The temperature rating of a sprinkler shall not be less than 30 Â°C than the highest anticipated temperature of the location of the installation.
Note: If the process conditions in a risk calls for continuous air-conditioning round the clock throughout the year, relaxation may be considered.
In high hazard installations, protecting high piled storage with intermediate sprinklers, the roof or ceiling sprinklers shall have a temperature rating of 141 Â°C.
Under glazed roof or where there are roof sheets of PVC or similar plastic material, the sprinkler rating shall be either 79 to 100 Â°C, or 141 C for high storage.
The temperature rating of the roof or ceiling sprinklers within 3 m of the plan area of the boundary of either an oven or a hot process ventilating hood, fitted with sprinklers shall be the same as the oven or hood sprinklers, or 141 Â°C, whichever is lower. The following colour codes are used to distinguish sprinklers of different nominal temperature ratings.
Fusible link type
|Temperature rating Â°C||Colour of yoke arms|
|Temperature rating Â°C||Colour of hilled liquid|
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