Sayyed Fire Integration
Fire fighting systems

Automatic sprinkler systems

A grid of heads across the whole floor plate, each one its own detector and its own nozzle. Hydraulic design, supply, installation, testing and commissioning.

A brass upright sprinkler head with a red glass bulb, inside a chrome guard cage, on black painted pipework.
ArnoldReinhold · CC BY-SA 4.0
Scope
Survey → commissioning → AMC
Practice
IS 15105 · NBC 2016 Pt.4
What it is

It puts the water where the fire is, and nowhere else

A sprinkler head is a detector and a nozzle in one object. Its glass bulb holds the water back until the air around that head reaches its rated temperature, so only the heads over the fire open — which is why a real sprinkler activation usually means one or two heads and a wet patch of floor, not a flooded building.

Design starts with the hazard classification of each area, because that sets the density of water the grid has to deliver and the area it has to deliver it over simultaneously. From there the pipe sizes, the head spacing and the pump duty follow by hydraulic calculation rather than by rule of thumb. We prepare those calculations and the layout drawings for consultant and fire-brigade approval before ordering, since a change after the pipework is up is expensive.

Installation is coordinated against the ceiling: the grid has to clear ducts, trays and beams while every head keeps the clearance it needs to throw properly, and a head boxed in by a later false ceiling is a head that will not work. Commissioning is witnessed at the installation control valve — flow test, alarm valve, flow switch to panel — and the as-built drawings and head schedule are handed over with the system.

Equipment

What the installation is built from

The equipment list for a typical wet-pipe sprinkler grid. Heads are selected per area — a pendant head over an office and a sidewall head in a corridor are not interchangeable.

Pendant and upright headsThe standard grid heads, hanging below the ceiling or standing above the pipe where there is no ceiling to hide it.
Sidewall headsFor corridors, lobbies and rooms where a run of pipe across the ceiling is not practical.
Concealed and flush headsBehind a flat cover plate that drops away on activation, where the ceiling finish matters.
Velocity and extended-coverage nozzlesFor high-ceiling and storage areas where a standard head cannot reach the risk.
Installation control valve setThe alarm valve, main stop valve, pressure gauges and drain that make one grid a testable, isolatable installation.
Flow switches and zone control valvesPer floor or per zone, so the panel reports which part of the building has flowed and that part alone can be shut.
Test and drain assemblyThe point where the system is proved on every service visit without dismantling anything.
Pipework, fittings and supportsSized by calculation, with hangers and bracing at the spacing the pipe run requires.
Head guards and escutcheonsGuards where a head is exposed to knocks — plant rooms, car parks, warehouse aisles.
Pump set and pressure controlMain sprinkler pump, jockey pump and standby, with the control panel and interlocks.

Tell us about the project

Send the drawings or the BOQ and we will price it line by line. Most enquiries start with a site visit, because the site decides the system — not the catalogue.