43
5.
Check if you flared the pipe correctly (see examples of incorrectly flared pipes below).
Inclined
Correct
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.
Outer diameter
(D mm)
Connection Torque
Flare dimension
(A mm)
Flare shape
(mm)
LHGtDN
/tN
6.35
140~180
14~18
8.70~9.10
R 0.4~0.8
A
D
90° ±2°
45° ±2°
9.52
350~430
34~42
12.80~13.20
12.70
500~620
49~61
16.20~16.60
15.88
690~830
68~82
19.30~19.70
t
Purge pipe work with oxygen free nitrogen while brazing.
CAUTION
ENGLISH
