Approval Standard

for Water Mist Systems

Class Number 5560

March 2009

2009 FM Approvals LLC. All rights reserved.

Foreword

The FM Approvals certification mark is intended to verify that the products and services described will meet FM Approvals stated conditions of performance, safety and quality useful to the ends of property conservation. The purpose of Approval Standards is to present the criteria for FM Approval of various types of products and services, as guidance for FM Approvals personnel, manufacturers, users and authorities having jurisdiction.

Products submitted for certification by FM Approvals shall demonstrate that they meet the intent of the Approval Standard, and that quality control in manufacturing shall ensure a consistently uniform and reliable product. Approval Standards strive to be performance-oriented. They are intended to facilitate technological development.

For examining equipment, materials and services, Approval Standards:

a) must be useful to the ends of property conservation by preventing, limiting or not

causing damage under the conditions stated by the Approval listing; and

b) must be readily identifiable.

Continuance of Approval and listing depends on compliance with the Approval Agreement, satisfactory performance in the field, on successful re-examinations of equipment, materials, and services as appropriate, and on periodic follow-up audits of the manufacturing facility.

FM Approvals LLC reserves the right in its sole judgment to change or revise its standards, criteria, methods, or procedures.

Table of Contents

1. INTRODUCTION .................................................................................................................................................... 1 1.1 Purpose ............................................................................................................................................................. 1 1.2 Scope ................................................................................................................................................................ 1

Table 1.2.3.12. Nominal Flash Points and Auto Ignition Temperatures (AIT) of Typical Commonly Used Cooking Oils................................................................................................................................................ 5

1.3 Basis for Requirements ..................................................................................................................................... 6 1.4 Basis for Approval ............................................................................................................................................ 6 1.5 Basis for Continued Approval .......................................................................................................................... 6 1.6 Effective Date ................................................................................................................................................... 7 1.7 System of Units................................................................................................................................................. 7 1.8 Applicable Documents...................................................................................................................................... 7 1.9 Definitions ...................................................................................................................................................... 10 1.10 References....................................................................................................................................................... 18

2. GENERAL INFORMATION................................................................................................................................. 19 2.1 Product Information........................................................................................................................................ 19 2.2 Approval Application Requirements .............................................................................................................. 19 2.3 Requirements for Samples for Examination ................................................................................................... 20

3. GENERAL REQUIREMENTS .............................................................................................................................. 20 3.1 Review of Documentation .............................................................................................................................. 20 3.2 Physical or Structural Construction Features.................................................................................................. 20 3.3 Components .................................................................................................................................................... 22 3.4 Markings......................................................................................................................................................... 22

Table 3.4.5 Temperature Ratings, Classifications, and Color Codes................................................................ 24 Table 3.4.6 Temperature Ratings and Bulb Color Codes ................................................................................. 24

3.5 Manufacturer's Design, Installation and Operation Instructions..................................................................... 25 3.6 Calibration ...................................................................................................................................................... 25 3.7 Test Facilities.................................................................................................................................................. 26 3.8 Tolerances....................................................................................................................................................... 26

4. PERFORMANCE REQUIREMENTS ................................................................................................................... 26 4.1 General Examination and Performance Requirement Test Procedures .......................................................... 26

4.1.1 Examination............................................................................................................................................. 26 4.1.2 Valve Seat Leakage ................................................................................................................................. 27 4.1.3 Hydrostatic Strength ................................................................................................................................ 27 4.1.4 Operating Pressure................................................................................................................................... 27 4.1.5 Durability - Cycling................................................................................................................................. 28 4.1.6 Extreme Temperatures Operation............................................................................................................ 28 4.1.7 Salt Spray Corrosion................................................................................................................................ 29 4.1.8 Vibration Resistance................................................................................................................................ 29

Table 4.1.8 Vibration Conditions ..................................................................................................................... 30 4.1.9 Valve Locking/Supervision Ability ......................................................................................................... 30 4.1.10 Friction Loss Determination .................................................................................................................... 30 4.1.11 Seals and O-rings..................................................................................................................................... 31 4.1.12 Pipe Coupling Gaskets............................................................................................................................. 32

4.2 Water Mist Nozzles ........................................................................................................................................ 32 4.2.1 Assembly Load/Frame Strength (Automatic/Closed Nozzles only) ........................................................ 32 4.2.2 Strength of Heat Responsive Element (Automatic/Closed Nozzles only) ............................................... 33 4.2.3 Leakage (Automatic/Closed Nozzles only) ............................................................................................. 34

4.2.4 Hydrostatic Strength (Automatic/Closed Nozzles only) ..........................................................................35 4.2.5 30-Day Leakage (Automatic/Closed Nozzles only).................................................................................35 4.2.6 Water Hammer (Automatic/Closed Nozzles only) ..................................................................................35 4.2.7 Operating Temperature (Liquid Bath) (Automatic/Closed Nozzles only) ...............................................36

Table 4.2.7.2 Liquid Bath Conditions...............................................................................................................36 4.2.8 Air Bath (Automatic/Closed Nozzles only) .............................................................................................37 4.2.9 Hang-Up of Operating Parts (Automatic/Closed Nozzles only) ..............................................................37

Table 4.2.9.2. Test Pressures ............................................................................................................................38 4.2.10 Strength of Deflector (Flow Endurance)..................................................................................................38 4.2.11 Vacuum (Automatic/Closed Nozzles only)..............................................................................................38 4.2.12 High Ambient Temperature Exposure (90 Day Test) (Automatic/Closed Nozzles only)........................39

Table 4.2.12.1A High Ambient Temperature Exposure Test Conditions .........................................................39 Table 4.2.12.1C Permitted Softening Points of Volatile Nozzle Coatings .......................................................40

4.2.13 Thermal Shock (Glass Bulb Nozzles Only) .............................................................................................40 4.2.14 Discharge Coefficient, K-Factor ..............................................................................................................41 4.2.15 Moist Air (Any nozzle with moving parts) ..............................................................................................41 4.2.16 Corrosion - Salt Spray..............................................................................................................................42 4.2.17 Corrosion - Stress Cracking .....................................................................................................................43 4.2.18 Corrosion - Carbon Dioxide-Sulfur Dioxide............................................................................................45 4.2.19 Corrosion - Hydrogen Sulfide..................................................................................................................46 4.2.20 Vibration ..................................................................................................................................................47

