Log in to follow, share, and participate in this community. 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... 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... 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... 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... You do not have access to this content's place Hello, i have a question about dry fire extinguish system. Can i use dry chemical extinguish sprinklers on the car parking? 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... Reference: NFPA 13 (2019 Edition) 188.8.131.52 Friction Loss 184.108.40.206.1 Pipe friction loss shall be calculated in accordance with the Hazen–Williams formula with C values from Table 220.127.116.11.1, as follows: (9) Fr... 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... FIRE GUARD See link on a new device by Fire Guard that claims a fire suppression agent (6-inch ball) can extinguish a fire in an area up to 905 square feet. Any information the NFPA has on this type of e... NFPA 20 (2019 edition) Section 18.104.22.168 discusses on the jockey pump sizing to replenish the pressure due to the allowable leakage and normal pressure drops, with a suggestion (a guideline) to select a jockey pump tha... cuando tengo un edificio clasificado como de no gran altura puedo colocar sistema de tubería vertical clase 1 (manual húmedo), sin tanque ni equipos de bombeo, solo que dependa del departamento de bomberos. hello fire experts what NFPA13 requires minimum and maximum pressure for hose streame inside and the hydrant outside # Hello fire protection experts: Is the safety margin that we add during hydraulic calculations of 1bar or 10% mandatory by NFPA13? if yes it is the article refrence Greetings, Does anyone have some really good fire system ideas for remote generation. Imagine that you have 60 locations and getting service in these areas is expensive and sometimes not possible due to weather. ... At a high-rise open structure used for assembly occupancy, each floor is at 8m high and is without external walls. Each is intended to install automatic sprinkler system in each open floor in accordance with NFPA 13- ... Hi all, I am a life scientist that is looking to make a career change. I am intrigued by fire sprinkler design because I have done quite a few installation jobs with my dad as a laborer (he o... How would you classify an indoor (cannabis) plant grow room. Drywall & concrete. Plants are well watered in pots, sitting on palates covered in congregated metal. Lights are securely mounted with wire. Plants are ... In a noncombustible construction stair shaft, NFPA 13, 2013, section 22.214.171.124.2 states that "where noncombustible stair shafts are divided by walls or doors, sprinklers shall be provided on each side of the separation... is there a clearance code for underground pipe that go under or above other pipes in the ground?