This standard lays down the requirements for materials, construction, temperature ratings, and testing methods for automatic sprinkler heads used in fire protection systems. It establishes the color coding for glass bulbs and fusible links to ensure appropriate thermal sensitivity for different hazard environments.
Specifies requirements for the materials, construction, dimensions, performance, and testing of automatic sprinkler heads for fire protection systems.
Quick Reference Values
Maximum working pressure1.0 MPa
Hydrostatic test pressure for body3.0 MPa for 3 minutes
Minimum operating pressure0.05 MPa
Standard nominal thread sizes15 mm and 20 mm
Standard activation temperature (Red bulb)68°C
Key Formulas
Q = K * sqrt(P) — Flow rate formula (K-factor)
Practical Notes
Never paint a sprinkler head, as it will alter its thermal response and may prevent it from operating during a fire.
Always verify that the color code of the glass bulb matches the required temperature rating for the specific hazard classification of the room.
Ensure compatibility of the sprinkler's threaded connection (typically 1/2-inch or 3/4-inch BSP) with the installation pipework.