Table 4.2.20.2 Vibration Conditions.................................................................................................................47 4.2.21 Rough Use and Abuse..............................................................................................................................48 4.2.22 High Temperature Exposure ....................................................................................................................49 4.2.23 Freezing (Automatic/Closed Nozzles only) .............................................................................................49 4.2.24 Minimum Operating Pressure (Any nozzle with moving parts) ..............................................................49 4.2.25 Process Residue .......................................................................................................................................50 4.2.26 Conductivity (C-Factor) (Automatic/Closed Nozzles Only)....................................................................50

Table 4.2.26.2 Range of Test Conditions for C-factor......................................................................................51 4.2.27 Sensitivity - Response Time Index (RTI) (Automatic/Closed Nozzles only) ..........................................52

Figure 4.2.27.1 RTI and C-Factor Limits for Best Case Orientation ................................................................53 Table 4.2.27.2 Plunge Test Conditions .............................................................................................................54

4.2.28 Sensitivity (Recessed, Flush, and Concealed Types) (Automatic/Closed Nozzles Only)........................54 Table 4.2.28.2.1 RTI and C-Factor Combinations............................................................................................55 Table 4.2.28.2.2 Tunnel Conditions..................................................................................................................55

4.2.29 Sensitivity (Air Oven) (Automatic/Closed Nozzles only) .......................................................................56 Table 4.2.29.1.1 Air Oven Nozzle Sensitivity for New, Uncoated Nozzles Utilizing the Time vs. Temperature

Data per Table 4.2.29.2..............................................................................................................................56 Table 4.2.29.1.2 Air Oven Nozzle Sensitivity for New Nozzles Having Corrosion Resistant Coating Utilizing

the Time vs. Temperature Data per Table 4.2.29.2....................................................................................56 Table 4.2.29.1.3. Air Oven Nozzle Sensitivity for Aged or Elevated Temperature Exposed Nozzles Having

Corrosion Resistant Coating Utilizing the Time vs. Temperature Data per Table 4.2.29.2.......................56 Table 4.2.29.2 Time vs. Temperature Points for air Oven Nozzle Sensitivity Test..........................................57

4.2.30 Water Mist Discharge Characteristics......................................................................................................57 4.2.31 Impingement (Automatic/Closed Nozzles only)......................................................................................58 4.2.32 Protective Caps ........................................................................................................................................58

4.3 Automatic Releases.........................................................................................................................................58 4.4 Ball Valve (Manual and Pneumatic Actuation) ..............................................................................................58

4.4.1 Ball or Disc Strength................................................................................................................................58 4.4.2 Stem Seal .................................................................................................................................................59 4.4.3 Operating Force Test................................................................................................................................59 4.4.4 Stability Test - Disc Type Valves Only ...................................................................................................59 4.4.5 Additional Performance Tests (as applicable) .........................................................................................60

4.5 Check and Shuttle Valves ...............................................................................................................................60 4.5.1 Clapper - Poppet Strength ........................................................................................................................60 4.5.2 Additional Performance Tests (as applicable) .........................................................................................60

4.6 Connection Block Assembly Cylinder Manifold .........................................................................................61 4.6.1 Performance Tests (as applicable) ...........................................................................................................61

4.7 Control Panel .................................................................................................................................................. 61 4.8 Cylinder Burst Discs - Sealing Membrane Rupture Disc Assemblies ......................................................... 61

4.8.1 Pressure Operation................................................................................................................................... 61 4.8.2 Pressure Relief Calculations .................................................................................................................... 62

4.9 Cylinder, Gas Storage ..................................................................................................................................... 62 4.9.1 Construction Design ................................................................................................................................ 62 4.9.2 One Year Leakage Loss Test ................................................................................................................... 62 4.9.3 Extreme Low Temperature Test .............................................................................................................. 63 4.9.4 Extreme High Temperature Test.............................................................................................................. 63 4.9.5 Hydrostatic Integrity................................................................................................................................ 64 4.9.6 Permanent Volumetric Expansion ........................................................................................................... 64 4.9.7 Additional Performance Tests (as applicable) ......................................................................................... 65

4.10 Cylinder Valve Assembly............................................................................................................................... 65 4.10.1 Performance Tests (as applicable) ........................................................................................................... 65

4.11 Detection Devices (Fire & Smoke)................................................................................................................. 65 4.12 Drain/Fill Valve (as applicable)...................................................................................................................... 66 4.13 Fittings and Piping (Including Couplings and Tubing)................................................................................... 66

4.13.1 Joining Methods ...................................................................................................................................... 66 4.13.2 Additional Performance Tests (as applicable) ......................................................................................... 66

4.14 Flow Switches (Pressure Actuated) ................................................................................................................ 67 4.14.1 Actuation Point Accuracy and Repeatability ........................................................................................... 67 4.14.2 Dielectric Strength ................................................................................................................................... 67 4.14.3 Additional Performance Tests (as applicable) ......................................................................................... 68

4.15 Foam Equipment (Foam, Injector, Proportioner, Pumps, Valves, etc.) .......................................................... 68 4.15.1 General .................................................................................................................................................... 68 4.15.2 Film Forming Test ................................................................................................................................... 70 4.15.3 Foam Quality Tests.................................................................................................................................. 70

Table 4.15.3.1 Quality Equivalency Limits ...................................................................................................... 71 Figure 4.15.3.2.1 Typical Foam Slider ............................................................................................................. 72

4.15.4 Verification of Liquid-Concentrate Concentration .................................................................................. 74 4.15.5 Additional Foam Equipment Component Performance Tests (as applicable) ......................................... 74

4.16 High Pressure Flexible Distribution Hose ...................................................................................................... 74 4.16.1 Fatigue Test ............................................................................................................................................. 74 4.16.2 Vacuum Test............................................................................................................................................ 75 4.16.3 Seal Integrity Test.................................................................................................................................... 75 4.16.4 High Pressure Flow Test.......................................................................................................................... 76 4.16.5 Additional Performance Tests (as applicable) ......................................................................................... 76

4.17 Injectors (Gas or Liquid)................................................................................................................................. 77 4.17.1 Clogging Test .......................................................................................................................................... 77

Table 4.17 Water/Particle Mixture for Cycling Test ........................................................................................ 77 4.17.2 Additional Performance Tests (as applicable) ......................................................................................... 77

4.18 Level Switch (Water)...................................................................................................................................... 78 4.18.1 Equipment Assembly Rating (Voltage Variation) ................................................................................... 78 4.18.2 Dielectric Strength ................................................................................................................................... 78 4.18.3 Additional Performance Tests (as applicable) ......................................................................................... 78

4.19 Manual Pull Station/Manual Release.............................................................................................................. 79 4.19.1 Manual Release Specifications ................................................................................................................ 79

