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6-2-2. Processing of piping materials
(1) Flare processing procedures and precautions
Fig. 6-2-1 Flare processing dimensions
Table 6-2-3 Dimensions related to flare processing for R410A or R32 / R22
Table 6-2-4 Flare and flare nut dimensions for R410A or R32
Table 6-2-5 Flare and flare nut dimensions for R22
Fig. 6-2-2 Relations between flare nut and flare seal surface
Nominal
diameter
Outer diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool for
R410A, R22
clutch type
Conventional flare tool
(R410A or R32)
Conventional flare tool
(R22)
Clutch type Wing nut type Clutch type Wing nut type
6.4 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0 0.5 to 1.0 1.0 to 1.5
12.7 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5 0.5 to 1.0 1.5 to 2.0
15.9 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5 0.5 to 1.0 1.5 to 2.0
Nominal diameter
Outer diameter
(mm)
Thickness
(mm)
Dimension (mm)
Flare nut width
(mm)
A B C D
6.4 0.8 9.1 9.2 6.5 13 17
12.7 0.8 16.6 16.0 12.9 23 26
15.9 1.0 19.7 19.0 16.0 25 29
Nominal diameter
Outer diameter
(mm)
Thickness
(mm)
Dimension (mm)
Flare nut width
(mm)
A B C D
6.4 0.8 9.1 9.2 6.5 13 17
12.7 0.8 16.2 16.0 12.9 20 24
15.9 1.0 19.4 19.0 16.0 23 27
A
DIA D
CA B
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