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  1. eboelen

    Boiler Room ???

    Nans, check with your local fire inspection people, they will be able to give you proper instructions. Some cities/counties have their own regulations, furthermore there is your insurance company that will impose its rules and their are federal rules in NFPA. The fire marshall will be able to...
  2. eboelen

    Boiler Selection - Fire Tube vs. Water Tube

    I was personally involved in the design of large firetubes and would like to interject a few comments here since I feel that some unjustified remarks are made. A large firetube is designed for 5 sqft per horsepower "because of perception in the domestic market", for no other reason, nobody in...
  3. eboelen

    Boiler Selection - Fire Tube vs. Water Tube

    The operating conditions you mention are well withing the firetube range tiday. Burning #6 oil is not necessarily a problem: ask your vendors to propose zoned (air operated) sootblowers. Zoned, so that they can be used during the fire cycle and minimize the instantaneous air requirement, air...
  4. eboelen

    sprinkler heads in baghouse?

    pmover, The first observation is that your system is not put together properly. The baghouse is under negative pressure: every leak in the baghouse, mainly around access hatch and door flanges, causes 21% oxygenated air to be drawn in to the baghouse. This naturally increases the danger for...
  5. eboelen

    Dirt in gas control valves

    There will always be some dirt in the gas, whether it comes from millscale or from the gas itself. Good practice is to put a strainer ahead of every control valve, even if it means that you put multiple strainers in one line.
  6. eboelen

    sprinkler heads in baghouse?

    pmover, I have been involved with solid fuel combustion for 30 years and I saw people make similar mistakes. As you point out, the activation of the sprinkler system at the wrong time could create a dangerous situation. Sprinklers in a baghouse are not necessary if the ductwork is laid out...
  7. eboelen

    ASME Sec I welded nozzle calcs

    ER, it says tyhat on the figure at PW16.d, weld shall be larger than the smaller one of 1/4" ..... Eric
  8. eboelen

    ASME Sec I welded nozzle calcs

    t sub min is .375 as defined on p93, being the minimum of .75, .375 and .534. so .7 x t min is .2625 and 1.25 x t min is .468 the second condition makes t1 and t2 each > .25 which results in t1+t2>.5 which then automatically makes t1+t2> .468 You call this nozzle extra heavy (XS) but the wall...

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