PART 2
PRODUCTS
2.1
BOILERS
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NOTE: Only allow option of MIL-B-18897 for low
pressure boilers of capacities less then 2930 kW
10,000,000 Btu/h. On/off combustion controls may be
used for up to 880 kW 3,000,000 Btu/h, hi-low-off
type may be used for 585 to 1465 kW 2,000,000 to
5,000,000 Btu/h, and modulating positioning type may
be used for over 880 kW 3,000,000 Btu/h.
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NOTE: Research local, state, and federal emission
standards and place any new or unusual requirements
in this specification section.
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[Firetube, packaged type of standard duty conforming to MIL-B-17452] [or]
[Firetube type (horizontal return tubular and horizontal fire box)] [Water
tube type] [Cast iron, sectional type conforming to MIL-B-18897] [except
that treatment and painting shall be in accordance with manufacturer's
standard practice,] Boilers shall have gross output capacity of at least
[_____] kW Btu per hour when operating at a steam pressure of [_____] kPa
(gage) pounds per square inch gage (psig) at the site under design
conditions when the burner is firing [[No. [_____] oil conforming to [ASTM
D 396] having a higher heating value of [_____] MJ/kg Btu per gallon] [or]
[[natural] [manufactured] [mixed] [liquified petroleum] gas having a higher
heating value of [_____] MJ/kg Btu per cubic foot and a pressure of [_____]
kPa (gage) psig at the fuel train connection].] [Gas fired boilers shall
have a steady state combustion efficiency of at least 80 percent when fired
at the maximum and minimum rated capacities which are provided and allowed
by the controls.] [Oil fired boilers shall have a steady state combustion
efficiency of at least 83 percent when fired at the maximum and minimum
rated capacities which are provided and allowed by the controls.] Boilers
shall comply with local, state, and federal emission regulations for the
fuel being used. Smoke emission shall not exceed Ringlemann No. 1, except
during start-up, cleaning, or soot blowing. Boiler furnaces shall be
equiped with combustion control safety devices conforming to [ASME CSD-1,
for boilers of less than 3660 kW 12,500,000 BTU/HR thermal heating
capacity.] [NFPA 8501, for boilers with thermal heating capacity of 3660 kW
12,500,000 BTU/HR or larger.] [Burners and controls for boilers conforming
to MIL-B-18897 shall conform to MIL-B-18796.] Burners of the rotary type
are not acceptable. Programming controls shall be of the automatic
[recycling] [non recycling] type and shall incorporate means for automatic
self-checking of the circuit at the beginning of each start-up cycle.
Include a repetitive self-checking circuit to check components at intervals
not to exceed the specified flame failure response time in [MIL-B-18796]
[or] [MIL-B-17452] [as applicable] during the entire period of burner
operation. Combustion controls, shall be of the [on-off], [hi-low-off]
[modulating-positioning] type. [Provide connections for remote starting or
stopping of the boilers.] [Explosion relief doors are required.] [Provide
steam operated feedwater injectors.] [Cast iron boilers shall be of the
sectional type and shall conform to the requirements above and as
specified. Boilers shall be [automatic] [semi-automatic,] [or] [manual]
start.] [For each boiler, provide a steam operated soot blower made of
materials that shall withstand expected temperatures.]
SECTION 15516N
Page 10
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