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5.0
Tubing Repair With Rynglok Unions
5.1
Single Union Repair
Repair of a tubing defect can be made by using a single union fitting
provided that the length of the defect in the tube as shown in Figure
9 is within the limits specified in Table 4.
Figure 9
Defect Length
Table 4
Dash Size
Tube Size
-03
0.1875
-04
0.2500
-05
0.3125
-06
0.3750
-07
0.4375
-08
0.5000
-09
0.5625
-10
0.6250
-11
0.6875
-12
0.7500
-13
0.8125
-14
0.8750
-15
0.9375
-16
1.0000
-20
1.2500
-24
1.5000
5.1.1
Cutting Through Center of Defect
As shown in Figure 10A, a single cut may be made through the
defect and the tube ends prepared as per Paragraph 1.0.
Figure 10A
Cutting through defect
Note: While this method is not considered an ideal repair, it may be
preferred in some circumstances. Please note there is a possibil-
ity of defect propagation, and for this reason, the union should be
positioned equally over the positioning marks of each tube end when
the tube ends are in a "butted" condition since the tube insertion
inspection marks are made from the end of the tube, not from the
ends of the defect.
5.1.2
Figure 10B shows the preferred method for a single fitting repair
where the defect is completely removed, provided the length of the
defect is less than "L Max. " in Table 4. The tube ends should then be
prepared per Paragraph 1.0.
Note: Because of the amount of tubing being removed, this amount
will decrease the amount of tube float available for the installer, i.e.,
if the maximum permissible amount of tubing is cut out, the posi-
tion of the union over the positioning marks will be in the minimum
insertion condition for both fitting ends of the union.
5.2
When the length of the defect exceeds "L Max. " from Table 4,
repairs must be made by cutting out the defective section of tubing,
plus additional tubing as shown in Figure 11. The minimum length of
tubing to be removed is length "M Min. " from Table 5. The removed
tubing must be replaced by an equal or slightly shorter length of
similar tubing, and installed using two Rynglok unions. Prepare each
tube end per Paragraph 1.0.
L Max.
.300
.300
.300
.300
.300
.350
.350
.350
.350
.350
Figure 11
.350
Tube section removal
.350
Note: Rynglok union P/N R80501T-xx, below, is also available for repair
.350
use. This fitting is capable of joining tube sections when a longer span
.400
is required. Use of this option may allow for a single fitting for repair is
.400
some instances.
.400
Table 5
Dash Size
-03
-04
-05
-06
-07
-08
-09
-10
-11
-12
-13
-14
-15
-16
-20
-24
EATON Aerospace Group TF100-67A March 2013
Rynglok Fitting System Installation Guide
Cutting Out Defect
Two Union Repair
Tube Size
0.1875
0.2500
0.3125
0.3750
0.4375
0.5000
0.5625
0.6250
0.6875
0.7500
0.8125
0.8725
0.9375
1.0000
1.2500
1.5000
P/N R80501T
M Min.
2.14
2.38
2.51
2.64
2.77
2.92
3.05
3.18
3.44
3.56
3.71
3.88
3.99
4.15
4.81
5.42
7
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