A deliberate and complete installation
plan, including the future addition of similar equipment, is
essential so that all aspects of construction can be reviewed.
The preassembled sections of the
equipment and the manufacturer’s instructions dictate the assembly
sequence and, in most instances, follow a series of steps categorized
as follows:
a) Preconstruction meeting between the
user and the manufacturer
b) Site preparation including grading;
installation of drainage, foundations, and grounding mats; access
roads; and auxiliary power
c) Staging of construction equipment
required during the installation
d) Final alignment and leveling of
foundation supports
e) Receiving, unloading, and storing
GIS equipment
f) On-site assembly
g) Leak testing
h) Connection of control wires
i) Purging and filling with insulating
gas
j) Mechanical or operational testing
k) Dielectric testing
l) Cleanup in accordance with
applicable regulations
m) Energization
Other planning considerations are as
follows:
- A schedule for work crews should be
prepared to provide for more economical use of manpower and to
minimize conflicts caused by limited space. Scheduling may also
result in the release of specialized skills in the shortest possible
time.
- On-site or nearby preassembly areas
should be planned when practical so that specialized equipment can be
set up and repetitive assembly tasks can be performed under
controlled conditions.
- A site layout designating erection
equipment locations should be prepared to allow maximum use of the
equipment with minimum movement. The layout should include details
for each phase of installation so that orderly movement of the
equipment can be maintained.
- The capacity of cranes, hoists,
gas-handling equipment, welding equipment, etc., should be considered
to ensure that the proper size equipment is available for the job.
- Electric power, heat, water, etc.,
should be available at the appropriate time in the installation
sequence.
- The suitability of the site for each
phase of construction and installation should be planned in advance
(e.g., to move about the work area requires proper ground
preparation).
- Cleanliness, in accordance with
manufacturer’s instructions, should be observed at all times.
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