4.20 Mounting Cylinder Bracket ............................................................................................................................ 79 4.20.1 High Pressure Discharge Test.................................................................................................................. 79 4.20.2 Catastrophic Failure Test......................................................................................................................... 80

4.21 Pneumatic Actuated Plastic Valves................................................................................................................. 80 4.21.1 Quick Burst Test ...................................................................................................................................... 80 4.21.2 Threaded Connection Torque Test .......................................................................................................... 80 4.21.3 Water Immersion Test ............................................................................................................................. 81 4.21.4 Ultraviolet Light and Water Test ............................................................................................................. 81 4.21.5 Air-Oven Aging Test ............................................................................................................................... 82

4.21.6 Additional Performance Tests (as applicable) .........................................................................................82 4.22 Pneumatic Actuator.........................................................................................................................................83

4.22.1 Pressure Requirement Activation Test.....................................................................................................83 4.22.2 Additional Performance Tests (as applicable) .........................................................................................83

4.23 Pressure Gauges ..............................................................................................................................................83 4.23.1 General.....................................................................................................................................................83 4.23.2 Durability .................................................................................................................................................83 4.23.3 Readability ...............................................................................................................................................84 4.23.4 Accuracy ..................................................................................................................................................84 4.23.5 Hysteresis.................................................................................................................................................84 4.23.6 Overpressure ............................................................................................................................................84 4.23.7 Hydrostatic Strength ................................................................................................................................85 4.23.8 Vibration ..................................................................................................................................................85 4.23.9 Wear.........................................................................................................................................................85 4.23.10 Salt Spray Corrosion ................................................................................................................................85 4.23.11 Moisture ...................................................................................................................................................86

4.24 Pressure Control Devices - Automatic - Dump - Reducing - Reducing Station - Regulating - Relief - Restricting - Safety - Unloader Valves............................................................................................................86

4.24.1 Diaphragm Strength .................................................................................................................................86 4.24.2 Disc Assembly, or Equivalent Component/Disc Strength .......................................................................86 4.24.3 Operating Pressure ...................................................................................................................................87 4.24.4 Durability - Cycling .................................................................................................................................87 4.24.5 Additional Performance Tests (as applicable) .........................................................................................87

4.25 Pressure Switches............................................................................................................................................88 4.25.1 Dielectric Strength ...................................................................................................................................88 4.25.2 Additional Performance Requirements (as applicable)............................................................................88

4.26 Sequence (Cycle) Box (Fire Alarm Signaling System)...................................................................................88 4.27 Sight Glass ......................................................................................................................................................89

4.27.1 Hydrostatic Pressure Test.........................................................................................................................89 4.27.2 Impact Test ..............................................................................................................................................89

4.28 Solenoid Valves ..............................................................................................................................................90 4.28.1 Equipment Assembly Ratings (Voltage Variation)..................................................................................90 4.28.2 Dielectric Strength ...................................................................................................................................90 4.28.3 Additional Performance Tests (as applicable) .........................................................................................90

4.29 Suction Filters/Strainers ..................................................................................................................................91 4.29.1 Hydrostatic Pressure Test.........................................................................................................................91 4.29.2 Filter Rating or Strainer Mesh Opening...................................................................................................91 4.29.3 Additional Performance Tests (as applicable) .........................................................................................91

4.30 Water Mist System Pumps ..............................................................................................................................92 4.30.1 Documentation Requirements..................................................................................................................92 4.30.2 Hydraulic Pump Performance..................................................................................................................92 4.30.3 Endurance Test.........................................................................................................................................93 4.30.4 Flange and Gasket Tightness ...................................................................................................................93 4.30.5 Hydrostatic Strength ................................................................................................................................94 4.30.6 Pressure relief valves ...............................................................................................................................94

Figure 4.30 Typical Water Mist System Pump Piping and Fittings..................................................................94 4.31 Water Storage Tanks .......................................................................................................................................95

4.31.1 Documentation Review............................................................................................................................95 4.31.2 Additional Performance Tests (as applicable) .........................................................................................95

4.32 Water Valves (Control) ...................................................................................................................................96 4.32.1 Performance Tests (as applicable) ...........................................................................................................96

4.33 Pipe Hangers and Hydraulic Tube Clamping Components.............................................................................96 4.34 Hydraulic Calculations Method ......................................................................................................................96

4.34.1 Calculation Method..................................................................................................................................96 4.34.2 Computer Program...................................................................................................................................97 4.34.3 Verification of Flow.................................................................................................................................97

4.35 Design, Installation, Operation and Maintenance Manual.............................................................................. 97 4.36 System Acceptance and Commissioning Documentation............................................................................... 98 4.37 Fire Tests ........................................................................................................................................................ 99 4.38 Additional Tests.............................................................................................................................................. 99

5. OPERATIONS REQUIREMENTS........................................................................................................................ 99 5.1 Demonstrated Quality Control Program ....................................................................................................... 100

5.1.1 Quality Assurance Program................................................................................................................... 100 5.1.2 Documentation/Manual ......................................................................................................................... 100 5.1.3 Records .................................................................................................................................................. 100 5.1.4 Drawing, Specification, and Document and Change Control ................................................................ 100

5.2 Facilities and Procedures Audit (F&PA) ...................................................................................................... 102 5.3 Installation Inspections ................................................................................................................................. 102 5.4 Manufacturer's Responsibilities .................................................................................................................... 102 5.5 Manufacturing and Production Tests ............................................................................................................ 102

5.5.1 Test Requirement No. 1 - System Operation ......................................................................................... 102 5.5.2 Test Requirement No. 2 Nozzles (Automatic/Closed nozzles only)................................................... 103 5.5.3 Test Requirement No. 3 - Equipment Seat Leakage.............................................................................. 103 5.5.4 Test Requirement No. 4 - Equipment Hydrostatic Strength .................................................................. 103 5.5.5 Test Requirement No. 5 - Pump Driver Performance Test.................................................................... 103 5.5.6 Test Requirement No. 6 - Pump Performance Test ............................................................................... 103 5.5.7 Test Requirement No. 7 - Cylinder/Storage Container Leakage Test.................................................... 103

Fire Performance Testing Requirements....................................................................................................................... 104 APPENDIX A: Fire Tests for Water Mist Systems for the Protection of Machinery Spaces with Volumes not

Exceeding 2825 ft3 (80 m3) .................................................................................................................................. 106 A.1 Test Enclosure (see Figure A-1) ................................................................................................................... 106 A.2 Machinery Equipment Mockup .................................................................................................................... 106 A.3 Instrumentation and Test Equipment Requirements ..................................................................................... 106 A.4 Fire Tests ...................................................................................................................................................... 108

