Development of automated welding process for field fabrication of thick walled pressure vessels. Fourth quarter technical progress report for period ending September 30, 1979 Page: 1 of 40
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TECHNICAL PROGRESS REPORT
not necessarily constitute or imply its endorsement, recomrr
S,a,es Government or any agency thereof. The views and opinic
\ necessarily state or reflect those of the United States Government
This book was prepared as an account of work sponsored by an agency of the United States Government..
Neither the United States Government nor any agency thereof, nor any of their employees, makes any
warranty, express or implied, or assumes any legal liability or responsibility for the accuracy,
completeness, or usefulness of any information, apparatus, product, or process disclosed, or
represents that its use would not infringe privately owned rights. Reference herein to any specific
commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does
not necessarily constitute or imply its endorsement, recommendation nr f.-n/nr;™
, , --------V. , Wl VIIICI Wide, U<Jc5
not necessarily constitute or imply its endorsement, recommendation, or favoring by the United
States Government or any agency thereof. The views and opinions of authors expressed herein do not
or process disclosed, or
nee herein to any specific
necessarily state or reflect those of the United States Government or any agency thereof.
Contract No. EF-78-C-01-2771
Foia-PerTotfr—F¥-79, Fowtli_Qua-£fcfi*i;, Ending September 30, 1979
The following activity has been accomplished during the fourth quarter of
1.1 Project planning reported complete in second quarterly report.
1.2 The Welding Process Review is draft-typed and under audit - it will be
published during the next quarter. There is not a broad base of process
information available using A387-22-2. However, ASTM A542 (similar
except for higher strength) has extensive data available. As a result,
the review will encompass the (2 1/4 Cr - 1 Mo) A542. It is to be noted
that increased strength influences weld metal selection, residual stress
levels and stress relief temperatures.
2.2 Facility Rearrangement reported complete in first quarterly report.
2.3/ Plate procurement as previously reported, has been seriously delayed by
3.1 the difficulty of finding a vendor who would deliver plate for the
contract,to SA 387-22-2 and Section VII1-2 heat treatments. During the
past quarter an overseas vendor was found who was willing to quote to
the above requirements. A P.0, has been initiated and is awaiting DOE
approval. Where the resultant late delivery of this pedigree plate
affects the Planned Completion Date of a task, it is noted.
2.4 Modifications of torch design* reported complete in third quarterly
report. A special gas sampling tube - using the configuration of the
welding torch and electrode - has been built to evaluate the optimization
of shielding effectiveness in the required groove positions.
2.5 The oscillation aspect of Process Mechanical Control is under study.
Preliminary conclusions are that (high frequency - minimal displacement)
oscillation may be an asset. However, if 8" deep single preps are used,
accessibility may be limited in the bottom portion of such a joint.
Completion of this sub-task will be extended (6) months as a result of
late plate delivery of sub-task 2.3.
2.6/ Evaluation of a more restricted joint design (in 2G position) is continu-
3.7 ing with included angle as the present primary variable. Completion of
this sub-task will be extended (6) months as a result of late plate
delivery of sub-task 2.3.
2.7/ FILLER WIRE PROCUREMENT is near completion. The remaining third of three
3.5 heats is ordered,- its delivery is eminent. This item is not on the
Independent W^ narrow groove torch design under separate W funding - same
design is being built now from W design for DOE.
DISTRIBUTION OF TFIS FOGTB
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Development of automated welding process for field fabrication of thick walled pressure vessels. Fourth quarter technical progress report for period ending September 30, 1979, report, January 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1093454/m1/1/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.