BS EN 14972-1:2020:2021 Edition
$215.11
Fixed firefighting systems. Water mist systems – Design, installation, inspection and maintenance
| Published By | Publication Date | Number of Pages |
| BSI | 2021 | 118 |
This document specifies requirements and gives recommendations for the design, installation, inspection and maintenance of all types of fixed land based water mist systems.
This document is intended to apply to water mist automatic nozzle systems and water mist deluge systems supplied by stand alone or pumped systems.
The document covers only applications and occupancies which are covered by the fire test protocols of the EN 14972 series.
Aspects of water mist associated with explosion protection and/or use within vehicles are not covered by this document.
This document does not cover all legislative requirements. In certain countries specific national regulations apply and take precedence over this document. Users of this document are advised to inform themselves of the applicability or non-applicability for this document by their national responsible authorities.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 14 | 1 Scope 2 Normative references |
| 15 | 3 Terms, definitions and abbreviations 3.1 Terms and definitions |
| 22 | 3.2 Abbreviations 4 Design 4.1 Design principal 4.1.1 General 4.1.2 General requirement 4.1.3 Full scale fire testing procedures 4.1.3.1 General 4.1.3.2 Test protocols |
| 23 | 4.2 Design, installation, operation and maintenance manual 4.2.1 General 4.2.2 Content of the DIOM manual |
| 25 | 4.3 Water mist systems using gas for their operation 4.4 Use of additives 4.5 Design parameters 4.6 Water and gas supply 4.6.1 Pumped systems requirements 4.6.2 Self-contained systems requirements 4.7 Compartment protection 4.7.1 General 4.7.2 Compartment |
| 26 | 4.7.3 Fire hazard 4.7.4 Design requirements 4.8 Requirements for different types of water mist deluge systems 4.8.1 Local application systems 4.8.2 Local application systems with multiple hazards 4.8.3 Volume protection water mist systems 4.8.4 Zoned protection systems 4.8.5 Activation and control 4.8.5.1 Activation 4.8.5.2 Fire detection and fire alarm system and activation system |
| 27 | 4.8.5.3 Intermittent systems 4.9 Design of water mist automatic nozzle systems 4.9.1 Extent of protection 4.9.2 Permitted exceptions within a building 4.9.3 Material reaction 4.9.4 System design 4.9.4.1 General |
| 28 | 4.9.4.2 Hydraulic calculations 4.9.4.3 Area of operation |
| 30 | 4.9.4.4 Requirements for different types of automatic nozzle water mist systems |
| 32 | 4.9.5 Nozzle selection and positioning 4.9.5.1 Nominal operating temperature for automatic nozzles 4.9.5.2 Nozzle selection 4.9.5.3 Nozzle positioning 4.9.6 Alarm device 4.9.7 Test connection 4.9.8 Air velocity and openings |
| 33 | 4.10 Design of water mist deluge system 4.10.1 Nozzle selection and positioning 4.10.1.1 Nozzle selection 4.10.1.2 Nozzle positioning 4.10.2 Air velocity and openings 4.10.3 Automatic shut-down 4.10.3.1 Ventilation in the protected area 4.10.3.2 Fuel and other combustibles used in the protected area 4.10.3.3 Power supply to equipment in the protected area 4.11 Fire detection and fire alarm systems activating the water mist system 4.11.1 General requirements 4.11.2 Fire detection and fire alarm systems continuity |
| 34 | 4.11.3 Avoiding false alarms by water mist discharge 4.11.4 Manual activation 4.11.5 Electrical detection and activation 4.11.5.1 General 4.11.5.2 Electrical equipment 4.11.5.3 Fire detection and fire alarm systems control panel 4.11.5.4 Fire detection and fire alarm systems power supply 4.11.5.5 Fire detection and fire alarm system power supply isolating switch 4.11.5.6 Alarm and fault indications |
| 35 | 4.11.6 Non-electrical detection 4.11.6.1 General 4.11.6.2 Pneumatic fire detection and fire alarm systems 4.11.6.3 Pneumatic or hydraulic system supervision 4.12 Hydraulic and pneumatic calculations 4.13 Water, propellant and atomizing gas supply design 4.13.1 General 4.13.2 Connection to public or town mains |