A.4.1 Unshielded 1 MW Diesel Spray Fire..................................................................................................... 108 A.4.2 Shielded 1 MW Diesel Spray Fire ......................................................................................................... 108 A.4.3 Shielded 10.8 ft2 (1 m2) Diesel Pool Fire............................................................................................... 109 A.4.4 Shielded 2 MW Diesel Spray Fire, System Performance under Limited Natural Ventilation............... 109 A.4.5 Additional Fire Tests ............................................................................................................................. 109

Figure A-1. Test Enclosure and Machinery Mockup Steel Table................................................................... 110 Figure A-2. Fire Source Configuration and Instrumentation for Shielded Spray Fire Testing....................... 111 Figure A-3. Fire Source Configuration and Instrumentation for Shielded Pool Fire Testing......................... 112

APPENDIX B: Fire Tests for Water Mist Systems for the Protection of Special Hazard Machinery Spaces with Volumes not Exceeding 2825 ft3 (80 m3)............................................................................................................. 113

B.1 Test Enclosure (see Figure B-1) ................................................................................................................... 113 B.2 Special Hazard Machinery Equipment Mockup ........................................................................................... 113 B.3 Instrumentation and Test Equipment Requirements ..................................................................................... 113 B.4 Fire Tests ...................................................................................................................................................... 115

B.4.1 Unshielded 1 MW Heptane Spray Fire.................................................................................................. 115 B.4.2 Shielded 1 MW Heptane Spray Fire ...................................................................................................... 115 B.4.3 Shielded 10.8 ft2 (1 m2) Heptane Pool Fire............................................................................................ 116 B.4.4 Shielded 2 MW Heptane Spray Fire, System Performance Under Limited Natural Ventilation........... 116 B.4.5 Additional Fire Tests ............................................................................................................................. 116

Figure B-1. Test Enclosure and Machinery Mockup Steel Table................................................................... 117 Figure B-2. Fire Source Configuration and Instrumentation for Shielded Spray Fire Testing ....................... 118 Figure B-3. Fire Source Configuration and Instrumentation for Shielded Pool Fire Testing ......................... 119

APPENDIX C: Fire Tests for Water Mist Systems for the Protection of Combustion Turbines with Volumes not Exceeding 2825 ft3 (80 m3) .................................................................................................................................. 120

C.1 Test Enclosure (see Figure C-1) ................................................................................................................... 120

C.2 Combustion Turbine Mockup .......................................................................................................................120 C.3 Instrumentation and Test Equipment Requirements .....................................................................................121 C.4 Fire Tests.......................................................................................................................................................122

C.4.1 Unshielded 1 MW Diesel Spray Fire .....................................................................................................123 C.4.2 Shielded 1 MW Diesel Spray Fire .........................................................................................................123 C.4.3 Shielded 10.8 ft2 (1 m2) Diesel Pool Fire ...............................................................................................123 C.4.4 Shielded 2 MW Diesel Spray Fire, System Performance under Limited Natural Ventilation ...............124 C.4.5 Spray Cooling (No Fire) ........................................................................................................................124 C.4.6 Saturated Insulation Mat and Spray Fire (Optional Test) ......................................................................125 C.4.7 Large Saturated Insulation Mat (Optional Test) ....................................................................................125 C.4.8 Additional Fire Tests..............................................................................................................................126

Figure C-1. Test Enclosure and Combustion Turbine Simulator Steel Plate ..................................................127 Figure C-2. Fire Source Configuration and Instrumentation for Shielded Spray Fire Testing .......................128 Figure C-3. Fire Source Configuration and Instrumentation for Shielded Pool Fire Testing .........................129 Figure C-4. Fire Source Configuration for Spray Cooling (No Fire) Testing.................................................130 Figure C-5. Detail of Embedded Thermocouple for Spray Cooling Test .......................................................131

APPENDIX D: Fire Tests for Water Mist Systems for the Protection of Machinery Spaces with Volumes not Exceeding 9175 ft3 (260 m3) ................................................................................................................................132

D.1 Test Enclosure (see Figure D-1)....................................................................................................................132 D.2 Machinery Equipment Mockup.....................................................................................................................132 D.3 Instrumentation and Test Equipment Requirements .....................................................................................133 D.4 Fire Tests.......................................................................................................................................................134

D.4.1 Unshielded 1 MW Diesel Spray Fire .....................................................................................................134 D.4.2 Shielded 1 MW Diesel Spray Fire .........................................................................................................135 D.4.3 Shielded 10.8 ft2 (1 m2) Diesel Pool Fire ...............................................................................................135 D.4.4 Shielded 2 MW Diesel Spray Fire, System Performance under Limited Natural Ventilation ...............135 D.4.5 Shielded 2 MW Diesel Spray Fire, System Performance at Smaller Enclosure Volumes .....................136 D.4.6 Additional Fire Tests..............................................................................................................................136

Figure D-1. Test Enclosure and Machinery Mockup Steel Plate ....................................................................137 Figure D-2. Fire Source Configuration and Instrumentation for Shielded Spray Fire Testing .......................138 Figure D-3. Fire Source Configuration and Instrumentation for Shielded Pool Fire Testing .........................139

APPENDIX E: Fire Tests for Water Mist Systems for the Protection of Special Hazard Machinery Spaces with Volumes not Exceeding 9175 ft3 (260 m3)...........................................................................................................140

E.1 Test Enclosure (see Figure E-1) ....................................................................................................................140 E.2 Special Hazard Machinery Equipment Mockup............................................................................................140 E.3 Instrumentation and Test Equipment Requirements .....................................................................................141 E.4 Fire Tests.......................................................................................................................................................142

E.4.1 Unshielded 1 MW Heptane Spray Fire ..................................................................................................142 E.4.2 Shielded 1 MW Heptane Spray Fire ......................................................................................................143 E.4.3 Shielded 10.8 ft2 (1 m2) Heptane Pool Fire............................................................................................143 E.4.4 Shielded 2 MW Heptane Spray Fire, System Performance Under Limited Natural Ventilation ...........143 E.4.5 Shielded 2 MW Heptane Spray Fire, System Performance at Smaller Enclosure Volumes ..................144 E.4.6 Additional Fire Tests..............................................................................................................................144

Figure E-1. Test Enclosure and Machinery Mockup Steel Plate ....................................................................145 Figure E-2. Fire Source Configuration and Instrumentation for Shielded Spray Fire Testing........................146 Figure E-3. Fire Source Configuration and Instrumentation for Shielded Pool Fire Testing..........................147

APPENDIX F: Fire Tests for Water Mist Systems for the Protection of Combustion Turbines with Volumes not Exceeding 9175 ft3 (260 m3) ................................................................................................................................148

