8
Figure 7. Example of Pipe Support
1. See Figure 7.
2. When changing directions in a run of tubing, no
corner should be left unsupported. Supports should
be placed a maximum of 2 feet in each direction
from the corner.
Line Insulation
After the nal leak test, refrigerant lines exposed to high
or low ambient conditions should be insulated to reduce
heat loss or gain and prevent the formation of ash gas in
the liquid lines. Suction lines must be insulated with 3/4”
wall Armstrong “Armaex” or equivalent. Liquid lines
Refrigeration Piping
3. Piping attached to a vibrating object (such as a
compressor or compressor base) must be supported in
such a manner that will not restrict the movement of
the vibrating object. Rigid mounting will fatigue the
copper tubing.
4. Do not use short radius ells. Short radius elbows
have points of excessive stress concentration and are
subject to breakage at these points.
5. Thoroughly inspect all piping after the equipment is
in operation and add supports wherever line vibration
is signicantly greater than most of the other piping.
Extra supports are relatively inexpensive as compared
to refrigerant loss.
must be insulated with 1/2-inch wall insulation or better.
The insulation located in outdoor environments should be
protected from UV exposure to prevent deterioration of
insulating value.
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