UL 2351
Standard for Spray Nozzles for Fire-Protection Service

DETAILS
Edition Number:2SCC Approved:--
Edition Date:2004-06-04DOD Approved: --
Price Code:CANSI Approved: 2018-10-02
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover automatic and non-automatic (open) type water spray nozzles for installation in accordance with the Standard for Installation of Sprinkler Systems, NFPA 13, and the Standard for Water Spray Fixed Systems for Fire Protection, NFPA 15.

    1.2 Nozzles are categorized by the discharge coefficient "K" of the orifice, water discharge angle or pattern, type of coating or plating, and other factors that have a bearing on their application. Automatic nozzles are also categorized by operating temperature rating.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 General
          • 7 Inlet Threads
          • 8 Temperature Ratings
          • 9 Coatings and Platings
          • 10 Pressure Rating
          • 10A Strainer
          • 11 Protective Covers
        • PERFORMANCE
          • 12 General
          • 13 Samples
          • 14 Load on Heat Responsive Element
          • 15 Strength of Heat Responsive Element Test
            • 15.1 Fusible-alloy types
            • 15.2 Glass-bulb types
          • 15A Glass-Bulb Thermal Shock Test
          • 16 Leakage Test
          • 17 Hydrostatic Strength Test
          • 18 30-Day Leakage Test
          • 19 Water Hammer Test
          • 20 Operating Temperature (Bath) Test
          • 20A Air Bath Test for Glass Bulb Nozzles
          • 21 Sensitivity Tests
            • 21.1 General
            • 21.2 Sensitivity – oven heat test
            • 21.3 Sensitivity – room heat test for quick response (QR) nozzles
          • 22 Operation – Lodgement Test
          • 23 Flow Endurance Test
          • 24 High Temperature Exposure Test (90 Day)
          • 25 High Temperature Exposure – Test for Wax Coated Nozzles
          • 25A Heat Resistance Test
          • 26 Strength of Frame Test
          • 27 Impact Resistance Test
          • 28 Rough Usage Test
          • 29 Vibration Test
          • 30 Impact Test for Protective Covers
          • 31 Calibration Test
          • 32 Distribution Test
          • 32A Distribution Test
            • 32A.1 General
            • 32A.2 Water Collection
            • 32A.3 Spray Angle Determination
          • 33 10-Day Corrosion Test
          • 34 30-Day Corrosion Test
            • 34.1 General
            • 34.2 Salt spray
            • 34.3 Samples for moist hydrogen sulfide air mixture test and moist carbon dioxide-sulfur dioxide air mixture test
            • 34.4 Moist hydrogen sulfide air mixture
            • 34.5 Moist carbon dioxide-sulfur dioxide air mixture
          • 35 90-Day Moist Air Test
          • 36 Stress-Corrosion Cracking Of Brass Nozzle Parts Test
          • 37 Stress-Corrosion Cracking of Stainless Spray Nozzle Parts Test
          • 38 Dezincification Test of Brass Parts
            • 38.1 General
            • 38.2 Reagent
            • 38.3 Test Pieces
            • 38.4 Method
          • 39 Exposure Tests on Nozzles Incorporating Polymeric Gaskets
            • 39.1 General
            • 39.2 Corrosive exposures
            • 39.3 Temperature cycling exposure
            • 39.4 Hydrocarbon exposure followed by moist air exposure
            • 39.5 Hydrocarbon exposure followed by water immersion exposure
            • 39.6 Exposure to antifreeze solutions
          • 40 Vacuum Test
          • 41 Elastomeric Parts Test
          • 42 Freezing Test
          • 42A Evaporation Test For Wax Coatings
        • MANUFACTURING AND PRODUCTION TESTS
          • 43 General
          • 44 Production Leakage Test
          • 45 Glass Bulb Integrity Test
        • MARKING
          • 46 General
        • INSTALLATION INSTRUCTIONS
          • 47 General
    • NOTES ON THE STRENGTH TEST FOR NOZZLE RELEASE ELEMENTS (Informative)
    • Superseded List