TATA Pipes - Fire Fighting

It has evolved as a prime safely parameter for any real estate development. For any construction above 3 floors, irrespective of being residential or commercial and manufacturing units, fire-fighting is now a mandatory requirement.

Tata Pipes have forged market leadership in the Fire-fighting segments by providing a clearly superior performance over competition. Usage in projects throughout India is testimony to Tata Pipes' attention to quality and safety.

Sizes normally used range from 25 mm to 300 mm NB "C" Class MS Pipes with plain end or socketed confirming to IS: 1239 & IS: 3589 specifications.

Guidelines For Water Supply Arrangements For Fire-Fighting
(IS: 3844 & IS: 9668)

Schematic diagram of conventional Fire Fighting hydrant system

Basic requirements as per standard norms of Fire-Fighting (IS 3844 & IS 9668) in high-rise buildings are as given below -

  • For buildings of height of 18 mtrs to 30 mtrs, the risers should not be less than 100mm internal diameter.
  • For buildings exceeding height of 30 mtrs, the risers should not be less than150 mm diameter.
  • FThe hydrant coupling valve in each floor should be of minimum 65 mm MS Pipe.
  • Hose reel bore of 25 mm diameter with 8 mm hose should be used.
  • For effective water jet force, a 12.5 mm bore nozzle should be used.
  • Overhead tank should not be of capacity less than 20,000 litres.
  • The underground tank should not be of capacity less than 1,00,000 litres.
  • Depending on the height of the building, 80mm to 100 mm pipes should be used for line from pump to main hydrant.
  • For individual floor lines, pipes of diameter 25mm to 32mm should be used.
  • For sprinkler system, 25mm pipes should be used.

Internal Hydrants

In an internal hydrant, the installation comprises of the following elements:

  • Riser mains, down-comer mains or external mains to feed water from the source to the required point under pressure.
  • Fire fighting pump/pumps with all fitments and components and pump control panel, housed in a pump house.
  • All necessary components like internal hydrants (landing valves) and external hydrants, hose reels, hoses and branch pipes, suitably housed.
  • Hydrant valves - to be mounted horizontally to prevent impurity deposition.

External Hydrants

  • For external hydrants, piping (water main) should be laid preferably underground, to avoid it getting damaged by moving vehicles, etc
  • To avoid rusting, underground pipes should be either of cast iron conforming to IS 1536 or MS/GI conforming to IS 1239, in which case it should be properly treated with a coat of primary paint with two coats of bitumen paint
  • The pipes should be properly supported on pedestals - not more than 3 m apart
  • Underground pipes should be laid 1 m below to avoid damage during road repair. At road crossings where heavy vehicles are expected to pass, it should pass through RCC pipe tor additional protection

Suction and Delivery Pipe Sizes

The suction and delivery pipes should be of adequate size to meet the functional requirements of the pump, and should not be less than following:

  Suction Delivery
a) 450 l/min terrace pump 50 mm 50 mm
b) 900 l/min terrace pump 70 mm 50 mm
c) 1 400 l/min terrace pump 100 mm 100 mm
d) 2 280 l/min fire pump 150 mm 150 mm
e) 2 850 l/min fire pump 200 mm 150 mm
f) 4 540 l/min fire pump 250 mm 200 mm

Risers & Pumps

  • The rising mains/down-comer mains should be of galvanized iron pipes conforming to medium class of IS 1239.
  • The pump should have an alternate source of power supply in case of emergencyo.
  • The main fire pump at the underground water tank, with the capacity to discharge 900 litres per minute at 3 bar pressure as easured at the terrace level, should be installed.
  • Good quality pumps like Lubi or Kirloskar should be used for better fire fighting efficiency.