We plan the fire-fighting and fire-protection systems in accordance with AHJ (Authority Having Jurisdiction) standards, and/or international standards such as NFPA or FM.
Water is stored in underground fire reserve tank of the stipulated capacity, and is drawn using electrically driven jockey pumps, fire pumps or sprinkler pumps. All pumps have a separate suction line from the fire suction header. Delivery from the pumps is connected to the respective hydrant and sprinkler system, for which installation control valves with hydraulic alarm are provided in the basement. The sprinkler pump is isolated from the main discharge header by a no-return valve so that the hydrant pump can also act as standby for the sprinkler system.
The pumps are designed to maintain a pressure of 7 Kg/Sq.cm to 3.5 Kg/Sq.cm at the farthest hydrant. A standby diesel engine driven fire pump of the same capacity is installed as back-up for the electrically operated fire hydrant/sprinkler pump, as per fire regulations. Independent jockey pumps for hydrant and sprinkler system operate intermittently in order to take care of hydraulic losses in the system and maintain the minimum pressure respectively in wet risers and sprinkler system. Fire pumps rating is in accordance with AHJ directive and also caters to future expansion requirement.
Fire Hydrant System of type Class III (NFPA 14) is generally provided. Internal and external standpipe fire hydrant system is provided with landing valve, hose reel, first aid hose reels, complete with instantaneous pattern short gunmetal pipe. Provision of flow switch on riser is made (if required) by the operator for effective zone monitoring. The flow switch is wired to FAP and indicates water flow on hydrant of the identified zone.
Recessed cupboards/fire hydrant cabinets are strategically located for firefighting requirement. Cabinet locations are decided as per compartmentation plan, in consultation with the Authority.
We locate external hydrants within 2m to 15m from the building, and with a spacing of 45-50m between them. The hydrants are placed within protective structures to avoid damage from vehicle movement. Fire department connections, capable of directly feeding the ring mains or static fire reserve tanks, are also provided near the main entrance.
Based upon the project requirement and storage hazard, we plan and design the Sprinkler System, which is provided with control valves, flow and tampers switches at suitable locations and connected to control module of the fire alarm system for its monitoring and activation.
, we provide clean agent suppression system designed in accordance to NFPA 2001.
We design and install the CO2 extinguishing system comprising of cylinder, piping and nozzle for LT Panel and other electrical panels as per project requirement. Portable fire extinguishers of water (gas pressure), carbon-dioxide and foam type are provided as first aid fire extinguishing appliances.
For fire-protection of the helipad, low expansion AFFF (Aqueous Film Forming Foam) unit/system is provided, in compliance with NFPA 418
Depending on the type of hazard, different varieties and sizes of fire extinguishers are located per standards which form typical manual fire protection systems. Also semi automatic water based systems are classified as manual fire protection systems. In this case the water under pressure will be available in the pipe line. The valves (normally with 1.5” outlets within the building) have to be opened & hoses pulled down to fight the fire. The landing valves & fire hose cabinets are provided for the use of occupants to fight small fires. Hydrants (normally with 2.5” outlets located outside the building) & fire hose houses are provided for the usage of trained fire fighters. These are the most common but effective systems which we design on daily basis per standards & using hydraulic calculations.
For all water based & foam based, automatic or semi automatic fire protection systems the water will be available under pressure at all times. This is achieved by providing fire pump set and water tank, all inter connected. Generally there will be an electric motor driven main fire pump, the size (flow & pressure) of which is based on the highest demand from hydraulic calculations. There will be a stand by Diesel engine driven fire pump of same capacity for emergency purpose. Additionally there will be a pressure maintaining device also called as a Jockey pump whose pressure rating will be equal to that of the main pump but with a very low flow rate. Other mandatory accessories will all be fitted together & the inlet connected to a dedicated fire water tank. The capacity of the tank depends on the hazard nature which defines the time period required multiplied with the flow of the main fire water pump. All of these again needs experienced engineers to design an optimum package meeting the standards, yet economically viable. The team at Heba India has this in abundance with right tools to execute in a very quick time.
As the name indicates, flooding the entire hazard area with huge quantity of water (could be foam too) is known as deluge systems.
These systems are sometimes used for extinguishment, sometimes for control of fast spreading fires & sometimes as surface cooling. Applications are wide & mechanism of operation are also multiple like wet pilot actuation, dry pilot actuation, electrical actuation, manual actuation & these sometime combine with single pre action & double pre action thus making it again the need of skilled & experienced Engineers to understand, engineer & design the specifically required system for water or foam again by running multiple hydraulic calculations. Heba India again is proud to have a team of people who have designed, installed & successfully commissioned hundreds of such systems.
One and the only economical & viable fire extinguishing mechanism with liquid fuel fires is the Foam fire protection system. With the growing demand of these fuels in the modern age the storage, handling & transportation of these fuels need to be protected thoroughly as they are highly flammable. Elimination of Oxygen from the fuel surface by an effective blanket formation of foam is the mechanism of killing a fire in this system. However getting the right mixture(concentrate, water & air), quantity & quality of this foam again needs thorough understanding, engineering and selection of the correct, tested & approved combination of equipment & foam concentrate(available in different types and different percentage concentrates, etc,) lies in the hands of experienced engineers. Multiple hydraulic calculations & many a times reverse calculations will have to be performed to ensure the foam quantity remain for the desired period of operation. Yet again at KRUNAL ENGINERING WORKS, we have such experience with many such systems designed, erected & tested successfully.
One of the oldest & traditional ways of fire protection, which is water based protection system, is in the form of automatic sprinklers.
Krunal Engineering works can provide you with complete designing of sprinkler system for any kind of hazard. Our design facility also has the provision for calculation of water demand.
Various sprinkler system network designing can be done to cater the specific needs of the customers varying from residential to commercial and industrial.
Krunal Compound, Survey No. 285, Near HINDALCO, Ganapatipada, Kalwa (E), Thane 400 605
+91-22-2534 83 33 / 2537 38 62