UL 2167:2021 pdf download.STANDARD FOR SAFETY-Water Mist Nozzles for Fire Protection Service.
1.1 UL 2167: contains requirements for water mist nozzles for use with water mist fire-protection systems intended for the protection of residential, light and ordinary hazard areas as well as shipboard machinery, control spaces, service areas, and public spaces. The intended application and use of a water mist nozzle is referenced in the Manufacturer’s Design and Installation Instructions. See Section 49, Design and Installation Instructions.
1.2 This Standard is intended to address minimum fire-protection performance, construction, and marking requirements for water mist nozzles.
2 Units of Measurement
2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
3 Components
3.1 Except as indicated in 3.2, a component of a product covered by this standard shall comply with the requirements for that component.
3.2 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b) Is superseded by a requirement in this standard.
3.3 A component shall be used in accordance with its rating established for the intended conditions of use.
3.4 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.
4 Undated References
4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be
interpreted as referring to the latest edition of that code or standard.
5 Glossary
5.1 For the purpose of this standard, the following definitions apply.
5.2 CONDUCTIVITY FACTOR — A measure of the conductance between the nozzle’s heat responsive element and the fitting expressed in units of (m/s).
5.3 CONTROL SPACES — Shipboard areas such as the bridge, radio room, and emergency power room.
5.4 CORROSION RESISTANT MATERIAL — A material (such as bronze, brass, stainless steel, or plastic) which has a low propensity for corrosion when used in its anticipated application.
5.5 DESIGN LOAD — The force exerted on the release element at the service load of the nozzle.
5.6 ENGINEERED WATER MIST SYSTEMS — A system which requires individual design and calculation to determine the flow rates, nozzle pressures, pipe size, area or volume protected by each nozzle, discharge density, the number and type of nozzles, and the nozzle placement in order to protect a specific hazard.
5.7 FIRE CONTROL — Limiting the growth of a fire and controlling ceiling gas temperatures to prevent structural damage.
5.8 FIRE SUPPRESSION — The sharp reduction of the heat release of a fire and the prevention of its reg rowth.
5.9 FLAME SPREAD INDEX (FSI) — A fire spread characteristic measured in accordance with the Standard for Test for Surface Burning Characteristics of Building Materials, ANSI/UL 723.UL 2167 pdf download.