E-
10
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.
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.
Outer diameter (D)
Depth (A)
6.35 mm (1/4”)
9.52 mm (3/8”)
12.70 mm (1/2”)
15.88 mm (5/8”)
19.05 mm (3/4”)
0.051 inch
0.070 inch
0.078 inch
0.086 inch
0.086 inch
5
Check that the flaring is correct, referring to the illustrations below for
examples of incorrect flaring.
6
Align the pipes and tighten the flare nuts first manually and then with
a torque wrench, applying the following torque.
CAUTION
In case of welding the pipe, you must weld with nitrogen gas blowing.
Oblique
Rough
Burr
Uneven Thickness
Cracked
Damaged Surface
Inclined
Valve
Flare nut
Valve cap
Pressure port cap
Valve needle
Pressure port
Wrench(inch)
ft.lb
Wrench(inch)
ft.lb
Wrench(inch)
ft.lb
Wrench(inch)
ft.lb
Wrench(inch)
ft.lb
1/4"
0.67
13.2
0.91
14.8
0.7
11.8~13.3 Allen(hex.) 0.2
6.64
-
0.25
3/8"
0.87
31.0
0.91
14.8
0.7
11.8~13.3 Allen(hex.) 0.2
6.64
-
0.25
1/2"
1.02
40.6
1.14
29.5
0.7
11.8~13.3 Allen(hex.) 0.2
9.59
-
0.25
5/8"
1.14
48.0
1.14
29.5
0.7
11.8~13.3 Allen(hex.) 0.2
9.59
-
0.25
3/4"
1.42
73.6
1.5
29.5
0.7
11.8~13.3 Allen(hex.) 0.2
9.59
-
0.25
Air Marketing Group LLC
141 Kinderkamack Rd, Park Ridge, NJ 07656 Tel: 201-782-1782 Fax: 201-782-1783 Web: www.amgair.com Email: [email protected]