| 36 | 4.13.3 Flow requirement 4.13.3.1 Flow requirement for water mist automatic nozzle systems 4.13.3.2 Flow requirement for deluge water mist systems 4.13.4 Maximum and minimum water pressure 4.13.5 Discharge operating time |
| 38 | 4.13.6 Type of water supply 4.13.6.1 Acceptable sources of water supply |
| 39 | 4.13.6.2 Acceptable propellant/atomizing gas supply systems 4.13.7 Availability 4.13.7.1 General |
| 40 | 4.13.7.2 Reduced capacity water reservoir |
| 42 | 4.13.7.3 Frost protection |
| 43 | 4.13.8 Housing of equipment for water supplies 4.13.8.1 Equipment housing 4.13.8.2 Fire protection 4.13.8.3 Temperature 4.13.8.4 Ventilation 5 Installation 5.1 General 5.1.1 DIOM manual 5.1.2 Electrical safety |
| 44 | 5.1.3 High Voltage live electrical equipment 5.1.4 Electrical clearances 5.2 Nozzle 5.2.1 General 5.2.1.1 Nozzle installation 5.2.1.2 Installation height of nozzles |
| 45 | 5.2.1.3 Nozzle spacing 5.2.1.4 Nozzle protection 5.2.1.5 Nozzle Escutcheons and cover plates 5.2.2 Automatic nozzle 5.2.2.1 Distance of nozzle from the ceiling 5.2.2.2 Distance of nozzles from walls 5.2.2.3 Ceiling slope 5.2.2.4 Obstruction 5.2.3 Open nozzle 5.2.3.1 Distance from the hazard |
| 46 | 5.2.3.2 Obstruction 5.3 Pipe 5.3.1 General 5.3.2 Protection against mechanical damages 5.3.3 Protection against corrosion 5.3.4 Protection in seismic areas 5.3.5 Protection against freezing for wet pipes 5.3.6 Accessibility of the pipe work 5.3.7 Pipe bending 5.3.7.1 General 5.3.7.2 Pipe bending tools |
| 47 | 5.3.8 Water supply pipes 5.3.9 Pipe support 5.3.9.1 General 5.3.9.2 Pipe support spacing |
| 48 | 5.3.9.3 Pipe support positioning 5.3.10 Drainage 5.4 Gas and water containers (where provided) 5.4.1 General 5.4.2 Location 5.4.3 Accessibility 5.4.4 Fixing 5.4.5 Manifolds |
| 49 | 5.4.6 Temperature 5.5 Strainers and filters 5.5.1 Strainers 5.5.2 Nozzle filter 5.5.3 System filters 5.6 Valves 5.6.1 General 5.6.2 Identifications 5.6.3 Accessibility 5.6.4 Securing and monitoring valves 5.6.5 Shut-off valves |
| 50 | 5.6.6 Control valves 5.6.7 Check and non-return valves 5.7 Pressure gauges 5.8 Test connection 5.8.1 Test connection for automatic water mist systems 5.8.2 Test connection for water mist deluge system 5.9 Electrical installation 5.9.1 Electrical power supply 5.9.2 Fire detection and fire alarm system 5.10 System monitoring and alarms 5.10.1 General |
| 51 | 5.10.2 Alarms 5.10.2.1 System activation 5.10.2.2 Other alarms 5.10.2.3 System failure 5.10.3 Remote signalling |
| 52 | 5.11 Water mist system supply, including additives 5.11.1 General 5.11.2 Water quality 5.11.2.1 Water source 5.11.2.2 Maximum temperature of water 5.11.3 Additives 5.11.3.1 General 5.11.3.2 Identification 5.11.3.3 Adversely effects of additives 5.11.4 Water supply 5.11.4.1 Self-contained system |
| 53 | 5.11.4.2 Pump system requirements |
| 55 | 5.11.5 Test devices 5.11.5.1 Self-contained systems 5.11.5.2 Town main supplied systems 6 Water mist system components 6.1 General 6.1.1 Requirements for components 6.1.2 Pressure rating 6.2 Nozzle |
| 56 | 6.3 Piping and fittings 6.3.1 Pipework 6.3.1.1 Pressure rating 6.3.1.2 Pipe identification 6.3.1.3 Pipe bending 6.3.1.4 Welded joints 6.3.1.5 Threaded joints 6.3.1.6 Mechanical joints 6.3.2 Fittings 6.3.2.1 General |
| 57 | 6.3.2.2 Threaded fittings 6.3.2.3 Mechanical joints 6.3.2.4 Distribution blocks 6.4 Flexible hoses 6.4.1 Hose length 6.4.2 Hoses to be used in areas exposed to fire class B fires 6.4.3 Hose rating 6.5 Pipe supports 6.6 Valves 6.6.1 Shut-off valves |
| 58 | 6.6.2 Pressure regulating valves 6.6.3 Check and non-return valves 6.6.4 Drain/fill valves 6.6.5 Safety valves 6.7 Control valves 6.7.1 General 6.7.2 Strainers and filters |
| 59 | 6.8 Flow switches and flow transmitters 6.9 Pressure switches and pressure transmitters 6.10 Supply components for self-contained systems 6.10.1 General 6.10.2 Excess pressure 6.10.3 Pressure container marking 6.10.4 Design temperature 6.10.5 Gas cylinders and actuation valve 6.10.6 Cylinders and storage containers for water |
| 60 | 7 Main pumps for water mist systems 7.1 General 7.2 Pump set 7.2.1 Operation 7.2.2 Overpressure 7.2.3 Centrifugal pumps 7.2.4 Positive displacement pumps 7.2.5 Pump driver 7.2.6 Pump Cooling 7.2.7 Pump set anchoring |
