(4.) Compare the largest differences expressed in percent with
the maximum allowable difference specified.
PART 3
EXECUTION
**************************************************************************
NOTE: Provide an equipment layout on the plans,
which provides the clear space for operation and
maintenance in accordance with NFPA 70 and IEEE C2.
Include requirements for a staging/laydown area for
disassembly or removal and replacement of major
parts of the genset. Additionally, it is advisable
to provide access to remove the unit and/or major
parts of equipment from the room and building either
through doors/passageways or equipment hatches.
**************************************************************************
3.1
GENERAL INSTALLATION
Installation shall provide clear space for operation and maintenance in
accordance with NFPA 70 and IEEE C2. Installation of pipe, duct, conduit,
and ancillary equipment shall be configured to facilitate easy removal and
replacement of major components and parts of the engine-generator set.
3.2
PIPING INSTALLATION
Piping shall be welded. Connections at valves shall be flanged.
Connections at equipment shall be flanged except that connections to the
diesel engine may be threaded if the diesel-engine manufacturers standard
connection is threaded. Except where otherwise specified, welded flanged
fittings shall be utilized to allow for complete dismantling and removal of
each piping system from the facility without disconnecting or removing any
portion of any other system's equipment or piping. Connections to
equipment shall be made with vibration-isolation-type flexible connectors.
Piping and tubing shall be supported and aligned to prevent stressing of
flexible hoses and connectors. Pipes extending through the roof shall be
properly flashed. Piping shall be installed clear of windows, doors and
openings, to permit thermal expansion and contraction without damage to
joints or hangers, and shall be installed with a 13 mm 1/2 inch drain valve
with cap at each low point.
3.2.1
Support
Hangers, inserts, and supports shall be of sufficient size to accommodate
any insulation and shall conform to MSS SP-58 and MSS SP-69. Supports
shall be spaced not more than 2.1 m 7 feet on center for pipes 50 mm 2
inches in diameter or less, not more than 3.6 m 12 feet on center for pipes
larger than 50 mm 2 inches but smaller than 100 mm 4 inches in diameter,
and not more than 5.2 m 17 feet on center for pipes larger than 100 mm 4
inches in diameter. Supports shall be provided at pipe bends or change of
direction.
3.2.1.1
Ceiling and Roof
Exhaust piping shall be supported with appropriately sized Type 41 single
pipe roll and threaded rods; all other piping shall be supported with
appropriately sized Type 1 clevis and threaded rods.
SECTION 16263A
Page 72
Previous Page
