CIVIL DEFENCE DEPARTMENT MINISTRY OF INTERIOR, QATAR

FIRE SAFTEY STANDARDS

MINIMUM REQUIERMENTS

QCDFSS-4.4-01_Private Hydrants_Rev D.doc Revision D Page 1 of 1

Material:

PRIVATE FIRE HYDRANTS FSS No: 4.4

Item Provisions Notes

1.0 Fire Hydrants shall be provided external to buildings and spaced such that no part of any building is more than 50m from the nearest hydrant.

No of Hydrants

2.0 The latest edition of the NFPA 24 Installation of Private Fire Service Mains and Their Appurtenances shall be applied for the approval of Fire Safety Plans and subject to the following.

3.0 Hydrants shall be wet or dry barrel type with a minimum 4” nominal diameter barrel and two 2½” instantaneous fire hose connections.

Type

4.0 Each hydrant shall be provided with its own isolating gate valve. Such gate valve shall be located in a pit at the base of the hydrant and shall be listed for such service. The lowest point of the valve pit shall be no more than 1m below the surrounding grade.

5.0 Water Supplies shall be sufficient to provide 50 psi at the hydraulically most remote fire hydrant flowing a minimum of 500 gpm. The minimum flow rate shall be increased by 250 gpm for every additional hydrant up to a maximum of 1,250 gpm.

Flow rate

6.0 Hydraulic calculations shall be performed as prescribed in NFPA 14, paragraph 5-9.1.2 Hydraulic Calculation Procedure.

Pipe size

7.0 Where the pressure at the hose connection exceeds 175 psi, an approved pressure regulating device shall be fitted to the outlet of the hose connection. The inlet pressure shall not exceed the device’s working pressure.

Maximum working pressure

8.0 The water supply shall be capable of providing the above minimum requirements for a minimum duration of 30 minutes.

Water capacity

9.0 The adequacy of the water supply to meet the above minimum requirements shall be documented and submitted for review at plan approval stage and shall demonstrated at final inspection.

10.0 For low hazard developments the hydrants may be supplied from the potable water supply network provided that all the criteria above are met and the distribution piping is configured such that isolation of any section of the piping to enable repairs to a break, will not isolate more than one building.

Low hazard developments

Prepared by: Paul Khoo Date: 28 October, 2007