ASTM D 396, and
f) Kerosene formulated in accordance with Specification for Kerosine, ANSI/ASTM D 3699.
1.2 The requirements for “Marine Use” cover fittings to be used with tubing carrying gasoline or gasohol formulated in accordance with Standard Specification for Automotive Spark-Ignition Engine Fuel, ANSI/ASTM D 4814, or diesel fuel formulated in accordance with Standard Specification for Diesel Fuel Oils, ANSI/ASTM D 975.
1.3 This standard does not cover tube fittings for liquid or gaseous Biofuels or Ethanol fuels other than gasohol noted in 1.1 (c) and 1.2.
1.4 Requirements for the selection, installation, and use of the fittings covered by this Standard are included in the Standards of the National Fire Protection Association pertaining to storage and use of flammable and combustible fluids, such as:
NFPA 30, Flammable and Combustible Liquids Code
NFPA 31, Installation of Oil-Burning Equipment
NFPA 32, Dry Cleaning Plants
NFPA 51, Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied
Processes
NFPA 54, National Fuel Gas Code
NFPA 58, Storage and Handling of Liquefied Petroleum Gases
1.5 Requirements for the selection, installation, and use of fittings for “Marine Use” as covered by this Standard are included in the Standard for Pleasure and Commercial Motor Craft, NFPA 302, and the appropriate publications of the American Boat and Yacht Council.
1.6 Deleted
2 General
2.1 Components
2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply with the requirements for that component.
2.1.2 A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or
b) Is superseded by a requirement n this standard.
2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use.
2.1.4 Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions.
2.2 Units of measurement
2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.UL 109 pdf download.