capable of delivering, at a pressure of [_____] Pa psig, not less than
0.00472 standard cubic meters/second 10 scfm dry air at an atmospheric dew
point of -23 degrees C -10 degrees F with entering air at 35 degrees C 95
degrees F, saturated. The air compressor unit shall be sized to run not
more than 60 percent of the time when all controls are in service. The air
compressor unit shall be complete with all necessary accessories including
automatic pressure control equipment, relief valves, check valves, air
filters, moisture traps, and a receiver with ample capacity for emergency
operation of the controls for 15 minutes after compressor shutdown. The
receiver shall be of vertical construction, in accordance, ASME BPVC SEC
VIII D1 with relief valve and drain fittings. The air dryer shall be a
self-contained, refrigerated type, complete with refrigeration compressor,
heat exchanger, automatic controls, and moisture removal trap, or a
regenerative desiccant type dryer, as required. The refrigeration unit
shall be the hermetically-sealed type capable of continuous operation at
maximum load conditions.
2.26
PIPING
Unless otherwise specified herein, pipe and fittings shall conform to ASME
B31.1.
2.26.1
Pipe
Pipe material shall be as specified in TABLE I.
2.26.2
Fittings
Pipe fittings shall be as specified in TABLE II.
2.26.3
Nipples
Nipples shall conform to ASTM A 733, Type I or II, as required to match
adjacent piping.
2.26.4
Unions
Unions shall conform to ASME B16.39, type as required to match adjacent
piping.
2.26.5
Pipe Threads
Pipe threads shall conform to ASME B1.20.1, right- or left-hand tapered
thread as required.
2.26.6
Expansion Joints
2.26.6.1
Guided, Slip-Tube Type Expansion Joints
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NOTE: Wherever possible, provision for expansion of
steam supply and return pipes will be made by
changes in the direction of the run of the pipe or
by field-fabricated expansion bends. If expansion
joints are not required, applicable paragraphs will
be deleted. Where space limitations prevent such
provisions for expansion, expansion joints will be
installed.
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SECTION 15559A
Page 73
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