Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by sl3656

  1. sl3656

    NFPA 13-2016 - In-Rack Sprinkler Water Demand

    Thanks SprinklerDesigner2. This is a retrofit project due to occupancy class change and we have no fire pump with around 60 psi at the riser base. Looking to protect Class A Plastic Unexpanded in Cartons up to 20 feet. ESFRs would require at least K-14.0 with 50 psi end pressure. Don't think...
  2. sl3656

    NFPA 13-2016 - In-Rack Sprinkler Water Demand

    NFPA 13-2016 has the following statements on how to treat water demand between the ceiling sprinkler system and the in-rack system: 17.1.2.9.6 The in-rack sprinkler demand shall not be required to be hydraulically balanced with the ceiling-level sprinkler system. 23.4.5.2 Water demand of...
  3. sl3656

    NFPA 13 - Thrust Forces for Aboveground Dry Fire Standpipe

    Does NFPA 13 require pipe hangers and supports that are not UL/FM listed to account for pressure thrust forces and any other forces beyond NFPA 13-2019 17.1.2 for five times the weight of the water-filled pipe plus 250 lb at each point of piping support? We have a 6" dry standpipe (NFPA 14...
  4. sl3656

    Multiple Fire Pumps in Parallel (NOT for redundancy)

    Yes both answers addresses my concerns. I was looking for some anecdotal advice on whether parallel pumps were possible. It seems like it is permitted per NFPA.
  5. sl3656

    Multiple Fire Pumps in Parallel (NOT for redundancy)

    I know NFPA 20 has a specific chapter that governs fire pumps in series (the state building code uses the 2013 edition to be specific at the moment). Does anyone know if there are any requirements governing multiple fire pumps in parallel? Note that the pumps would be required as part of the...
  6. sl3656

    Expansion Loop Rated for 225 psi?

    Can someone suggest available manufacturers that supply seismic movement joints that have a maximum working pressure of 225 psi for 6-inch pipework? I am looking at Metraflex and their Fireloops are rated at 175 psi working pressure for the 6-inch version. Any suggestions greatly appreciated!
  7. sl3656

    Heat Tracing / Insulating Seismic Separation Assembly

    Thanks stookey and matt for the replies!
  8. sl3656

    Heat Tracing / Insulating Seismic Separation Assembly

    Has anyone had any experience heat tracing / insulating a seismic separation assembly, per NFPA 13-2019 Figure A18.3(a)? We have a 6-inch fire service line that runs across a building seismic / expansion joint that is currently insulated with 2-inch fiberglass / heat-traced. UL/FM-listed...
  9. sl3656

    Cement-Lined Ductile Iron Pipe for Aboveground Class-I Dry Standpipe?

    Thanks stookey. The dry standpipe is for a underground transit application, which is equivalent to a marine environment in terms of the corrosion. We wanted to propose a corrosion resistant solution without breaking the bank (i.e. going down the stainless route)
  10. sl3656

    Cement-Lined Ductile Iron Pipe for Aboveground Class-I Dry Standpipe?

    Is cement-lined DI pipe allowed under NFPA 14 for aboveground Class-I dry standpipe systems? I checked NFPA 14-2019 (as well as an earlier edition that is applicable to the state), and could not find anything that prohibits its use. Reason for asking is that the AHJ is stating that it is not...
  11. sl3656

    Design / Density Curve - NFPA 13

    Thanks for clarifying Travis.
  12. sl3656

    Design / Density Curve - NFPA 13

    Thanks for the replies and sorry for not responding back sooner. Is there somewhere in NFPA-13 (or a related NFPA code) that stipulates a requirement to perform engineering analysis in determining the sprinkler design parameters (incl. operational area and density), if a specific fire size (in...
  13. sl3656

    Design / Density Curve - NFPA 13

    Referring to the design / density curve from NFPA 13, although the selection point along each curve (e.g. LH, OH-1, OH-2, EH-1 and EH-2) is at the discretion of the fire protection designer, I have seen most designers select the lowest area to achieve the lowest mass flow rate upon activation...
  14. sl3656

    Clean Agent Protected Spaces - Magnetic Door Holds

    @stookeyfp - thank you for pointing me in the right direction.
  15. sl3656

    Clean Agent Protected Spaces - Magnetic Door Holds

    Are magnetic door holds (which are released and allow door closure prior to clean-agent discharge) an NFPA 2001 code requirement or good practice as part of sealing the room, as with damper and local A/C equipment shutdown / closure? I cannot find a clause that stipulates a requirement in the...
See more

Part and Inventory Search

Back
Top