AS 6183:2025 adopts and modifies ISO 6183:2022, which specifies requirements and gives recommendations for the design, installation, testing, maintenance and safety of fixed carbon dioxide firefighting systems in buildings, plants or other structures
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.21 Terms related to occupied and unoccupiable areas
4 Use and limitations
4.1 General
4.2 Uses for carbon dioxide systems
4.3 Limitations for carbon dioxide systems
4.4 Temperature limitations
5 Safety
5.1 Hazard to personnel
5.2 Safety precautions
5.2.1 Normally occupied and normally unoccupied areas
5.2.2 Warning notices for occupiable areas
5.2.3 Warning notices for unoccupiable areas
5.3 Electrical hazards
5.4 Electrical earthing
5.5 Electrostatic discharge
6 System design
6.1 General
6.1.1 Introduction
6.1.2 Specifications
6.1.3 Working documents
6.2 Carbon dioxide supply
6.2.1 Quality
6.2.2 Quantity
6.2.2.2
6.2.3 Container arrangement
6.2.3.1 General requirements
6.2.3.2 Conditions for the storage of pressurized containers
6.2.3.3 Arrangement for high-pressure containers
6.2.4 Storage containers
6.2.4.1 General
6.2.4.2 Marking
6.2.4.3 High-pressure containers
6.2.4.4 Low-pressure containers
6.2.4.5 Operating temperatures
6.3 Distribution
6.3.1 General
6.3.2 Piping
6.3.3 Fittings
6.3.4 Pipe and valve support
6.3.5 Valves
6.3.6 Nozzles
6.3.6.1 Nozzle choice and location
6.3.6.2 Nozzles in ceiling tiles
6.3.6.3 Marking
6.4 Enclosures (total flooding)
6.4.1 Structural strength
6.4.2 Loss through openings
6.4.3 Ventilation systems
6.5 Detection, actuation and control systems
6.5.1 General
6.5.2 Shut-down of plant and equipment
6.5.3 Automatic detection
6.5.4 Operating devices
6.5.4.1 General
6.5.4.2 Automatic operation
6.5.4.3 Manual operation
6.5.4.4 Pilot operation
6.5.5 Control equipment
6.5.5.1 Electric control equipment
6.5.5.2 Electrical actuators
6.5.5.3 Pneumatic control equipment
6.5.5.4 Mechanical cable release systems
6.5.6 Audible alarms and visual indicators
6.6 Local control (LC) and local control stations (LCS)
7 Carbon dioxide flow and concentration calculations
7.1 General
7.2 System flow calculations
7.2.1 General
7.2.2 Friction losses
7.2.3 Pressure drop
7.2.4 Valves and fittings
7.2.5 As-installed calculations
7.2.6 Specific requirements
7.3 Carbon dioxide concentration requirements
7.3.1 Flame extinguishment
7.3.2 Inerting
7.4 Total flooding quantity
7.4.1 General
7.4.2 Design quantity
7.4.3 KB factor
7.4.3.1 General
7.4.3.2 Effect of ventilation systems that cannot be shut down
7.4.3.3 Effect of openings (see 7.4.2)
7.4.3.4 Effect of enclosure temperature
7.4.3.5 Simultaneous flooding of interconnected volumes
7.5 Design of local application systems
7.5.1 General
7.5.2 Carbon dioxide requirements
7.5.3 Rate by area method
7.5.3.1 General
7.5.3.2 Nozzle discharge rates
7.5.3.3 Area per nozzle
7.5.3.4 Location and number of nozzles
7.5.4 Rate by volume method
7.5.4.1 General
7.5.4.2 Assumed enclosure
7.5.4.3 System discharge rate
7.5.4.4 Location and number of nozzles
7.6 Duration of protection — total flooding systems
