Fire Protection Systems

franzjosephporka in Fire Protection Systems2 hours ago (Show more)

Hi FPS(s), I am fairly new to the fire protection industry and I was tasked by my senior to study and familiarize myself with NFPA 13 and other NFPA codes(NFPA 14,20 & etc.). I know that this is very important considering that I will have to comply with all the applicable codes and standards in designing fire protection system and I am doing just… (Show more)

eodn2 in Fire Protection Systems2 weeks ago (Show more)

Fire detection for sulfur storage

Please recommend a suitable detector for sulfur storage. Please explain the reason why you recommend it.

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eodn2 (to peter@dwan.ca) 10 hours ago (Show more Show less)

Dear Sir. Thank you for your advice.

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hazmanmech in Fire Protection Systems4 weeks ago (Show more)

FOAM SYSTEM PIPING

Kindly clarify Black steel pipe can be used in the foam concentrate line? As per NFPA 16 2019 Clause 6.7.2.1 Foam concentrate pipe and valve shall me made of one of the following materials 1.Brass 2.Bronze 3.Stainless steel (304 or 316) 4.Other materials accordance with manufacturer certification and approved by AHJ

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nocivus (to hazmanmech) 22 hours ago (Show more Show less)

See NFPA 11 section 4.7.1, although it is best to consult with the foam manufacturer. Most foam manufacturers publish a compatibility bulletin on their webpage.

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daniyalahmad119 in Fire Protection Systems3 days ago (Show more)

Min flowrate requirement

As per NFPA 14 (7.10.1.1.2) if a standpipe is serving 3 hose reels at a particular floor then we must accommodate 750 gpm thru it. If I have a building that is spread over a large area but a pump that is limited to 500 gpm, does this mean I have to give separate stand pipes to every 2 hose reels? There are many hose reels installed but if I… (Show more)

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nocivus (to daniyalahmad119) 2 days ago (Show more Show less)

The 750 GPM is requires regardless of the amount of standpipes. The problem is that the pump is rated for 500 GPM. Your options are: 1) Change the pump to a 750 GPM rated one. 2) Add another pump. 3) Talk to the AHJ to see if they are willing to accept the 500 GPM pump and/or propose alternate solutions that provide similar performance.

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fridhi.mohamed in Fire Protection Systems2 weeks ago (Show more)

Pressure sensor - NFPA 20

Good day, I wanna limit the shutoff pressure of the firewater pump to a value equal to 105% of the rated head without installing a PCV on the discharge manifold. A supplier offered a pressure sensor to control the shutoff pressure. Is it compliant to the requirements of the NFPA 20 or not cause I didn't find an answer.

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milt.werner (to fridhi.mohamed) 2 days ago (Show more Show less)

NFPA 20 now prohibits of the use of main relief valves for “normal” system pressure control. They are only allowed for the purpose of preventing system damage during abnormal conditions. Both variable speed diesel drivers and electric motor drive variable speed controllers use active feedback control to regulate the pump discharge pressure. A…

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gustavocanizzo in Fire Protection Systems5 days ago (Show more)

Centrifugal Pump Capacities in combinated fire systems

Hi everyone, I am designing a system that has automatic sprinklers, deluge system, hoses and hydrants. Once I finish the hydraulic calculation of the systems working together, when I try to select the pump system, in NFPA 20 (2016) 4.9.1 it sais: "A centrifugal fire pump for fire protection shall be selected so that the greatest single demand for… (Show more)

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bobs47 (to gustavocanizzo) 4 days ago (Show more Show less)

I think you are making it too hard. For example, if the pump is rated 1000 gpm, the largest single demand can be up to 1500 gpm. If electric motor driven, the motor service factor (typically 1.15) can be used for the 150% flow point. If engine driven, the engine must be rated for the power required at the 150% point after derating for…

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nspagforums@sharpaccess.com in Fire Protection Systems4 days ago (Show more)

smoke detector replacement battery vs 120-v

smoke/CO alarm inquiry i've searched extensively, cant find s specific answer. I live in Pennsylvania House built in about year 2000 it has about 4 smoke detectors, i do NOT believe they are wired to 120-V, i blieve they are wired to a DSC alarm system through standard low voltage alarm wire. I am eventually taking out the OLD dsc alarm system… (Show more)

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nspagforums@sharpaccess.com (to milt.werner) 4 days ago (Show more Show less)

thanks for reply, i will review this

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sahawnehmajdi in Fire Protection Systems6 days ago (Show more)

Alarm Check Valve

Dear Pro, i am making a list of the locations the "inspector test connection" is mandatory to be placed as we are getting alot of contractors question of its presence. NFPA 13 states that it shall be installed where there is an alarm check valve. 16.14.1.4 The alarm test connection shall be permitted to be installed in any location on the… (Show more)

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sahawnehmajdi (to sahawnehmajdi) 5 days ago (Show more Show less)

thanks guys, appreciated

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samverabennett in Fire Protection Systems6 days ago (Show more)

In a existing 7 story Non-Sprinkled Residential Condominium building where the top living floor is 62’3” from the level of the Fire Vehicle access, Is NFPA requirement to provide fire pump to provide Flow and pressure on the roof.

This is a existing non-sprinkled that was build in the early 70's with a existing 4" standpipe and 4" FDC. The existing pump is non listed and not working. Sense it is not a high rise. It is a manual wet standpipe with small city water connection.

ykarwi in Fire Protection Systems6 days ago (Show more)

Automatic Smoke Alarms(Battery Type)

CFC 2016 Requirements: 1103.7.5 Group R-1: A manual fire alarm system and automatic smoke alarms shall be installed in existing Group R-I. Exception: automatic smoke alarms Except if existing building equipped with an approved, supervised sprinkler system installed in accordance with Section 903. My question is can we provide Automatic… (Show more)

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