MIL-HDBK-1003/7
Table 6
Equipment Selection For Boiler Plants
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* Equipment
*
Size or Type
Pertinent Information
*
*
* Water tube boiler 10,000 to 25,000 pph
*
Coal/oil or coal/oil/gas
* (shop assembled)
*
or coal fired
*
*
*
* Water tube boiler 30,000 to 160,000 pph
Coal/oil or coal fired.
* (field erected)
*
Gas can be used if allowed
*
*
by current energy policy.
*
*
Casing to withstand not
*
*
less than 20 inches W.G.
*
*
Maximum casing surface
*
*
temperature not to exceed
*
*
150 degrees F.
*
*
* Air heater
*
Tubular or regenerative Use for wood firing, some
*
*
coal firing where required
for proper combustion or when *
*
*
economically justified. Keep *
*
*
outlet gas temperature
*
*
above dew point. Maximum
*
*
temperature of combustion
*
air shall not exceed 350 deg F *
*
*
for coal stoker or wood chip
firing; pulverized coal firing *
*
*
*
may use temperatures up to
*
*
600 deg F. Minimum flue gas
*
*
temperature range is 300 to
*
*
350 degrees F.
*
*
* Economizer
*
Bare tube or cast iron
Use where economically
* (part of boiler
*
covered tube for coal
justified. Keep outlet gas
* unit)
*
or high sulfur oil.
temperature above dew point.
*
*
*
*
Finned tubes for No. 2
Keep water inlet
*
*
fuel oil, gas.
temperature from 230 deg F
*
*
to 250 degrees F depending
*
*
on sulfur content of fuel.
*
*
* Superheater
*
Drainable
* (part of boiler)
*
*
*
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