Sure. Very soon. Thanks

It depends on the fire pump selected and storage capacity duration. These two can be calculated based on the fire flow requirements per local building codes. However, NFPA 13 has water supply duration requirements for light, ordinary, extra hazard occupancies. we can consider those as well in case you do not have any local building codes.

Thank you.

1) yes correct. 2) It depends on building code. Every country has its own building codes. Based on that we can define.

Apologies for inconvenience. Pls do let me know u r email id so that I can share it with u

Yes u r right. Most of the contractors consider 2 remotest hydrants and 100 psi min at remotest hydrant. However as per nfpa 24, only 20 psi is enough at the remotest hydrants while performing the calculations. Regarding no. of hydrants to be considered, we can consider one hydrant for maximum 1500 gpm and run the calculations. 100 psi at remotest hydrant can be considered in special cases like for industrial plants etc but depends on the local codes and regulations

Pls go through the playlists available on my KZfaq channel irfancfps

Pls check nfpa.org

Pls check nfpa.org

1) We calculate the water supply needed for the fire pumps to decide the right size for the water tank. 2) Please note that a fire pump performance test is different from a flow test. The flow test is conducted at the existing fire water network tie-in connection to assess whether the new fire water line can be connected. By performing the flow test, we can determine if tapping the new line from the existing one is feasible. Additionally, we need to run calculations for the new fire water line up to the existing tie-in connection to verify if the flow and pressure available are sufficient for the new network."

1) It depends. combination of heat and smoke detectors are not required. Please check the project specifications. However if the end user / Authority Having Jurisdiction insists us to provide then there is no option but to follow them. What type of building is that / room? 2) For flaming fires, normal heat detectors cannot be used. UV / IR detectors must be used and they are very costly.

Thanks

Pls do check nfpa 20 u will find it. I don’t remember the section currently

@irfancfps

Give me some time. Will make a video on that asap

Supply mode is considered when u already selected the fire pump or already u have the details of flow and pressure at tie in connection etc. demand mode is considered to calculate the required flow and pressure irrespective of available flow and presssure. Pls do run the calculations using supply and demand mode and verify then u will understand

Selection of hangers depends on project specifications. However in general we consider swivel hanger upto 2” pipe and more than that we use clevis hanger. Threaded rods will not come in ul or fm ..

However threaded rod shall be provided based on the project specifications

​@@irfancfps rod can ve

​@@irfancfps thread rod can be fire resistant?

This is separate concept. Will make a video soon. However just google it u will get the answer

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Great. Did u able to understand clearly?

Most welcome

Thanks

I already mention the requirements in the video.

U can find my videos available on my KZfaq channel. U can access for free. Just check the playlists to get an idea

Most welcome

Sorry. There might be some issue. Will resolve soon

No need check valve but…. If provided no issue..

Hydraulic calculations will be done considering hydraulically most demanding area and most remotest area only…

@@irfancfps so I will have the hydraulic design plate on all ZCV showing same information (of that most remote area in the building)

@@irfancfps So when alarm check valve are required? In a building of multiple floors, is there a minimum?

Thank u

Thank u

There is no specific terminology for suction side flange. The type of flange can be either slip on flange or raised face flange to be considered based on the fire pump suction side flange. For the water tank, a puddle flange will be installed. Let me know for any further queries.

Flexible connection is not usually installed in fire pumps suction and discharge piping. However, Please refer to NFPA 20 (Ed 2019), Section 4.16.6.5, flexible coupling for strain relief can be used on suction piping.

As per NFPA 25, Fuel tanks shall be atleast two-thirds full at all time.

Yes sure. But need to wait for a little bit..Thanks for understanding

I was focusing on nfpa20. Sure I will post second part of this smoke detector rules very soon.

When pumps are not running, discharge guage reading is zero or slightly high since there is nrv in discharge line.

Pressure gauge installed on the the discharge line is aim to indicate the discharge line pressure. Since pressue gauge is located on the discharge side of pump and before NRV it will indicate static pressure, i.e. Fire water tank static pressure... Let me know if you have different opinion.

@@irfancfps but is not the sensing line supposed to be between nrv and pump casing? In this case how can the pressure switch detect the drop in the system and activates?

@@VikSmiVlogs but is not the sensing line supposed to be between nrv and pump casing? In this case how can the pressure switch detect the drop in the system and activates?

Thanks and welcome

Sorry. There is some glitch. However, please download the video from below link we.tl/t-YIkdY9rBsj

I might not convince you but this is the procedure as per nfpa 13.

Thankful to u r feedback.

Nice!

Please coordinate through email : [email protected]

Email at [email protected]

Thanks

Please check the below video. Hopefully u will find the answer Class 2 | Hydrant Flow Test Procedure | Types of Water Supplies | NFPA 291 | NFPA 13 kzfaq.info/get/bejne/h8mKndN2mLLYnYE.html

Sprinklers in side the pump room will be considered as extra hazard and the office building will be designed according to light hazard

@@irfancfps but what will be the fire pump capacity?? For Light Hazard As per Design Density curve: 0.1*1500= 150gpm Hose Stream allowance: 100 So total= (150+100)= 250gpm For Extra Hazard: design density curve 0.4*2500=1000gpm Hose Stream: 500 So, total = (1000+500)= 1500 gpm As per nfpa 14 for two standpipe 750gpm Now which one shall i need to consider???

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Sure. Very soon

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