F.1 Test Enclosure (see Figure F-1) ....................................................................................................................148 F.2 Combustion Turbine Mockup .......................................................................................................................148 F.3 Instrumentation and Test Equipment Requirements .....................................................................................149 F.4 Fire Tests.......................................................................................................................................................150

F.4.1 Unshielded 1 MW Diesel Spray Fire .....................................................................................................151 F.4.2 Shielded 1 MW Diesel Spray Fire .........................................................................................................151

F.4.3 Shielded 10.8 ft2 (1 m2) Diesel Pool Fire............................................................................................... 151 F.4.4 Shielded 2 MW Diesel Spray Fire, System Performance under Limited Natural Ventilation............... 152 F.4.5 Shielded 2 MW Diesel Spray Fire, System Performance at Smaller Enclosure Volumes..................... 152 F.4.6 Spray Cooling (No Fire) ........................................................................................................................ 153 F.4.7 Saturated Insulation Mat and Spray Fire (Optional Test) ...................................................................... 154 F.4.8 Large Saturated Insulation Mat (Optional Test) .................................................................................... 154 F.4.9 Additional Fire Tests ............................................................................................................................. 154

Figure F-1. Test Enclosure and Combustion Turbine Simulator Steel Plate .................................................. 155 Figure F-2. Fire Source Configuration and Instrumentation for Shielded Spray Fire Testing........................ 156 Figure F-3. Fire Source Configuration and Instrumentation for Shielded Pool Fire Testing.......................... 157 Figure F-4. Fire Source Configuration for Spray Cooling (No Fire) Testing ................................................. 158 Figure F-5. Fire Source Configuration for Spray Cooling (No Fire) Testing ................................................. 159

APPENDIX G: Fire Tests for Water Mist Systems for the Protection of Machinery Spaces and Special Hazard Machinery Spaces with Volumes Exceeding 9175 ft3 (260 m3) .......................................................................... 160

G.1 Test Enclosure (see Figure G-1) ................................................................................................................... 160 G.2 Machinery Mockup Unit (see Figures G-2 and G-3) .................................................................................... 160 G.3 Instrumentation and Test Equipment Requirements ..................................................................................... 160 G.4 Fire Tests ...................................................................................................................................................... 162

G.4.1 Low Pressure, Exposed, Diesel Spray Fire............................................................................................ 162 G.4.2 Low Pressure, Angled, Diesel Spray Fire.............................................................................................. 163 G.4.3 Low Pressure, Concealed, Diesel Spray Fire......................................................................................... 163 G.4.4 High Pressure, Exposed, Diesel Spray................................................................................................... 163 G.4.5 Low Pressure-Low Flow, Concealed, Diesel Spray and Pool Fires....................................................... 164 G.4.6 Concealed, Heptane Pool Fire ............................................................................................................... 164 G.4.7 Flowing Fire .......................................................................................................................................... 164 G.4.8 Wood Crib and Heptane Pool Fire......................................................................................................... 165 G.4.9 Additional Fire Tests ............................................................................................................................. 165

Figure G-1. Test Enclosure............................................................................................................................. 166 Figure G-2. Machinery Mockup Unit ............................................................................................................. 167 Figure G-3. Machinery Mockup Unit (continued).......................................................................................... 168 Figure G-4. Fire Test G-3-2, Position of Fuel Spray Nozzle and Obstruction Rod........................................ 169

APPENDIX H: Fire Tests for Water Mist Systems for the Protection of Combustion Turbines with Volumes Exceeding 9175 ft3 (260 m3) ................................................................................................................................ 170

H.1 Test Enclosure (see Figure H-1) ................................................................................................................... 170 H.2 Combustion Turbine and Engine Mockup Unit (see Figures H-2 and H-3) ................................................. 170 H.3 Combustion Turbine Spray Cooling Mockup Unit (see Figures H-5 and H-6) ............................................ 170 H.4 Instrumentation and Test Equipment Requirements ..................................................................................... 171 H.5 Fire Tests ...................................................................................................................................................... 173

H.5.1 Low Pressure, Exposed, Diesel Spray Fire............................................................................................ 173 H.5.2 Low Pressure, Angled, Diesel Spray Fire.............................................................................................. 173 H.5.3 Low Pressure, Concealed, Diesel Spray Fire......................................................................................... 174 H.5.4 High Pressure, Exposed, Diesel Spray................................................................................................... 174 H.5.5 Low Pressure-Low Flow, Concealed, Diesel Spray and Pool Fires....................................................... 174 H.5.6 Concealed, Heptane Pool Fire ............................................................................................................... 175 H.5.7 Flowing Fire .......................................................................................................................................... 175 H.5.8 Wood Crib and Heptane Pool Fire......................................................................................................... 175 H.5.9 Saturated Insulation Mat and Spray Fire (Optional Test) ...................................................................... 176 H.5.10 Saturated Insulation Mat Fire (Optional Test) ....................................................................................... 176 H.5.11 Spray Cooling (No Fire) ........................................................................................................................ 177 H.5.12 Additional Fire Tests ............................................................................................................................. 177

Figure H-1. Machinery and Combustion Turbine Test Enclosure.................................................................. 178 Figure H-2. Machinery and Combustion Turbine Mockup Unit .................................................................... 179 Figure H-3. Machinery and Combustion Turbine Mockup Unit (continued) ................................................. 180 Figure H-4. Fire Test H-3-2, Position of Fuel Spray Nozzle and Obstruction Rod........................................ 181 Figure H-5. Fire Source Configuration for Spray Cooling (No Fire) Testing ................................................ 182 Figure H-6. Detail of Embedded Thermocouple for Spray Cooling Test....................................................... 183

APPENDIX I: Fire Tests for Water Mist Systems for the Protection of Light Hazard Occupancies............................184 I.1 General Testing Requirements ......................................................................................................................184 I.2 Test Room Configurations ............................................................................................................................185

I.2.1 Test Room I-1 - Small Compartment (see Figure I-1) ...........................................................................185 I.2.2 Test Room I-2 - Large Compartment (see Figures I-3 and I-4) .............................................................185

Table I.2.2. Required Burning Characteristics of Douglas Fir Three-Ply Paneling........................................186 I.2.3 Test Room I-3 - Open Space..................................................................................................................187

I.3 Fuel Package Configurations ........................................................................................................................187 I.3.1 Fuel Package I-1 Bunk Beds (see Figure I-2) ........................................................................................187

