shall operate at a pressure of approximately 35 kPa
(5 psig). The steam shall be supplied from a
central steam plant and shall be reduced to the
specified gauge pressure.
(1) Vacuum-return system: Condensate from the
heating system shall be returned by vacuum to the
vacuum pumping unit which will pump the condensate
back to the central steam plant.
(2) Gravity-return system: Condensate from the
heating system shall be returned by gravity to a
condensate pumping unit which will pump the
condensate back to the central steam plant.
b. Steam utility systems: Steam utility systems
shall be of the two-pipe gravity-return type with
steam supplied from a central plant at a gauge
pressure of approximately 690 kPa (100 psig) and
reduced to a gauge pressure of approximately 275 kPa
(40 psig). The steam shall be supplied to
steam-using equipment without further reduction in
pressure and the condensate shall return through
medium-pressure traps, flash tanks, and a condensate
pumping unit to the central system.
**************************************************************************
1.1
REFERENCES
**************************************************************************
NOTE: Issue (date) of references included in
project specifications need not be more current than
provided by the latest guide specification. Use of
SpecsIntact automated reference checking is
recommended for projects based on older guide
specifications.
**************************************************************************
The publications listed below form a part of this specification to the
extent referenced. The publications are referred to within the text by the
basic designation only.
AIR-CONDITIONING AND REFRIGERATION INSTITUTE (ARI)
ARI 850
(1993) Commercial and Industrial Air
Filter Equipment
AMERICAN WATER WORKS ASSOCIATION(AWWA)
AWWA C606
(2004) Grooved and Shouldered Joints
AMERICAN WELDING SOCIETY (AWS)
AWS A5.8
(1992) Filler Metals for Brazing and Braze
Welding
AWS D1.1/D1.1M
(2004) Structural Welding Code - Steel
SECTION 15562A
Page 6
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