ENGINEERING OF INSULATION
20
1. Ins ula tion of ref rig er an t p ip e
1.1 Operational procedu re of refrigera nt pipe insulation
Cut the suitable
pipe
→
insulation
(
exc
ept joint section
)
→
flare
the
pipe
→
piping
layout and
connection
→
vacuum drying
→
insulate the
joint parts
1.2 Purpose of refrigerant pipe insulation
During
operation
,
temperature
of
gas pipe and
liquid pipe shall
be
over
-
heating
or
over
-cooling
extremely
.
Therefore
,
it
is
necessary to
carry out insulation; otherwise
it
shall
debase
the
performance
of unit
and
burn
compressor
.
Gas pipe temperature
is
very low during cooling
.
If
insulation
is
not enough
,
it shall form
dew
and
cause
leakage
.
Temperature
of
gas pipe is
very
high
(
generally 50
-
100
℃
)
during
heating
.
Insulation
work must
be
carried
out
to
prevent
hurt by
carelessness touching
.
1.3 Insulat ion material selection for refrige rant pipe
The
burning
performance
should
over 120
℃
According
to
the
local
law
to
choose
insulation
materials
The
thickness of insulation layer
shall
be
above
10mm
.
If in
hot
or wet
environment place
,
the
layer
of
insulation should
be
thicker
accordingly
.
1.4 Installation highlights of insulation construction
Gas
pipe
and
liquid
pipe
shall
be
insulated
separately
,
if
the gas pipe and
liquid
pipe
were insulated
together
;
it will
decrease the
performance of air
conditioner
.
Liquid
pipe
Insulation meterial
Gas
pipe
The
insulation
material
at
the
joint pipe
shall
be 5
~
10cm
longer
than
the
gap
of
the
insulation
material
.
The
insulation
material
at the joint pipe
shall
be
inserted
into
the
gap
of
the
insulation
material
.
The
insulation
material
at
the
joint pipe
shall
be
banded
to
the
gap
pipe
and
liquid
pipe
tightly
.
The
linking
part
should
be use glue
to
paste
together
Be
sure
not
bind
the insulation
material
over
-
tight
,
it
may
extrude out the air
in the material
to cause
bad
insulation
and
cause
easy aging of the
material
.
2. Insul ation of drai nage pipe
2.1 Operational procedu re of refrigera nt pipe insulation
Select
the
suitable
pipe
→
insulation
(
exc
ept joint section
)
→
piping
layout and connection
→
drainage
test
→
insulate
the
joint
parts
2.2 Purpose of drainage pipe insulation
The
temperature of
condensate
drainage
water is very low. If insulation is
not enough
,
it shall form
dew
and
cause
leakage to
damage the
house
decoration
.
