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Cutting/flaring the pipes
1. Make sure that you have the required tools available (pipe cutter, reamer, flaring tool and pipe holder).
2. If you wish to shorten the pipes, cut it with a pipe cutter, taking care to ensure that the cut edge remains at a 90° angle
with the side of the pipe. Refer to the illustrations below for examples of edges cut correctly and incorrectly.
90°
Oblique
Rough
Burr
3. To prevent any gas from leaking out, remove all burrs at the cut edge of the pipe, using a reamer.
4. Slide a flare nut on to the pipe and modify the flare.
Pipe
Flare
90°± 2°
45°±2°
R 0.4
~0.8
Outer Diameter (D)
Depth (A)
Flare dimension (B)
ø6.35 mm(1/4")
1.3 mm(0.051")
8.7 - 9.1 mm(0.3425'' - 0.3583'')
ø9.52 mm(3/8")
1.8 mm(0.071")
12.8 - 13.2 mm(0.5039'' - 0.5197'')
ø12.70 mm(1/2")
2.0 mm(0.079")
16.2 - 16.6 mm(0.6378'' - 0.6535'')
ø15.88 mm(5/8")
2.2 mm(0.087")
19.3 - 19.7 mm(0.7598'' - 0.7756'')
5. Check that the flaring is correct, referring to the illustrations below for examples of incorrect flaring.
Flare nut
Connecting pipe
Indoor outlet pipe
Inclined
Damaged
surface
Cracked
Uneven
thickness
6. Align the pipes and tighten the flare nuts first manually and then with a torque wrench, applying the following torque.
Valve
Flare nut
Valve cap
Pressure port cap
Valve needle
Pressure port
mm(inch)
Wrench
[mm(inch)]
N•m
Wrench
[mm(inch)]
N•m
Wrench
[mm(inch)]
N•m
Wrench
[mm(inch)]
N•m
Wrench
[mm(inch)]
N•m
6.35(1/4)
17(0.67)
18
23(0.90)
20
18(0.71)
16~18 Allen (hex.) 5(0.20)
9
-
0.34
9.52(3/8)
22(0.87)
42
23(0.90)
20
18(0.71)
16~18 Allen (hex.) 5(0.20)
9
-
0.34
12.70(1/2)
26(1.02)
55
29(1.14)
40
18(0.71)
16~18 Allen (hex.) 5(0.20)
13
-
0.34
15.88(5/8)
29(1.14)
65
29(1.14)
40
18(0.71)
16~18 Allen (hex.) 5(0.20)
13
-
0.34
19.05(3/4)
36(1.42)
100
38(1.50)
40
18(0.71)
16~18 Allen (hex.) 5(0.20)
13
-
0.34
In case of welding the pipe, you must weld with nitrogen gas blowing.
CAUTION
FJM IDU-PH_Cassette type_IM_31595A-04_EN.indd 13
2015-11-16 오후 4:52:22
