11
A
Cutting/flaring the pipes
1
Make sure that you prepared the required tools.
(pipe cutter, reamer, flaring tool and pipe holder)
2
If you want to shorten the pipe, cut it using a pipe cutter ensuring that
the cut edge remains at 90° with the side of the pipe. There are some
examples of correctly and incorrectly cut edges below.
Oblique
Rough
Burr
3
To prevent a gas leak, remove all burrs at the cut edge of the pipe using a
reamer.
4
Carry out flaring work using flaring tool as shown below.
Flaring tool
Clutch type
Wing nut type
A
Die
Copper pipe
York
Die
Copper
pipe
Flare nut
Outer diameter
(mm)
A(mm)
Flare tool for
R410A clutch type
Conventional flare tool
Clutch type
Wing nut type
6.35
0~0.5
1.0~1.5
1.5~2.0
9.52
0~0.5
1.0~1.5
1.5~2.0
12.70
0~0.5
1.0~1.5
1.5~2.0
15.88
0~0.5
1.0~1.5
1.5~2.0
5
Check if you flared the pipe correctly. There are some examples of
incorrectly flared pipes below.
6
Align the pipes and tighten the flare nuts first manually and then with a
torque wrench, applying the following torque.
Inclined Damaged Surface Cracked Uneven Thickness
In case of needing brazing, you must work with Nitrogen gas blowing.
Outer diameter
(mm)
Connection Torque Flare dimension
(mm)
Flare shape
(mm)
kgf•cm
N•m
6.35
140~180 14~18
8.70~9.10
R 0.4~0.8
90° ±
2°
45°
±
2°
9.52
350~430 34~42
12.80~13.20
12.70
500~620 49~61
16.20~16.60
15.88
690~830 68~82
19.30~19.70
