Deluge fire sprinkler systems and their inspection and testing requirements

Fire sprinklers are of various types, and they have specific applications. The traditional sprinklers are ideal for residential and small-scale commercial areas where the fire can be contained within a small space. But if we consider the industrial areas, like any manufacturing plant, research facility, and so on, the water required to extinguish the fire will be huge. Unfortunately, the traditional fire sprinklers won’t be able to meet the requirements.

This is where the deluge fire sprinkler system comes into play. These have open and wide nozzles, and the pipes are always dry instead of being pressurized using air. Therefore, once the smoke or thermal detectors detect the presence of fire, water rushes in through the pipes, and the sprinkler heads spray the water over the concerned area. However, water rushes out of all the discharge valves instead of some to extinguish large-scale fires.

In this article, we will explain the process to be followed for inspecting and testing the deluge fire sprinkler systems.

Inspection of the Deluge fire sprinkler system components

Inspection is the process through which you will confirm that the fire sprinkler system is in good condition and that it will work fine in case there is a fire in the area, and the system is switched on. The inspection needs to be done based on a certain frequency. In this section, we have explained the frequency and the parts you have to inspect for the normal and feasible operations of the Dubai deluge fire sprinkler system.

1. Daily: You need to check the enclosures of the system daily, especially if it is cold weather, because they can have snow build-up and get blocked.

2. Weekly: You need to check the dry pipe gauges, pressure relief valves, and pipe casings every week because these are associated with pressure maintenance and keeping the pipes connected to the sprinkler head dry.

3. Monthly: The exterior of the deluge valves, control valves, dry pipes, and alarm valves need to be checked every month. If these are blocked or rusted, the system won’t work according to the expectations, and the fire won’t be extinguished. You also need to check if the spray nozzles are positioned properly and facing the right direction.

4. Quarterly: Some of the main parts you need to check quarterly are the connections with fire extinguishing components, any signal devices working as the supervisors, drainage, and the foam concentrating drainers.

5. Half-yearly: If there is any supervising signal generation device connected to all the valves in the fire extinguishing system, you need to check the working every six months.

6. Annually: You need to check if the sprinklers are in good condition and the ones that need replacement or repair. You also need to check the spare units you have in hand so that you can replace the bad ones in the coming year. The pipes and fittings also need to be checked in case there are rusted and corroded parts. Check the hangers and supports installed to support the entire system.

Testing of the Deluge fire sprinkler system components

fire sprinkler system components

Every year, you must test the following components involved in the Dubai deluge fire sprinkler system.

a. Deluge valve trip test

b. Control valve positioning and its operations

c. Operational examination of the foam water systems

d. Water supply pipes and fixtures

e. Supervisory valves

f. Manually-controlled actuation devices

g. All components present in the assembly of backflow preventionz

h. Discharge device testing

Conclusion

In this article, we have briefed you about the areas you need to test and inspect in the deluge fire sprinkler system. So, what are you waiting for? Get started with the entire process so you won’t have to wait any longer for testing purposes.

Key considerations in fire pump design and installation

Specific pressure is maintained when the hoses are connected to the water source, or the sprinkler system is connected to the water source. It is this pressure that controls the flow of water and its volume. But if the pressures are reduced, water won’t flow at the required volume or the speed needed to extinguish the fire. This is where the fire pumps come into play,

Fire pumps are special equipment units installed to maintain the pressure in the fire extinguishing system and ensure the water is sprayed at the right volume and speed. However, the designing and installation process of the pumps is not easy, especially because certain rules and regulations need to be confirmed.

The following article explains the right design and fire pump installation process that must be followed at all costs.

Key considerations for the fire pump

Need of the fire pump

The first thing you need to check is the requirement of the fire pump system. You don’t need to connect the sprinklers with the fire pump if there are only a few sprinklers and it is the residential unit. Usually, the fire sprinklers utilize the water from the main supply system, and in residential areas, the supplied water is in huge volume than the consumption need.

But when considering the commercial areas, the supplied water pressure won’t be adequate. Furthermore, there are several other fire sprinklers on different floors. So, to maintain the water flow to each sprinkler, you need to ensure the system is connected to the fire pump. The device will easily maintain the water pressure and supply the same to all fire sprinklers.

Fire Pump Installations

Types of fire pumps

Two types of fire pumps are usually used in commercial areas. These systems work differently and also have different requirements. Therefore, before installing the system, you must understand which fire pump system will be suitable.

  1. In the positive displacement pumps, the water pressure is maintained by repeatedly allowing a certain volume of the water in the pump’s internal chamber and compressing the same before releasing it through the discharge valve.
  2. Centrifugal pumps use an impeller that rotates the incoming water at high speed, pushing huge water volume towards the discharge valves. As a result, the water pressure is maintained at the optimum level, and the fire can be extinguished easily.

Choosing the fire pump driver

In the centrifugal fire pumps, several drivers are used. You need to choose the right one to ensure the working of the equipment is optimized. For example, the driver using petrol and diesel is the best compared to the ones using a single type of driver. Also, you need to ensure the chosen driver can meet the requirements of the impeller and the pressure to be generated.

Conclusion

In this article, we have shared the details about the design process and fire pump installations that every company needs to follow. If the processes deviate, there might be legal complications. Plus, the fire pump won’t work in the best way, and the fire won’t be extinguished. So, ensure you follow the process from end to end and work like a pro to extinguish the fire and prevent it from spreading further.