22
Cutting/aring 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
R22 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
15.88/19.05
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)
6.35 145~175
9.52 333~407
12.70 505~615
15.88 630~769
19.05 990~1210
Inclined Damaged Surface Cracked Uneven Thickness
In case of needing brazing, you must work with Nitrogen gas blowing.
CAUTION
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