(unit systems) with connections to the steam distribution and condensate
return systems and auxiliary equipment. Combustion equipment (heat source)
is described in Section [_____]. Each steam boiler shall be capable of
fully independent or simultaneous operation. The normal mode of operation
shall be the same as for the heat source. Combination of unit systems
shall be varied to optimize running times; therefore each unit system shall
provide identical features to provide redundancy and capability for
maintaining continuous operation of the facility at full rated capacity.
PART 2
PRODUCTS
2.1
BOILERS
**************************************************************************
NOTE: Select the appropriate ASME Standard for the
desired pressure class and service specified.
**************************************************************************
Each boiler system shall have the capacity described herein and as shown on
the contract drawings. The equipment design and accessory installations
shall permit accessibility for maintenance and service. Boilers shall be
designed for a maximum allowable working pressure of [_____] kPa psig with
an operating pressure of [_____] kPa psig.. Design conditions shall be as
follows:
a.
Rated capacity, [_____] kg/hour pounds/hour.
b.
Steam outlet temperature, [_____] degrees C degrees F.
c.
Site elevation, [_____] meters feet.
d.
Ambient air temperatures, [_____] to [_____] degrees C [_____] to
[_____] degrees F.
e.
Reference air temperature, 27 degrees C 80 degrees F.
The boiler shall be capable of operating continuously at maximum specified
capacity without damage or deterioration to the boiler, setting, heat
source equipment, or auxiliaries. The boiler shall be capable of
automatically controlled operation while coupled to the heat source.
Design of the equipment shall be in accordance with the latest ASME
Standards; ASME BPVC SEC I, ASME BPVC SEC IV, and ASME BPVC SEC VIII D1.
Certification of such compliance shall be evidenced by applicable "P" forms
before acceptance of the facility by the Government. Boiler piping shall
be provided under ASME B31.1. Each boiler shall be equipped with an
[economizer] [air preheater]. Boiler unit or heat recovery section shall
be a standard part of a steam generation system package closely coupled to
the combustion equipment described in Section [_____].
2.1.1
Capacity
Rated capacity shall be the capacity at which the boilers will operate
continuously without exceeding the specified boiler heat transfer rates,
and boiler exit temperature. Boiler auxiliaries including fans, motors,
drives, and similar equipment shall be provided with at least 10 percent
excess capacity to allow for field variations in settings and to compensate
for any unforeseen increases in pressure losses in appurtenant piping and
ductwork.
SECTION 15846A
Page 17
Previous Page
