Extinguishing system units

Fire extinguishing systems involve a complex interplay of components-everything from the containers that store extinguishing agents to the detection, actuation and distribution systems and discharge devices that make them work. More than 60 years ago, UL developed the tests required to rate and certify a broad range of fire extinguishing systems. The simulated tests it performs ensure that these systems protect facilities against specific classes or types of fires and hazards.

Depending on the product type and application, UL may conduct tests at a UL facility or at a designated site with a UL representative present. Listed products appear in UL Product Directories that are referenced by over 2,500 Authorities Having Jurisdiction (AHJs) and code officials annually.

Test Standards

Current editions of the following Standards are used to evaluate and certify extinguishing system units.

Installation Standards:

• NFPA 2001, Clean Agent Fire Extinguishing Systems
• NFPA 12, Carbon Dioxide Extinguishing Systems
• NFPA 17, Dry Chemical Extinguishing Systems
• NFPA 17A, Wet Chemical Extinguishing Systems
• NFPA 11, Low-, Medium-, and High-Expansion Foam
• NFPA 16, Foam-Water Sprinkler and Foam-Water Spray Systems
• NFPA 20, Stationary Pumps for Fire Protection

Safety and performance Standards:

• UL 2127, Inert Gas Clean Agent Extinguishing System Units
• UL 2166, Halocarbon Clean Agent Extinguishing System Units
• NFPA 12, Carbon Dioxide Extinguishing Systems
• UL 1254, Pre-Engineered Dry Chemical Extinguishing System Units
• UL 300, Fire Testing of Fire Extinguishing Systems for Protection of Commercial Cooking Equipment
• UL 162, Foam Equipment and Liquid Concentrates
• UL Subject 139, High-Expansion Foam-Extinguishing System Equipment and Concentrates
• UL Subject 448C, Stationary, Rotary-Type, Positive-Displacement Pumps for Fire Protection Service

The UL advantage

UL works closely with fire extinguishing systems manufacturers to determine the appropriate test programs for product evaluation. It also supports manufacturers during the product development cycle by matching product components to existing standards and by addressing specific design and performance challenges. In addition, UL engineers can help resolve system performance issues that arise with products in the field. By collaborating with UL, manufacturers can streamline the testing and certification process, control testing costs, accelerate time-to-market and ensure that all systems meet the highest industry standards.