Page 10
3.3.2.1 All applicable tests of table 3 should be conducted for every new fire extinguishant gas, or mixture of gases.
3.3.2.2 Only Test 1 is required to evaluate new nozzles and related distribution system equipment (hardware) for systems employing fire extinguishants that have successfully completed the requirements of 3.3.2.1 Test 1 should be conducted to establish and verify the manufacturer's minimum nozzle design pressure.
3.4 Extinguishing system
3.4.1 System installation
The extinguishing system should be installed according to the manufacture's design and installation instructions. The maximum vertical distance should be limited to 5m.
3.4.2 Agent
3.4.2.1 Design concentration
The agent design concentration is that concentration (in volume per cent) required by the system designer for the fire protection application.
3.4.2.2 Test concentration
The concentration of agent to be used in the fire extinguishing tests should be the design concentration specified by the extinguishing system manufacturer, except for Test 1 which should be conducted at 83% of the manufacturer's recommended design concentration but in no case at less than the cup burner extinguishing concentration.
3.4.2.3 Quantity of agent
The quantity of agent to be used should be determined as follows:
3.4.2.3.1 Halogenated agents
W= (V/S)・C/(100-C)
where:
W= agent mass, kg
V= volume of test enclosure, m3
S= agent vapour specific volume at temperature and pressure of the test enclosure, kg/m3
C= gaseous agent concentration, volume per cent.
