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Installation Procedure
Step 6 Cutting and 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 them with a pipe
cutter, ensuring that the cut edge remains at a 90°
angle to the side of the pipe. Refer to the illustrations
below for examples of edges cut correctly and
incorrectly.
Pipe cutter
90°
90
9
Pipe
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 flare the pipe.
D
A
Pipe
Flare
Outer Diameter (D)
Depth (A)
Ø1/4
Ø3/8
Ø1/2
Ø5/8
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
10
English
Oblique
Rough
Burr
R 0.016 to 0.031 inch
L
Flare
Unit : inch
Flare dimension (L)
0.051
0.34 to 0.36
0.071
0.50 to 0.52
0.079
0.64 to 0.65
0.087
0.76 to 0.78
Inclined
Correct
CAUTION
• If the pipes require brazing ensure that OFN
(Oxygen Free Nitrogen) is flowing through the
system.
• Nitrogen blowing pressure range is 0.02 ~
0.05MPa.
D
Damaged
Cracked
Uneven
Surface
Thickness
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