PIN
RING
TUBE WEE
Fig. 15
-
Elliott Tube Plug
RETUBING (See Table 6)
-
When retubing is to be
done, obtain the service of qualified personnel, ex-
perienced in boiler maintenance and repair. Most
standard procedures can be followed, except that for the
tubes in the 30GT coolers, a
5yc
crush is recommended
in setting torque (5!8-in. [15.87-mm] diameter tubes
are used in the 30GT cooler).
Example:
a. Tube sheet hole diameter . . . . .0.630 in. (16.00 mm)
b. Tube QD . . . . .
+.
“.
. . .
*.
s
-. . .Q,625 in, (15.87 mm)
c. Cleasance (a minus b) . . . . . .
I
L
.U.U05
in. (0. I3 mm)
d. Tube ID before rolling
(use Elliott tube gage) . . . . . . . , * 0.549
ip.
(13.9 mm)
e.
S;%
of twice the wall thickness
(S9$s
of b minus
d)
. . . . . . . . . = , .0.004 in. (0.10 mm)
f. Tube ID after rolling
g,
-t
d
*
e)-**-...*
.
%.
. . .
.OS%
in.
(f4.2
mm)
NOTE: The tubes next to the gasket webs must be
flush with the tube sheet (both ends).
Table 6
-
Tubes and Plugs
~~
Wall Thickness, in.
(mmj
Plain End
Fhwwl
Section
COMPONENTS FOR
PLUGGING
For Tubes
Brass Pin
Brass Ring
Fot
Holss
Without
Tubes
Brass Pin
Brass Ring
Loctite
Locqquic
0.038 (0.97)
0.025 PJ.64’)
PART NC?.
853103-500t
853002~559t
853103t
853002-631
t
No.
75f
“N”I
*Check with thickness gage (23 ga).
tC$l,er directly from Elliott Company, Lagunda Operation, Springfield,
$Can
be obtained locally.
15
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