• NFPA 409 - Aircraft Hangar Fire Protection System Design

    Dear Team, We have an Aircraft Hangar of size 90*81 M in our project and I am designing the fire protection system for this Hangar as per NFPA 409-2011, section 6.1.1 (3) – overhead automatic sprinkler system w...
    last modified by suhaskurikkal
  • does fire detection require if there are sprinklers?

    Dear Community,   I'm interested in if it's Allowed do not instal fire detection in area if there are instaled sprinklers?    
    last modified by gk.karkashadze
  • Requirement for foam deluge system

    We create a design of a deluge foam system for the oil extraction plant. NFPA 16 show density  6,5 mm/min. We used instead nozzle open sprinkler k 115. According to NFPA 13 “ Minimum operating...
    last modified by iryna.seleznova
  • kitchen wet chemical system

    We need to install a Kidde wet chemical system in our kitchen. Unfortunately, the supplier who provided the necessary support is no longer in the market. We are totally new to the system. It's a small system with one ...
    last modified by ananthars90
  • Fire Pump Pressure setting

    we have a diesel and electric pump operating in auto mode. As per NFPA 20, the pressure setting for the pump shall be churn pressure+ static pressure. while doing the actual performance test, the churn pressure( zer...
    last modified by ananthars90

    Hello. The question I have is where in NFPA does it say that if you exceed a certain ceiling height you are to use type "xyz" sprinkler heads. Storage height is minimal, 12' at the most. lets just say for talking purp...
    last modified by rbjorkman
  • Fixed Nitrogen Fire Control

    Why not consider a dry means of fire control?  I have one using pure, cohesive Nitrogen gas cloud technology. The Fixed Nitrogen fire control systems store liquid Nitrogen above the system which need refilling m...
    created by denysedbq
  • Determining of Design Area in Hotel Building

    Hi,       i need expert opinion on subject mentioned, I m working in MEP contracting company as a mechanical engineer, I need to perform fire sprinkler hydraulic calculation for one of our pr...
    last modified by alisaif2012
  • driver sizing for fire pumps

    Hello, how do drivers for fire pumps in NFPA 20 sprinkler installations have to be sized correctly? Do the drivers have to be sized only up to the 150% of the rated flow or do the drivers have to be sized to the non-o...
    last modified by marcus.braun
  • NFPA 72, NFPA 2001

    Dear Sirs, in my understanding of NFPA 72, Chapter 24, the Fire Alarm Control Panel can monitor and control the fire suppression system applied to specific areas at the same time that other rooms of the building, for ...

    Hi, my name is Diego Sandoval and I am designing and FIRE FIGHTING SYSTEM.   I have a question related to NFPA 20. I want to know if I can return the relieves towards suction lines in FIRE PUMPS WITH DIESEL ENGIN...
    last modified by diogofse24@hotmail.com
  • Fire Sprinkler System at ICE CREAM Factory

    Hi, I have been working for design of fire sprinkler system for ICE cream factory. It consist of (1) Installation at packing hall where the temperature of packing hall is 15degC. (2) Installation at Cold Stora...
    last modified by nfpaunilev
  • PRV and Fire Pumps

    We have a gravity fed water supply located on a mountain that supplies the city's water system. This supply is being recommended as the water supply for a project at a lower elevation. The water supply is being booste...
    last modified by gordon
  • NFPA 25 - Annual Fire water pump test- Acceptance criteria

    In NFPA 25 , regarding Fire water pump Annual Performance test, one of the acceptance criteria is specified as  pump performance shall be within 95% of the initial unadjusted field test curve. If the initial fiel...
  • Reports of Health Effects of AFFF

    The July 2020 edition of Professional Safety Journal (page 10) discusses a current study by Mauge-Lewis and researchers regarding growing concerns over possible adverse health effects of AFFF (Aqueous Film-Forming Foa...
    last modified by tvanhooser
  • Two Valve Low Point Drains on Dry Systems

    You do not have access to this content's place
    created by sfsprink

    Hello, i have a question about dry fire extinguish system. Can i use dry chemical extinguish sprinklers on the car parking?
    last modified by matep
  • Maximum velocity of 20 ft/s in fire protection piping systems

    NFPA 13 (2020 edition) and earlier editions was silent in putting a limiting velocity in the piping along cross mains and branchlines of its sprinkler system. There are some individuals who specify that the maximum ve...
    last modified by rick.nunez.3000
  • On fitting/s directly connected to a sprinkler: When could the fitting/s be neglected in the calculation of pipe friction loss?

    Reference: NFPA 13 (2019 Edition) Friction Loss Pipe friction loss shall be calculated in accordance with the Hazen–Williams formula with C values from Table, as follows: (9) Fr...
    created by rick.nunez.3000
  • NFPA 20:2019 - Sizing Circuit Breaker from Fire Pump Panel

    I think to use a circuit breaker with only magnetic protection for a single fire pump (without a jockey pump).Should the FRAME of the circuit breaker meet the rated current OR just the current sensor of the circu...
    created by bindim