TCH.1C-27J-2-29JG
2-3.3
TUBING REPAIR PROCEDURES (refer to figure
1.Three basic types of tubing system failures lend
themselves to permanent repair using
PERMASWAGE techniques. The failure types and
recommended repair procedures are the follows:
A.TYPE 1: small hole or short crack in tube
(a)Make one or two cuts as necessary to allow
removal of damaged tube section (if two cuts
are required and the distance between cuts
exceeds 0.299 in (7.6 mm), use repair TYPE 2).
Make cuts only after checking to make sure
enough space in which to operate swage tool.
(b)Replace removed section of tube with a
compatible PERMASWAGE union fitting.
B.TYPE 2: lengthwise crack in tube (crack longer
than 0.299 in (7.6 mm))
(a)Make two cuts to allow removal of damaged
section of tube. Make cuts only after checking
to make sure enough space in which to operate
swage tool.
(b)Use a tube splice and two compatible
PERMASWAGE union fittings to recreate the
section of tubing which was removed.
Assemble these parts into the line being
repaired before you swage the fittings.
(c)Swage each end of fittings.
C.TYPE 3: leaking elbow, tee, or cross.
(a)Cut out defective elbow, tee, or cross. Make
cuts only after checking to make sure enough
space in which to operate swage tool.
D.Swage tube splices to a compatible
PERMASWAGE elbow, tee, or cross fitting. Do this
to re-create section of tubing system which was
removed.
(Cont'd)
29-00-20
2-13