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  1. pipedream

    Entrained air removal from viscous paste in drum or pail

    maybe you could pull a vaccum on the drum? if the liquid is too thick for the air pockets to move to the top of the drum could you heat the paste with a belt type heater to make the paste less viscous? hope this gives you some ideas. G3
  2. pipedream

    support of vertical piping?????

    Got a call today to install nozzles on the top of two 100 foot concrete silos for sawdust. What would be the best way to hang the vertical piping up the side of the silos? this would be sch. 40 piping with grooved couplings, the silo is approximately six inches thick. There would be two runs up...
  3. pipedream

    Need 400HP Belt Driven Vane Axial Fan, Where can one find one?

    don't know much about what you are trying to do but if this is for air ventilation in a tunneling project would it not be better to have two smaller fans instead of just one large fan in case one of the fans failed there would still be some air cirrculation. just a thought
  4. pipedream

    Sprinkler Head Clearances

    Check into NFPA-13 2002 edition starting a 8.6.5.2, this use to be called the beam blocking rule but has grown much over the last several editions of NFPA. Hope this helps. G3
  5. pipedream

    Electric panel according to Factory Mutual (FM)

    check with your customer, they should be able to provide you with the loss prevention data sheets. Hope this helps. G3
  6. pipedream

    Hydro-test Gauges

    I do not know of anything in NFPA for the pressure range of "test guages", but according to NFPA-13 2002 edition, 8.16.3.3 the required pressure guages shall be listed and shall have a maximum limit not less than twice the normal system working pressure at the point where installed. I always...
  7. pipedream

    sprinkler pipe outside

    if this is a factory mutual job the piping will have to be galvanized if it is a dry system, the fittings can be black. check their loss prevention data sheets.
  8. pipedream

    discharge coefecient of fire sprinklers

    the k-factor is a constant value. it will depend on the maker and the orifice size. typical k-factors for commerial heads orifice US (metric) 1/2"..........k=5.6 (80) 17/32"........k=8.0 (115) 7/16".........k=4.2 (60) 3/8"..........k=2.8 (40) 10mm..........k=4.2 (60)...
  9. pipedream

    Vacuum Pump to Drain Sprinkler Line???

    just use a shop vac onn a drain valve that is close to the heads. duct tape it on and then loosen up the head, it will suck the water up enough to get a bucket under. try the trash bag trick...........trust me it works. G3
  10. pipedream

    Volume of water required for hydrotest

    just a suggestion but fill the ductile pipe full of water and let it sit at least over night. the cement lining will absorb some of the water and has some air trapped in it. just my opion. just wondering ow are you filling he pipe lines........in other words will there be a static pressure in...
  11. pipedream

    Required Water Quality for DELUGE System for Oil Transformers

    traeted water is not needed but it should not contain debris or sediments as this could possibly clog a pipe or spray nozzle. where is your supply coming from? G3
  12. pipedream

    Vacuum Pump to Drain Sprinkler Line???

    when we drain the water out of log drops in finished areas and can not make a mess heres our trick. first loosen the head until it is just hand tight-take a garbage bag and cut the bottom out of it-slide one of the open ends of the bag up over the drop several inches and secure it with duct...
  13. pipedream

    Detailing Threaded Pipe Assemblies

    the guys in the shop very seldom would need a print, they need a cut sheet with line numbers, pipe cut lenght, fitting to be pulled on and how many need to be cut out. the guys in the field need a print to install, to show where and how all the pieces fit together. as far as the simple...
  14. pipedream

    Detailing Threaded Pipe Assemblies

    what you are looking for is the "take out" measure. you need to find one of the threaded fitting manufacturers catalogs and they will list them. if you are stocklisting for the fabricators this will do it. i am not trying to make others mad but if they can't stock list they most definately need...
  15. pipedream

    FPS - Branch Lines -- Bottom Tap vs top Tap

    if this is a dry pipe sprinkler system the branch lines should come out of the top or sides and not the bottom. side or top tap will allow drainage of the pipe as long as the proper slope is applied to the piping. the branch lines will have either upright heads, dry pendent heads, or pendent...
  16. pipedream

    FPS - Branch Lines -- Bottom Tap vs top Tap

    is FPS = fire protection service? G3
  17. pipedream

    sealing of threaded joints

    what is in the pipline? what temperatures, highs and lows? how is this pipe supported, and how often? (vibration?) how are you threading the pipe....what kind of cutting fluids? are the dies in good shape and made for stainless? how are the threads turning out, nice and sharp or torn and...
  18. pipedream

    NFPA 13R

    If it is a hotel of four or more stories, NFPA-13 would apply. The rooms would be light hazard, mechanical rooms, storage rooms, kitchens, etc. would be considered ordinary hazard group I. As far as using cpvc pipe it would be acceptable as long as it meet the AHJ's approval, plans and...
  19. pipedream

    nfpa 13

    two risers will be needed, 52,000 sq. ft. is the limit.
  20. pipedream

    Underground Concrete Water Storage Tank

    i have a customer that has a below ground storage tank. the building is of concrete slab construction with a pre-fab metal building system, the tank is under the building and is covered over with span deck and the vertical fire pump sits on steel beams with the pump extending down into the tank...

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