Table I.3.1 Required Burning Characteristics of Foam Mattress Material ..................................................188 I.3.2 Fuel Package I-2 Corner Crib and Simulated Furniture (see Figures I-3, I-4, and I-5)..........................188

Table I.3.2 Required Burning Characteristics of Polyether Foam ...............................................................189 I.3.3 Fuel Package I-3 Sofas (see Figure I-6) .................................................................................................189

Table I.3.3 Required Burning Characteristics of Foam Mattress Material ..................................................190 I.4 Fire Tests.......................................................................................................................................................190

I.4.1 Small Compartment with Fuel Package I-1 (Bunk Beds) ......................................................................190 I.4.2 Large Compartment with Fuel Package I-2 (Corner Crib).....................................................................191 I.4.3 Open Space with Fuel Package I-3 (Sofas) - Under One Nozzle...........................................................191 I.4.4 Open Space with Fuel Package I-3 (Sofas) - Between Two Nozzles.....................................................191 I.4.5 Open Space with Fuel Package I-3 (Sofas) - Between Four Nozzles ....................................................191

Figure I-1. Small Compartment Test Room....................................................................................................193 Figure I-2. Fuel Package I-1 Bunk Beds.........................................................................................................194 Figure I-3. Large Compartment Test Room and Simulated Fuel Package I-2 Locations (Pendent and Upright

Nozzles) ...................................................................................................................................................195 Figure I-4. Large Compartment Test Room and Simulated Fuel Package I-2 Locations (Sidewall Nozzles) 196 Figure I-5. Fuel Package I-2 Corner Crib and Simulated Furniture................................................................197 Figure I-6. (Fuel Package I-3 Sofas) ...............................................................................................................198

APPENDIX J: Fire Tests for Water Mist Systems for the Protection of Wet Benches and Other Similar Processing Equipment ............................................................................................................................................................199

J.1 Test Enclosure (see Figures J-1 through J-3) ................................................................................................199 J.2 Wet Bench Mockup Unit (see Figures J-4 through J-9)................................................................................199 J.3 Instrumentation and Test Equipment Requirements .....................................................................................200 J.4 Ventilated Subsurface (Plenum) Fire Tests (See Figures J-7 and J-8) ..........................................................201

J.4.1 Nominal 4 in. (102 mm) Diameter Polypropylene Pool Fire .................................................................201 J.4.2 Nominal 6 in. (152 mm) Diameter Polypropylene Pool Fire .................................................................201 J.4.3 Nominal 8 in. (203 mm) Diameter Polypropylene Pool Fire .................................................................202 J.4.4 Nominal 10 in. (254 mm) Diameter Polypropylene Pool Fire ...............................................................202 J.4.5 Nominal 12 in. (305 mm) Diameter Polypropylene Pool Fire ...............................................................202 J.4.6 Flammable Liquid Pool Fires.................................................................................................................203

Table J.4.6 Flammable Liquid Pool Fuel Properties.......................................................................................203 J.4.7 Polypropylene Pool Fire Utilizing a Single Nozzle in a Ventilated Subsurface Space..........................203 J.4.8 Flammable Liquid Pool Fires Utilizing a Single Nozzle in a Ventilated Subsurface Space ..................204 J.4.9 Other Ventilated Subsurface Fire Tests .................................................................................................204

J.5 Wet Bench Working Surface Fire Tests (See Figure J-9) .............................................................................204 J.5.1 Nominal 4 in. (102 mm) Diameter Polypropylene Pool Fire .................................................................205 J.5.2 Nominal 6 in. (152 mm) Diameter Polypropylene Pool Fire .................................................................205 J.5.3 Nominal 8 in. (203 mm) Diameter Polypropylene Pool Fire .................................................................205 J.5.4 Nominal 10 in. (254 mm) Diameter Polypropylene Pool Fire ...............................................................206 J.5.5 Nominal 12 in. (305 mm) Diameter Polypropylene Pool Fire ...............................................................206 J.5.6 Flammable Liquid Pool Fires.................................................................................................................206

Table J.5.6 Flammable Liquid Pool Fuel Properties.......................................................................................207 J.5.7 Splashing Test........................................................................................................................................207 J.5.8 Other Working Surface Fire Tests .........................................................................................................207

J.6 Unventilated Spaces Fire Tests .....................................................................................................................207 J.6.1 Polypropylene Pool Fire Utilizing a Single Nozzle in an Unventilated Space.......................................207 J.6.2 Flammable Liquid Pool Fire Utilizing a Single Nozzle in an Unventilated Space ................................208

J.6.3 Other Unventilated Space Fire Tests ..................................................................................................... 208 Figure J-1. Clean Room Simulation Facility - Side View .............................................................................. 209 Figure J-2. Clean Room Simulation Facility - Top View............................................................................... 210 Figure J-3. Clean Room Simulation Facility - Front View............................................................................. 211 Figure J-4. Wet Bench Test Apparatus - Side View....................................................................................... 212 Figure J-5. Wet Bench Test Apparatus - Front View ..................................................................................... 213 Figure J-6. Wet Bench Test Apparatus - Top View........................................................................................ 214 Figure J-7. Wet Bench Test Apparatus for Plenum Fire Subsurface Testing with Obstructions - Front View215 Figure J-8. Wet Bench Test Apparatus for Plenum Fire Subsurface Testing without Obstructions - Front

View ........................................................................................................................................................ 216 Figure J-9. Wet Bench Test Apparatus for Surface Area Fire Testing- Front View....................................... 217 Figure J-10. Polypropylene Pool Fire for Wet Bench Fire Testing ................................................................ 218

APPENDIX K: Fire Tests for Water Mist Systems for the Protection of Local Applications...................................... 219 K.1 General Testing Requirements...................................................................................................................... 219 K.2 Instrumentation and Test Equipment Requirements ..................................................................................... 219 K.3 Fire Scenarios and Test Configurations ........................................................................................................ 220

K.3.1 Square Pool Fires................................................................................................................................... 220 K.3.2 Channel Pool Fires................................................................................................................................. 221 K.3.3 Spray Fires............................................................................................................................................. 222 K.3.4 6.6 ft by 6.6 ft (2 m by 2 m) Square Pool Fire Combined with a 6 MW Spray Fire.............................. 223 K.3.5 Obstructed 9.8 by 9.8 ft (3 by 3 m) Square Pool Fire ............................................................................ 223 K.3.6 Offset 3.3 by 3.3 ft (1 by 1 m) Square Pool Fire.................................................................................... 224 K.3.7 6 MW Spray Fire with an External Ignition Source .............................................................................. 225 K.3.8 Other ...................................................................................................................................................... 225

