E-
11
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
D(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.
Outer diameter
(mm)
Connection
Torque(kgf•cm)
Flare dimension
(mm)
Flare shape
(mm)
6.35
145~175
8.70~9.10
9.52
333~407
12.80~13.20
12.70
505~615
16.20~16.60
15.88
630~769
19.30~19.70
R 0.4~0.8
90
° ±
2°
45
° ±
2°
In case of needing brazing, you must work with Nitrogen gas blowing.
Uneven Thickness
Cracked
Damaged Surface
Inclined
Correct
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2011-06-23 오전 10:14:32
