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ANP PROJECT PROGRESS REPORT
final passes, and micrometer measurements were
taken after the final pass had been made. The
shrinkage measurements and welding data are
presented in Table 3.4.5; the results of tests la,
107, 108, and 109 were in close agreement,
although two different welding operators made the
welds.
The welding procedure used for these tests of
plates was then used for test welds of hoops.
For these tests ?' . lnconel plates, 6 x 138 in.,
were bent into tin oops approximately 44 in. in
diameter. One edge of each hoop had a 50-deg
bevel and a t6-in. land. The hoops were placed
on the weld-positioner bed in a horizontal plane
in the manner shown in Fig. 3.4.16. Tool-steel
spacers, 4 in. long and \ in. thick,-shown in
Fig. 3.4.17, were placed between the beveled
edges at 6-in. intervals to maintain the root gap.
Large C-clamps were used to draw the two hoops
tightly against the spacers. Smaller C-clamps
were halved and tacked to the bottom hoops to
aid in the alignment of the upper hoop. Asbestos
string was used to seal the gaps between the
spacers prior to tacking. The area behind the
root gap was sealed with a cover formed from
0.010-in. annealed brass sheet and masking tape,
and the enclosed space was purged for 30 min
prior to tacking, Alignment was checked con- -
stantly as -the tack welds were placed between
the spacers. After removal of the tool-steel
spacers, the root pass was deposited. No dressing
of the land or feathering of the tack welds was
permitted prior to the root-pass deposition.
After completion of the root pass, the weld was
wire brushed and the five final weld passes were
deposited by using the sequence described in
Fig. 3.4.14. For these welds, two welders worked
180-deg apart around the hoop while the positioner
was slowly rotated. As shown in Fig. 3.4.18,
four dial gages were used to record the shrinkages
of the final passes. The welders worked on a
15-min-work, 5-min-rest cycle. A typical plot of
dial-gage readings is shown in Fig. 3.4.19. The
micrometer and dial-gage measurements obtained
are summarized in Table 3.4.6.
TABLE 3.45. WELDING CONDITIONS AND RESULTS OF SHRINKAGE MEASUREMENTS
ON WELDS OF INCONEL PLATE
Test Welder Time Welding Current Total Shrinkage (in,) Diol-Gage Shrinkage' (in.)
No. No.
Required
(min)
Rad Used
(in.)
Used
(amp)
Maximum Minimum Average Maximum Minimum Average
100 1
101 1
102t' 1
106 1
107 1
108 2
109 2
72
66
74
61
60
79
64
213.5 70 (root) 0.1 97
105-110
231 70 (root) 0.1 67
1 05-1 10
180 80 (root) 0.1 42
105-110
198 80 (root) 0.157
105-1 10
226 75-80 (root) 0.148
105-1 10
231 80 (root) 0.157
1 05- 1 1 0
236 80 (root) 0.1 54
105-1 10
0.123 0.126 0.058 0.048
0.130 0.146 0.070 0.050
0.114 0.130 0.081 0.079
0.121 0.141 0.092 0.082
0.132 0.139 0.104 0.096
0.106 0.138 0.103 0.093
0.104 0.136 0.102 0.092
*Measurements made on last five of the six passes;dial-goge readings on tests 100 and 101 are erroneous because
the dial-gage actuating arm slipped during the test.
188
**Test 102 plates were machined with an 80-deg included angle rather thon a 100-deg included angle.
0.053
0.060
0.080
0.087
0.1 00
0.098
0.097
s
.
c
*