2.1.1
Identical Items
Provide physically and mechanically identical boilers and equipment of the
same classification, size or capacity to permit the interchangeability of
replacement parts. This requirement includes parts, assemblies,
components, and accessories. Parts provided on the same type unit
regardless of size and identifiable by identical part number shall be
functionally and dimensionally interchangeable. No deviation is acceptable
without prior written approval of the Contracting Officer.
2.2
[COAL/OIL] [COAL] FIRED BOILER
Multiple-drum, bent tube, field erected, cross drum, high static head, and
vertical combustion chamber type designed for stoker [and oil] firing.
Stoker [and oil burner] shall be as specified elsewhere in this section.
Utilize shop assembled components to the maximum extent to facilitate
erection and minimize field labor. Materials shall be as specified herein.
Materials and piping shall meet requirements of ASME BPVC SEC I.
Boiler
shall be a fully erected water tube boiler, including engineering, labor,
supervision, tools, materials, and testing required for a complete
operational unit. Equipment shall include boiler, waterwalls,
refractories, insulation, supporting structural steel, steel casing and
lagging, windbox, ductwork, sootblowers, stoker, [oil burners], ASME
required safety valves, valves and trim, forced draft fan, induced draft
fan and overfire air fan. Boiler design shall be fully integrated with and
coordinated with stoker, [fuel oil burner,] economizer, and forced draft
fan, induced draft fan, and controls specified elsewhere in this section.
Boilers with [welded wall,] [or] [tube and tile] are acceptable.
2.2.1
Boiler shall be capable of operating continuously at the maximum specified
conditions without damage or deterioration to boiler, settings, firing
equipment or auxiliaries. Boiler shall be capable of automatically
controlled operation while burning specified fuel[s].
2.2.1.1
Furnace Heat Input
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NOTE: See NAVFAC Design Manual DM-3.6, Table 12
Stoker Selection Criteria.
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When boiler is operating at a maximum continuous rating, heat input to
furnace shall not exceed either of the following limits:
a.
[310] [362] kW [30,000] [35,000] Btu per hour per cubic meter foot
of furnace volume.
b.
315 kW 100,000 Btu per hour per square meter foot of effective
radiant heating surface.
Combustion gas temperature at furnace exit shall not exceed [1149 degrees C
2100 degrees F when firing oil and] 93 degrees C 200 degrees F below ash
fusion temperature when firing coal.
SECTION 15502N
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