Figure K-1. Pool Fires for Fire Scenario K.3.1............................................................................................... 226 Figure K-2. Channel Pool Fire for Fire Scenario K.3.2.................................................................................. 227 Figure K-3. Spray Fires for Fire Scenario K.3.3............................................................................................. 228 Figure K-4. Pool and Spray Fire for Fire Scenario K.3.4.A ........................................................................... 229 Figure K-5. Pool and Spray Fire for Fire Scenario K.3.4.B ........................................................................... 230 Figure K-6. Pool and Spray Fire for Fire Scenario K.3.4.C ........................................................................... 231 Figure K-7. Pool and Spray Fire for Fire Scenario K.3.4.D ........................................................................... 232 Figure K-8. Pool and Spray Fire for Fire Scenario K.3.4.E............................................................................ 233 Figure K-9. Shielded Pool Fire for Fire Scenario K.3.5 ................................................................................. 234 Figure K-10. Spray Fire Arrangement for Fire Scenario K.3.6 ...................................................................... 235

APPENDIX L: Fire Tests for Water Mist Systems for the Protection of Industrial Oil Cookers ................................. 236 L.1 General Testing Requirements...................................................................................................................... 236 L.2 Industrial Oil Cooker Mockups .................................................................................................................... 237 L.3 Instrumentation and Test Equipment Requirements ..................................................................................... 238 L.4 Approval Criteria .......................................................................................................................................... 238 L.5 Fire Tests ...................................................................................................................................................... 239

L.5.1 Hood Up Position with Mockup A ........................................................................................................ 239 L.5.2 Hood Down Position with Mockup A ................................................................................................... 239 L.5.3 Hood Up Position with Mockup B ........................................................................................................ 240 L.5.4 Hood Down Position with Mockup B.................................................................................................... 240 L.5.5 Hood Up Position with Mockup C ........................................................................................................ 240 L.5.6 Hood Down Position with Mockup C.................................................................................................... 240 L.5.7 Other ...................................................................................................................................................... 240

L.6 Extrapolation of Test Data ............................................................................................................................ 240 L.7 Larger Protection Widths.............................................................................................................................. 241

Figure L-1. Schematic Figure of Mockup A (Pan and Hood)......................................................................... 242 Figure L-2. Schematic Figure of Mockup B (Pan and Hood)......................................................................... 243 Figure L-3. Schematic Figure of Mockup C (Pan and Hood)......................................................................... 244 Figure L-4. Schematic of Hood Up and Down Positions ............................................................................... 245

APPENDIX M: Fire Tests for Water Mist Systems for the Protection of Computer Room Sub Floors....................... 246 M.1 General Testing Requirements...................................................................................................................... 246

M.2 Instrumentation and Test Equipment Requirements .....................................................................................246 M.3 Test Enclosure...............................................................................................................................................247 M.4 Fire Tests Configurations..............................................................................................................................248

M.4.1 Telltale Fire Test Singular Module .....................................................................................................248 M.4.2 Cable Fire Test.......................................................................................................................................248

Table M.4.2 Required Burning Characteristics of Cable .............................................................................249 M.4.3 Moisture Concentration Test..................................................................................................................250 M.4.4 Telltale Fire Test Two Modules..........................................................................................................250

M.5 Extrapolation of Test Data ............................................................................................................................251 Figure M-1. A Typical Heptane Cup used for Telltale Fire Tests...................................................................252 Figure M-2. Cable Fire Fuel Load ..................................................................................................................253 Figure M-3. Cable Fire ...................................................................................................................................254 Figure M-4. Telltale Fire Locations................................................................................................................255 Figure M-5. Schematic Cable Fire Fuel..........................................................................................................256

APPENDIX N: Fire Tests for Water Mist Systems for the Protection of Continuous Wood Board Presses ................257 N.1 General Testing Requirements ......................................................................................................................257 N.2 Continuous Wood Board Press Mockups (Figure N-1) ................................................................................257

N.2.1 Press Pocket Space Mockup (Figure N-2) .............................................................................................257 N.2.2 Heat Tunnel Mockup (Figures N-3 and N-4).........................................................................................258

N.3 Instrumentation and Test Equipment Requirements .....................................................................................258 N.4 Fire Tests.......................................................................................................................................................259

N.4.1 Press Pocket Pool Fire ...........................................................................................................................259 N.4.2 Unobstructed Press Pocket Spray Fire (Angled Upward) ......................................................................260 N.4.3 Unobstructed Press Pocket Spray Fire (Angled Downward) .................................................................260 N.4.4 Obstructed Press Pocket Spray Fire (Angled Upward) ..........................................................................261 N.4.5 Heat Tunnel Channel Fire ......................................................................................................................261 N.4.6 Heat Tunnel Belt Cooling (No Fire) ......................................................................................................262

N.5 Extrapolation of Test Data ............................................................................................................................263 Figure N-1. Schematic Illustration of a Continuous Board Press ...................................................................264 Figure N-2. Press Pocket Space Mockup........................................................................................................265 Figure N-3. Press Heat Tunnel Mockup .........................................................................................................266 Figure N-4. Thermocouple Layout on the Stainless Steel Belt Installed in the Heat Tunnel Mockup ...........267 Figure N-5. Test Setup for the 6MW Spray Fire Scenario in the Press Pocket Space ....................................268 Figure N-6. Test Setup for the Obstructed 6MW Spray Fire Scenario in the Press Pocket Space..................269

APPENDIX O: Other Occupancies which FM Global has an Interest in Protecting with Water Mist Systems...........270 O.1 General Testing Requirements ......................................................................................................................270

APPENDIX P: Units of Measurement ..........................................................................................................................271 APPENDIX Q: Tolerances............................................................................................................................................273 APPENDIX R: Tolerance Limit Calculations...............................................................................................................274

Table Q1. Factors for One-Sided Tolerance Limits for Normal Distributions (99 Percent of Samples)......274 APPENDIX S: FM Approvals Certification Marks ......................................................................................................275 APPENDIX T: Figures T-1 through T-6.......................................................................................................................277

Figure T-1. Hang-Up of Operating Parts ........................................................................................................277 Figure T-2. Test Apparatus for Measuring Nominal K-Factors < 8.0 gal/min/psi (11.54 L/min/bar) ............278 Figure T-3. Impact Test Apparatus .................................................................................................................279 Figure T-4. Plunge Tunnel Test Plate (For Sensitivity - RTI Test).................................................................280 Figure T-5. Bulb Crush Inserts For Strength of Element Test ........................................................................281 Figure T-6. Test Apparatus For Fatigue Test..................................................................................................282

APPENDIX U: Sample Approval Guide Listings.........................................................................................................283

March 2009 5560

FM APPROVALS 1

1. INTRODUCTION 1.1 Purpose

1.1.1 This standard states Approval criteria for water mist systems for use as fire control and/or extinguishing systems.

