Fire Protection Systems

cwc30col in Fire Protection Systems3 years ago (Show more)

does a walk in shower counts in the bathroom area calculation to determine if you need a sprinkler in a residential apartment?

The question is in reference to: Where NFPA 13 systems are installed in residential applications, sprinklers can be omitted from bathrooms that do not exceed 55 square feet (5.1 square meters) in area as long as the walls and ceiling provide a 15-minute thermal barrier. a sprinkler coverage in the bathroom wouldn't be able to reach a walk in… (Show more)

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ghalib.hamidi (to lpgallagher) 1 day ago (Show more Show less)

Do these enclosed showers need to have a sprinkler head of their own?

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carl_fromm in Fire Protection Systems5 days ago (Show more)

Diesel vs. Electric Fire Pumps

We are planning to use two vertical turbine fire pumps (one working, one standby spare) to provide seawater for firefighting at the new wharf at a marine oil terminal. Standard practice would be to provide one electric-driven and one diesel-driven pump. Locating a diesel tank on the offshore platform, however, introduces a concern over potential… (Show more)

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bayrammetinn (to jpotvin) 2 days ago (Show more Show less)

Dear Jessica Potvin Hope that you are doing well. As you may have seen through the installation drawing of the vertical turbine pump, there are too many important points with them. Installation Depth for correct NPSH values, materials for sea water application and thrust assembly for the pump working. These kind of applications are much more…

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securesystemsza@gmail.com in Fire Protection Systems4 days ago (Show more)

Electronic damage following the discharge of a gas suppression system.

Does anyone know if there has been studies done on damage to electronic equipment such as switches following the activation of a Pyroshield gas suppression system in a Data Center? We are aware that hard drives can be compromised by the sound level. Are there any codes specifying nozzle types for Data Centers?

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cdafd (to securesystemsza@gmail.com) 2 days ago (Show more Show less)

Yea that electric stuff, never no till you hit the right switch and you shut down Disneyland. Have you asked higher ups/ engineers from the company that services the clean agent system. I would start there, unless or maybe, they did an accidental dump. Or send a sample of devices out for testing???

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mesposito in Fire Protection Systems3 days ago (Show more)

Standpipe requirements

I currently have a type 5B podium building under construction in my area. It is 3 stories with retail on the 1st floor and residential on the 2nd and 3rd floors. The building will be fully sprinklered with a 13 system. While the building does not require a standpipe by the height, it is 330 feet in length. The design team has agreed to a standpipe… (Show more)

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cdafd (to mesposito) 3 days ago (Show more Show less)

I agree it should be there If installed, say in the middle, it is only covering 20 feet on each side?? You could bring up the liability factor, if something goes wrong and hoses don’t reach Maybe throw in insurance factor And will the ahj approve the design

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mjkfire2000 in Fire Protection Systems6 days ago (Show more)

What is the equation for transport time of smoke as related to ceiling height?

I have been looking through the appendix B of NFPA 72 and I cannot find an equation where I can get the transport time of smoke as a correlated to the ceiling height. For example, I am trying to find the time it would take smoke to reach the top of a coffer (23ft) and then spill over into the next coffer. The top of the koffer is 23ft and the… (Show more)

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mlaurence (to mjkfire2000) 3 days ago (Show more Show less)

What is the context of the question? If this is to calculate smoke detector response time you would need a detector(s) in the high point of the ceiling regardless. I think you will need to treat the lower portions of the ceiling as if they are separate beam pockets and provide coverage there as well. The ceiling jet dynamics are affected by the…

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kevin.duvall in Fire Protection Systems4 days ago (Show more)

How often do paint booth fire suppression and kitchen hood suppression systems need to be tested ?

How often do fire suppression systems in paint booths and kitchen hoods need to be tested.

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cdafd (to kevin.duvall) 3 days ago (Show more Show less)

Kitchen is semi- annual Would have to find the NFPA reference. This is from IFC: 904.12.6.2 Extinguishing system service. Automatic fire-extinguishing systems shall be serviced at least every six months and after activation of the system. Inspection shall be by qualified individuals, and a certificate of inspection shall be forwarded to…

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mfarmer in Fire Protection Systems4 days ago (Show more)

New piping for 4 new heads on an existing system, hydrostatic test or system pressure?

Question on NFPA 13 25.2.1 Hydrostatic Tests section. Section 25.2.1.4 states that "Modifications to existing piping systems shall require testing at system working pressure. Section 25.2.1.4.1 states "Where modification is made to an existing system affecting more than 20 sprinklers, the new portion shall be isolated and tested at not less… (Show more)

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nocivus (to mfarmer) 4 days ago (Show more Show less)

If the number of head added to the system is less than 20, the addition can be hydrostatically tested at the maximum expected system pressure. It can be tested separate form the original system, but it might be easier to connect to the addition to the original system and repressurize the entire system to its normal system pressure. If no leaks…

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andrewm@jp2g.com in Fire Protection Systems4 days ago (Show more)

Fire Protection For Storage Room in Light Hazard

I have a light hazard building (office and clinic) with a 1080sq.ft. area for storing small medical kits in individual cases. They are placed on shelves about 6ft high and NOT on pallets (this is not a warehouse with forklift access). What commodity class would that be, if the items are not on pallets, and does this require ordinary hazard… (Show more)

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nocivus (to andrewm@jp2g.com) 4 days ago (Show more Show less)

The commodity class will depend on what is being stored in the store area. NFPA 13 table A.20.4(b) provides a list of common commodities and its classification.

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fm4785558 in Fire Protection Systems6 days ago (Show more)

NFPA2001_Clean Agent_Piping Thread

Dear All NFPA2001_2018 edition says for piping threads; 4.2.2.6 All threads used in joints and fittings shall conform to ASME B1.20.1, Standard on Pipe Threads, General Purpose, or ISO 7-1, Pipe Threads Where Pressure-Tight Joints Are Made on the Threads — Part 1: Dimensions, Tolerances and Designation. Joint compound, tape, or thread lubricant… (Show more)

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nocivus (to fm4785558) 4 days ago (Show more Show less)

Where I am, threads on pipes other than NPT are rare. Locally, all dies to make threads on pipes and almost all fittings available are NPT. NFPA 2001 requires threads to comply with either ASME B1.20.1 or ISO 7-1.

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m0546783103 in Fire Protection Systems7 days ago (Show more)

spacing between hydrants

What is the maximum spacing between fire hydrants in local public streets in Industrial cities?the below table relates it to the flow requirements which is not clear for me .which flow is intended My case is the public streets not the building scope

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