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Table 3-2-5 Flare and flare nut dimensions for R410A
Table 3-2-3 Dimensions related to flare processing for R410A
d) Flare Processing
Make certain that a clamp bar and copper
pipe have been cleaned.
By means of the clamp bar, perform the flare
processing correctly.
Use either a flare tool for R410A or conven-
tional flare tool.
Flare processing dimensions differ according
to the type of flare tool. When using a
conventional flare tool, be sure to secure
“dimension A” by using a gauge for size
adjustment.
Fig. 3-2-1 Flare processing dimensions
A
ØD
Nominal
diameter
1/4
3/8
1/2
5/8
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
A (mm)
Flare tool for R410A
Conventional flare tool
clutch type
Clutch type Wing nut type
0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 2.0 to 2.5
0 to 0.5 1.0 to 1.5 2.0 to 2.5
Table 3-2-4 Dimensions related to flare processing for R22
Nominal
diameter
1/4
3/8
1/2
5/8
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
A (mm)
Flare tool for R410A
Conventional flare tool
clutch type
Clutch type Wing nut type
0 to 0.5 0.5 to 1.0 1.0 to 1.5
0 to 0.5 0.5 to 1.0 1.0 to 1.5
0 to 0.5 0.5 to 1.0 1.5 to 2.0
0 to 0.5 0.5 to 1.0 1.5 to 2.0
Nominal
diameter
1/4
3/8
1/2
5/8
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
Dimension (mm)
ABCD
9.1 9.2 6.5 13
13.2 13.5 9.7 20
16.6 16.0 12.9 23
19.7 19.0 16.0 25
Flare nut
width
(mm)
17
22
26
29