1.1.2 Approval criteria may include, but are not limited to, component, system and fire testing

performance requirements, marking requirements, examination of manufacturing facility(ies), audit of quality assurance procedures, and a follow-up program.

1.2 Scope

1.2.1 This standard encompasses the design and performance requirements for water mist systems for use as fire control and/or extinguishing systems designed and installed per FM Global Property Loss Prevention Data Sheets. Approval is limited to use in the occupancies described Sections 1.2.3.1 through 1.2.3.14. Due to the current state of water mist system technology, a comprehensive absolute standard for the testing of water mist system components is not possible. Since each water mist system is unique in its operation and design, the component testing of the water mist system shall be performed on a case-by-case basis. The component testing section is intended to be used as a guideline for the manufacturer as to the scope of the test program that can be expected. Upon request for a program, and appropriate system documentation, FM Approvals will prepare a customized evaluation program for the specific water mist system. While customization of the component testing is necessary, the fire test protocols are generic and required for all water mist systems. The manufacturers design calculations, stated performance requirements, as well as component functionality and reliability will be verified.

1.2.2 This standard is intended to verify that the product described will meet stated conditions of

performance, safety and quality useful to the ends of property conservation.

1.2.3 Since water mist is an evolving technology, FM Approvals has determined that water mist systems shall be FM Approved for the protection of specific applications and specific protected area volumes. Extrapolation beyond the volumes which were tested is not permitted except where explicitly noted. The scope of this standard encompasses the following occupancy protection applications:

1.2.3.1 Protection of machinery spaces with volumes not exceeding 2825 ft3 (80 m3), Appendix A.

This application includes rooms with machinery such as oil pumps, oil tanks, fuel filters, generators, transformer vaults, gear boxes, drive shafts, lubrication skids, diesel engine driven generators, and other similar machinery using fuel and/or lubrication fluids with volatilities less than or equal to light diesel. All hazards included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, time to shut down process equipment, or 10 minutes, whichever is greater.

1.2.3.2 Protection of special hazard machinery spaces with volumes not exceeding 2825 ft3

(80 m3), Appendix B. This application includes rooms with machinery such as internal combustion engines or other equipment using fuel and/or lubrication fluids with volatilities less than or equal to heptane, and incidental use or storage of limited quantities of flammable liquids of not more than two 55 gal (208 L) drums. All hazards included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, time to shut down process equipment, or 10 minutes, whichever is greater.

5560 March 2009

2 FM APPROVALS

1.2.3.3 Protection of combustion turbines in enclosures with volumes not exceeding 2825 ft3 (80 m3), Appendix C. Combustion turbines included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, turbine rundown time (including the time that the turbine surfaces are above the auto-ignition temperature of the lubricating fluid), the time to shut down process equipment, or 10 minutes, whichever is greater. Consultation with FM Global Property Loss Prevention Data Sheet Number 7-79, Fire Protection for Combustion Turbine Installations, is required for installation of these systems.

1.2.3.4 Protection of machinery spaces with volumes not exceeding 9175 ft3 (260 m3), Appendix

D. This application includes rooms with machinery such as oil pumps, oil tanks, fuel filters, generators, transformer vaults, gear boxes, drive shafts, lubrication skids, diesel engine driven generators, and other similar machinery using fuel and/or lubrication fluids with volatilities less than or equal to light diesel. All hazards included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, the time to shut down process equipment, or 10 minutes, whichever is greater.

1.2.3.5 Protection of special hazard machinery spaces with volumes not exceeding 9175 ft3

(260 m3), Appendix E. This application includes rooms with machinery such as internal combustion engines or other equipment using fuel and/or lubrication fluids with volatilities less than or equal to heptane, and incidental use or storage of limited quantities of flammable liquids of not more than two 55 gal (208 L) drums. All hazards included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, the time to shut down process equipment, or 10 minutes, whichever is greater.

1.2.3.6 Protection of combustion turbines in enclosures with volumes not exceeding 9175 ft3

(260 m3), Appendix F. Combustion turbines included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, turbine rundown time (including the time that the turbine surfaces are above the auto-ignition temperature of the lubricating fluid), the time to shut down process equipment, or 10 minutes, whichever is greater. Consultation with FM Global Property Loss Prevention Data Sheet Number 7-79, Fire Protection for Combustion Turbine Installations, is required for installation of these systems.

1.2.3.7 Protection of machinery spaces and special hazard machinery spaces with volumes

exceeding 9175 ft3 (260 m3), Appendix G. The machinery space application includes rooms with machinery such as oil pumps, oil tanks, fuel filters, generators, transformer vaults, gear boxes, drive shafts, lubrication skids, diesel engine driven generators, and other similar machinery using fuel and/or lubrication fluids with volatilities less than or equal to light diesel. The special hazard machinery space application includes rooms with machinery such as internal combustion engines or other equipment using fuel and/or lubrication fluids with volatilities less than or equal to heptane, and incidental use or storage of limited quantities of flammable liquids of not more than two 55 gal (208 L) drums. All hazards included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, the time to shut down process equipment, or 10 minutes, whichever is greater. For primary protection consideration, see Section 1.9, Definitions, Primary Protection, and consult the FM Global Property Loss Prevention Data Sheet for the recommended protection of the specific hazard in the applicable occupancy.

1.2.3.8 Protection of combustion turbines in enclosures with volumes exceeding 9175 ft3 (260 m3),

Appendix H. Combustion turbines included under the scope of this total flooding application shall be protected for a minimum of twice the longest time to extinguish the test fires, the turbine rundown time (including the time that the turbine surfaces are above the auto-ignition temperature of the lubricating fluid), the time to shut down process

March 2009 5560

FM APPROVALS 3

equipment, or 10 minutes, whichever is greater. Consultation with FM Global Property Loss Prevention Data Sheet Number 7-79, Fire Protection for Combustion Turbine Installations, is required for installation of these systems. For primary protection consideration, see Section 1.9, Definitions, Primary Protection.

1.2.3.9 Protection of light hazard occupancies, Appendix I. Typical light hazard occupancies

within the scope of this application are defined in FM Global Property Loss Prevention Data Sheet Number 4-2, Water Mist Systems. The occupancies will be limited to non-storage and non-manufacturing areas such as residential, offices, data processing areas without open storage of information media, meeting rooms, hotels, museums (exhibit areas), restaurant seating areas, institutions, and schools. The applications will be