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  1. FireSprinkler

    ASTM A135 vs A53

    I tried to get a response in another forum but to no avail (thread177-137470). I'd like to find out what the main differences are between piping (specifically as it relates to wet pipe fire sprinkler systems) manufactured in accordance with ASTM 135 vs ASTM A53. ASTM A135 is commonly used for...
  2. FireSprinkler

    ASTM A135 vs A53

    Does anyone know the main diferences between pipe manufactured to ASTM A135 versus A53? Specifically, would it be adventageous to specify that piping for a fire sprinkler system be A53 rather than A135 when A135 is generally acceptable for fire sprinkler systems?
  3. FireSprinkler

    Fire Extinguisher Spacing

    I know that, in Michigan, Fire Extinguishers within comercial areas (offices and such) are spaced for 75' of foot travel (150' between them). What are the requirements for buildings with residential occupancies such as Hotels and Apartments? Are the Extings, spaced for 75' of foot travel...
  4. FireSprinkler

    Hyd. Calcs with Pres. Rest. Valve

    I have a standpipe system in a high-rise building and am using pressure restricting valves (Cla-val #90-21). Any thoughts on the 'best' way to do the hydraulic calculations with the pressure restricting valves? Could I simply calc back top the valve itself and plug in 1000gpm (flow required...
  5. FireSprinkler

    High Rise/High Pressures??

    In a high rise building, I am including one standpipe zone and one fire pump. two of the three class I standpipes would be combined with the floor control stations. On many floors, I should be able to get away with 2 1/2" floor control stations. Therefore, I would be able to use a 2 1/2"...
  6. FireSprinkler

    Factory Mutual QR Concealer

    Does anyone know of a Factory Mutual Approved, Quick Response, Concealed Sprinkler Head?
  7. FireSprinkler

    Apt. Sprinkler Design Area

    I am working on the design of Fire Sprinkler system in a high rise building that will have both hotel floors and apartment floors. Due to the fact it is a high rise building, I would believe that the design is in accordance with NFPA 13 rather than 13D or 13R. My question is, for the Apartment...
  8. FireSprinkler

    PSI at top of standpipe

    NFPA 14 (2000ed) Chapter 5-7(1) Exception No. 1 allows the AHJ to permit a hydraulically calculated standpipe to provide 65PSI at the top (rather than 100psi). Fine. BUT... Exception No. 2 starts off: In other than high rise buildings... Does anyone know why Exception No. 1 would NOT be allowed...

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