22
●
Piping wall thickness and material
Piping specification is as shown in below table:
(mm)
Outer
Diameter of
Piping
R410A
Wall
Thickness
Hardness Grade
6.35mm
0.8
O material
9.52mm
0.8
O material
12.7mm
0.8
O material
15.88mm
1
O material
19.05mm
1
1 / 2H material
22.2mm
1
1 / 2H material
25.4mm
1
1 / 2H material
28.58mm
1
1 / 2H material
31.75mm
1.1
1 / 2H material
38.1mm
1.35
1 / 2H material
44.45mm
1.55
1 / 2H material
50.8mm
2
1 / 2H material
6.2 Flare and Joints
●
Flare size
Flare as shown in the table below:
90
0
+ 2
0
45
0
+ 2
0
0.4 ~ 0.8R
ØA
Ød
(mm)
Diameter
(Ød)
A
+0
-0.4
R410A
6.35
9.1
9.52
13.2
12.7
16.6
15.88
19.7
19.05
(*)
(*)It is impossible to perform the
flaring work with 1/2H material.
In this case, use an accessory
pipe (with a flare).
●
Joint selection
If you use 1/2H material pipe, it cannot be flared. In this case, the joints shown in the table below can
be used.
Minimum wall thickness
of the joint (mm)
Flare nut Size B
(mm)
B
Flare nut
R410A
R410A
Ø 6.35
0.5
Ø 6.35
17
Ø 9.52
0.6
Ø 9.52
22
Ø 12.7
0.7
Ø 12.7
26
Ø 15.88
0.8
Ø 15.88
29
Ø 19.05
0.8
Ø 19.05
36
Ø 22.2
0.9
Ø 25.4
0.95
Ø 28.58
1.0
Ø 31.75
1.1
Ø 38.1
1.35
Ø 41.3
1.45
Ø 44.45
1.55
Ø 50.8
2.0
Ø 53.98
2.0
