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Cutting/Flaring the Pipes
16
E-
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.
O
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
Outer diameter
(mm)
R410A clutch type
6.35
9.52
12.70
15.88
5
Check if you flared the pipe correctly. There are some examples of
incorrectly flared pipes below.
X
Inclined
Damaged Surface
6
Outer diameter
Connection
(mm)
Torque (kgf•cm)
6.35
145~175
9.52
333~407
12.70
505~615
15.88
630~769
CAUTION
In case of needing brazing, you must work with Nitrogen gas blowing.
Oblique
Rough
X
X
A
Die
Copper pipe
A(mm)
Conventional flare tool
Flare tool for
Clutch type
0~0.5
1.0~1.5
0~0.5
1.0~1.5
0~0.5
1.0~1.5
0~0.5
1.0~1.5
X
X
Cracked
Flare dimension
(mm)
8.70~9.10
12.80~13.20
16.20~16.60
19.30~19.70
Burr
X
York
Die
Copper pipe
Flare nut
Wing nut type
1.5~2.0
1.5~2.0
1.5~2.0
1.5~2.0
X
Uneven Thickness
Flare shape
R 0.4~0.8
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