UL 1254
Standard for Pre-Engineered Dry Chemical Extinguishing System Units

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2013-02-21DOD Approved: --
Price Code:CANSI Approved: 2017-09-07
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover the construction and operation of fixed pre-engineered dry chemical fire extinguishing system units and fixed automatic extinguisher units intended to be used in accordance with the Standard for Dry Chemical Extinguishing Systems, NFPA 17.

    1.2 Automatic extinguisher units do not have a manual means of operation and are intended to be used in accordance with the manufacturer's installation instructions. Automatic extinguisher units are not intended for use as a substitute for pre-engineered dry chemical extinguishing system units, or for protection of fire risks larger than those specified in the manufacturer's instructions for a single unit by using multiple units.

    1.3 Pre-engineered dry chemical extinguishing system units covered by these requirements are intended to be used in the following fire protection systems:

    a)    Industrial Total Flooding Protection System – A system arranged to discharge dry chemical throughout the intended protected volume. See Fire Test – Total Flooding Protection System, Section 26.

    b)    Class B Local Application Protection System – A system arranged to discharge dry chemical directly onto a specific area of protection. This application of chemical is normally used where no fixed enclosure exists or an extinguishing system is unable to totally flood the fixed enclosure to achieve extinguishment. See Fire Test – Class B Local Application Protection System, Section 27.

    c)     Commercial Cooking Equipment Protection System – A system arranged to discharge dry chemical onto cooking surfaces of cooking appliances and into hood and duct systems used for ventilation of commercial cooking appliances. See the Standard for Fire Testing of Fire Extinguishing Systems for Protection of Commercial Cooking Equipment, UL 300.

    d)    Automobile Service Station Fueling Area Protection System – A system arranged to discharge dry chemical directly onto small spill fires that originate and are maintained within the protected area. See Fire Test – Automobile Service Station Fueling Area Protection System, Section 28.

    e)    Open-Face Paint Spray Booth Protection System – A system arranged to discharge dry chemical into paint spray working areas and into the plenum and duct systems used for ventilation of paint spraying operations. See Fire Test – Open-Face Point Spray Booth Protection System, Section 29.

    f)    Vehicle Paint Spray Booth – A system arranged to discharge dry chemical into paint spray working areas and onto the plenum and duct systems used for ventilation of paint spraying operations. See Fire Test – Vehicle Paint Spray Booth Protection System, Section 30.

    g)    Off-the-Road Vehicle Protection System – A system arranged to discharge dry chemical onto fire risk areas and into volumes of vehicles such as aboveground mobile mining equipment, and mobile earthmoving equipment. See Fire Test – Total Flooding Protection System, Section 26, and/or Fire Test– Class B Local Application Protection System, Section 27, as applicable.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 General
          • 7 Electrically Operated Alarms
          • 8 Controls and Indicators
          • 9 Caps, Valves, and Closures
          • 10 Pressure Vessels and Cylinders
          • 11 Gaskets and O-Rings
          • 12 Gas Cartridges
          • 13 Pressure Regulators
          • 14 Pressure Gauges
          • 15 Puncturing Mechanisms
          • 16 Siphon Tubes
          • 17 Dry Chemical Agents
          • 18 Expellant Gases
          • 19 Polymeric Materials and Nonmetallic Parts
          • 20 Anti-Recoil Devices
          • 21 Flexible Hose Assemblies Used for Distribution of Agent
          • 22 Electrically Operated Devices
          • 23 Pressure Switches
          • 24 Nozzles
        • PERFORMANCE
          • 25 General
          • 26 Fire Test – Total Flooding Protection System
            • 26.1 General
            • 26.2 Class A fire tests
            • 26.3 Class B fire tests
            • 26.4 Automatic extinguisher units
          • 27 Fire Test – Class B Local Application Protection System
          • 28 Fire Test – Automobile Service Station Fueling Area Protection System
          • 29 Fire Test – Open-Face Paint Spray Booth Protection System
            • 29.1 General
            • 29.2 Test apparatus
            • 29.3 General test method
            • 29.4 Class A fire tests
            • 29.5 Class B fire tests
          • 30 Fire Test – Vehicle Paint Spray Booth Protection System
            • 30.1 General
            • 30.2 Test apparatus
            • 30.3 General test method
            • 30.4 Class A fire tests
            • 30.5 Class B fire tests
          • 31 Fire Test and Appliance Splash Test – Commercial Cooking Equipment Protection System
          • 32 Flow Distribution Tests
          • 33 Hydrostatic Pressure Test
            • 33.1 Pressure vessels and gas cartridges
            • 33.2 Other devices subject to pressure
            • 33.3 Test method
          • 34 30-Day Elevated Temperature Test
          • 35 Temperature Cycling Test
          • 36 Salt Spray Corrosion Test
          • 37 500 Cycle Operation Test
          • 38 One-Year Time Leakage Test
          • 39 Mounting Device Test
          • 40 Flexible Hose Assembly Low Temperature Test
          • 41 Flexible Hose Assembly Cycling Test
          • 42 Flexible Hose Assembly Fire Exposure Test
          • 43 Operation Test of Manual Actuators and Manual Pull Stations
          • 44 Pneumatic Operation Test
          • 45 Pressure Relief Tests
          • 46 Vibration and Shock Resistance Test
            • 46.1 General
            • 46.2 Vibration test
            • 46.3 Shock resistance test
          • 47 Elastomeric Parts Test
          • 48 10-Day Moist Ammonia Air Stress Cracking Test
          • 49 Aging Tests – Plastic Materials
            • 49.1 Air-oven aging test
            • 49.2 Exposure to extinguishing agent test
            • 49.3 Light and water test
          • 50 Extinguishing Agent Tests
            • 50.1 General
            • 50.2 Elevated temperature test
            • 50.3 Hygroscopicity test
            • 50.4 Dielectric strength test
          • 51 Calibration Test – Gauges and Indicators
          • 52 Burst Strength Test – Gauges and Indicators
          • 53 Overpressure Test – Gauges
          • 54 Impulse Test – Gauges
          • 55 Pressure Gauge Relief Test
          • 56 Water Resistance Test – Gauges and Indicators
          • 57 Nameplate Exposure Tests
          • 58 Nameplate Adhesion Test
          • 59 Nameplate Abrasion Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 60 General
            • 60.1 Manufacturer's Tests
            • 60.2 Hydrostatic pressure test– shells
            • 60.3 Non-DOT gas cartridges
            • 60.4 Gauge calibration test
            • 60.5 Leakage test
        • PACKING FOR SHIPMENT
          • 61 General
        • MARKINGS
          • 62 General
        • INSTALLATION INSTRUCTIONS
          • 63 Installation, Operation, and Maintenance Instruction Manual
          • 64 Owner's Manual
    • APPENDIX A