9 Piping work and
refrigerant charge
TCGB0070 rev.3 - 04/2012
119
9
Dimensions of the flared pipe
units: mm (inch)
Nominal
diameter
External
diameter
A
Ø
+0/-0.4
(1/4)
6.35
9.1
(3/8)
9.53
13.2
(1/2)
12.7
16.6
(5/8)
15.88
19.7
Thickness of the copper pipes
units: mm (inch)
Nominal
diameter
External
diameter
Thickness
(1/4)
6.35
0.80
(3/8)
9.53
0.80
(1/2)
12.7
0.80
(5/8)
15.88
1.00
Dimensions of the flare nut
units: mm (inch)
Nominal
diameter
External
diameter
B
(1/4)
6.35
17
(3/8)
9.53
22
(1/2)
12.7
26
(5/8)
15.88
29
Flare nuts tightening torque
Always use two wrenches or fix spanners when tightening the Flare Nuts on the refrigerent pipes.
If any failure occurs during this process the result could be pipe damage or refrigerant leak.
unit: N.m
Pipe size
Tightening torque
Ø 6.35 mm
20
Ø 9.53 mm
40
Ø 12.7 mm
60
Ø 15.88 mm
80