| 61 | 7.2.8 Positive displacement pump filters 7.2.9 Pump set coupling 7.2.10 Valves and accessories 7.2.10.1 Shut off valve 7.2.10.2 Valve monitoring 7.2.11 Suction pipe 7.2.11.1 Design for centrifugal pumps 7.2.11.2 Multiple units |
| 62 | 7.2.12 Discharge pipe 7.2.13 Pump set rating 7.2.13.1 Pump set capacity 7.2.13.2 Pump set redundancy 7.2.13.3 Pump set capacity calculation 7.2.13.4 Pressure and water capacity of town mains 7.2.14 Pump set operation 7.2.14.1 Pressure devices |
| 63 | 7.2.14.2 Pump set start 7.2.14.3 Pump set stop 7.2.15 Electrically driven pump sets 7.2.15.1 General 7.2.15.2 Power supply documentation 7.2.15.3 Electricity supply |
| 64 | 7.2.15.4 Electric pump set controller |
| 65 | 7.2.16 Diesel engine driven pump sets 7.2.16.1 General 7.2.16.2 Engines 7.2.16.3 Engine cooling system |
| 66 | 7.2.16.4 Ventilation |
| 69 | 8 Testing, acceptance and commissioning 8.1 Acceptance test for water mist systems 8.2 Test criteria |
| 70 | 8.3 Site commissioning test 8.4 Completion certificate and documents |
| 71 | 9 Inspection and maintenance 9.1 Inspection 9.1.1 Inspection schedule 9.1.2 User’s program of inspection 9.2 Inspection and maintenance routines 9.2.1 Weekly routine 9.2.1.1 General 9.2.1.2 Checks 9.2.1.3 Pump starting test |
| 72 | 9.2.1.4 Diesel engine restarting test 9.2.2 Monthly routine 9.2.2.1 Trace heating and localized heating systems 9.2.3 Quarterly routine 9.2.3.1 General 9.2.3.2 Water supplies 9.2.3.3 Electrical supplies 9.2.3.4 Shut-off valves 9.2.3.5 Fire alarm flow and/or pressure switches |
| 73 | 9.2.3.6 Replacement 9.2.4 Half-yearly routine 9.2.4.1 General 9.2.4.2 Dry and deluge valves 9.2.4.3 Test of fire detection and alarm system 9.2.5 Annual inspection 9.2.5.1 General 9.2.5.2 Review of hazard 9.2.5.3 Water mist nozzles 9.2.5.4 Automatic pump set flow test 9.2.5.5 Diesel engine failed-to-start test |
| 74 | 9.2.5.6 Infill valves on water storage tanks 9.2.5.7 Pump and system strainers 9.2.5.8 Pipework and pipe supports 9.2.5.9 Examination of cylinders and tanks 9.2.5.10 Remote alarm transmission 9.2.5.11 System integrity 9.2.6 Three-yearly routine 9.2.6.1 General 9.2.6.2 Storage tanks 9.2.6.3 Water supply shut-off valves, control and check valves 9.2.7 Five-yearly routine 9.2.7.1 General |
| 75 | 9.2.7.2 Testing of nozzles 9.2.8 Ten-yearly routine 9.2.8.1 General 9.2.8.2 Pipework 9.2.9 Maintenance schedule 9.2.10 User’s program of monitoring 9.2.11 Training 10 Documentation 10.1 Installation documentation |
| 76 | 10.2 Documentation for acceptance of design, installation and commissioning |
| 78 | Annex A (informative)Guideline for developing representative fire test protocols for water mist systems A.1 General A.2 Evaluation of the fire hazard |
| 79 | A.3 Evaluation of the compartment conditions |
| 80 | A.4 Determining the performance objective A.5 Setting up the fire test procedure |
| 82 | A.6 Carrying out the test A.7 Documentation and interpretation of test results A.8 Example for fire test report |
| 84 | Annex B (informative)Area of operation for typical automatic nozzle water mist systems B.1 General B.2 Typical system component layouts B.2.1 System components gridded layout |
| 85 | B.2.2 System components terminal layout B.2.3 System components looped layout |
| 86 | B.3 AOs to be determined by full hydraulic calculation |
| 88 | B.4 Most unfavourable and most favourable AO demands and the pump supply curve |
| 89 | B.5 Calculating the number of nozzles and actual area of AO |
| 91 | B.6 Method of calculating the area per nozzle B.6.1 Regular spacing |
| 92 | B.6.2 Irregular spacing |
| 94 | B.7 Shape of the AO B.7.1 General |
| 95 | B.7.2 Shape of the hydraulically most unfavourable location |
| 98 | B.7.3 Shape of the hydraulically most favourable location |
| 100 | B.8 Length of the AO |
| 101 | B.9 Relocation of section valves B.10 Calculating the nozzles operating in the most unfavourable AO |
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BS EN 14972-1:2020:2021 Edition
Fixed firefighting systems. Water mist systems – Design, installation, inspection and maintenance Published By Publication…
