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5.11 Valves
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Introduction
BS9251:2014 Discussions
1. Scope
2. Normative References
3. Terms and Definitions
4. Preliminary work and consultation
4.1 Initial Considerations
4.2 Consultation
4.3 Category of System
4.4 Use of sprinklers as a compensatory feature
4.5 Special circumstances
5. Design
5.1 General
5.2 System type
5.3 Design density and duration of supply
5.3.1 General
5.3.2 Minimum design parameters
5.3.3 System flow rate
5.4 Extent of sprinkler protection
5.5 Sprinkler coverage and positioning
5.6 Residential pattern sprinkler heads
5.6.1 General
5.6.2 Minimum operating pressure and flow
5.6.3 Temperature rating of sprinklers
5.6.4 Sprinkler connection
5.7 Hydraulic calculations
5.8 Water supplies
5.8.1 General
5.8.2 Types of supply
5.8.3 Mains water supply
5.8.3.1 General
5.8.3.2 Design flow rate for mains water supply connections
5.8.3.3 Supply pipe sizing
5.8.4 Stored water supply
5.8.4.1 General
5.8.4.2 Stored water capacity
5.8.4.3 Dedicated stored water supply
5.8.4.4 Shared stored water supply
5.8.4.5 Reduced capacity of stored water supply
5.8.5 Backflow prevention
5.9 Pumps
5.9.1 General
5.9.2 Combined sprinkler and domestic supply pump
5.9.3 Dedicated sprinkler pump
5.10 Pipes and fittings
5.11 Valves
5.12 Frost protection
5.13 Alarm system
5.13.1 General
5.13.2 Alarm devices
5.13.3 Multi-storey blocks of flats
5.13.4 Transmission of alarm signals to alarm receiving centres
5.13.5 Electrically operated alarm devices
6. Installation, Commissioning and Documentation
6.1 Installation
6.1.1 General
6.1.2 Pipework
6.1.2.1 General
6.1.2.2 Pipework support
6.1.2.3 Pipework through structural timbers
6.1.3 Sprinkler heads
6.2 Commissioning
6.2.1 General
6.2.2 Leakage test
6.2.3 Hydraulic test
6.2.4 Alarm test
6.2.5 Compliance certificate
6.3 Documentation
6.3.1 Presentation
6.3.2 Log book
6.3.3 Documents
6.4 System data label
7. Maintenance
7.1 Inspecting and testing
7.2 Reinstatement of the system
7.3 Log book
Annex A
Annex B
Annex B.1
Annex B.2
Annex B.3
Annex C
Annex C.1
Annex C.2
Annex C.3
Annex C.4
Annex C.5
Annex D
Annex E
Annex F
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