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TECHNICAL PAPERS

Weld Repair of Aged Cr-Mo Steel Piping—A Review of Literature

[+] Author and Article Information
R. Viswanathan

Electric Power Research Institute, 3412 Hillview Avenue, Palo Alto, CA 94304-1395

D. Gandy

Materials and Fossil Application Repair and Replacement Applications Center, Electric Power Research Institute, Charlotte, NC 28262

J. Pressure Vessel Technol 122(1), 76-85 (Oct 26, 1999) (10 pages) doi:10.1115/1.556154 History: Received September 10, 1999; Revised October 26, 1999
Copyright © 2000 by ASME
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References

Viswanathan, R., 1996, “Weldment Related Issues in U.S. Power Plants.” Proceedings of the Symposium on Joining of Metals, Welding Research Institute, Tiruchy, India, pp. 1–23.
Gandy, D. W., and Viswanathan, R., 1999, “Weld Repair of Casings and Piping—An Industry Survey,” ASME J. Pressure Vessel Technol., to be published.
Viswanathan, R., Gandy, D. W., and Findlan, S., 1997, “Performance of Repair Welds on Service-Aged 2-1/4Cr-1Mo Girth Weldments,” ASME J. Pressure Vessel Technol., Nov., pp. 2–9.
Viswanathan,  R., Gandy,  D. W., and Findlan,  S., 1999, “Weld Repair of 2-1/4Cr-1Mo Service-Aged Header Welds,” ASME J. Pressure Vessel Technol., 121, pp. 345–352.
Viswanathan, R., Gandy, D. W., and Findlan, S., 1999, “Weld Repair of 1-1/4Cr-1/2Mo Steel Piping Girth Welds,” ASME J. Pressure Vessel Technol., to be published..
Viswanathan, R., June 1998, Weld Repair of Aged Piping—A Literature Review, EPRI Report, TR-103592-Vol. 7, EPRI. Palo Alto.
Etienne, C. F., Heerings, J. H., and Van Wortel, J. C., 1992, “Weldability and Assessment of Residual Life of Repair Welds in Thick Walled Headers,” VGB Conference, Residual Service Life 1992, Mannheim, 2 , July.
Smith, G. V., 1971, Supplemental Report on the Elevated Temperature Properties of Chromium-Molybdenum Steels, ASTM DS652, American Society for Testing Materials, Philadelphia, PA.
DeWitte, M., and Coussement, C., 1992, “Behavior of 2-1/4C-1Mo Base Material and (Repair) Weldments at High Temperatures,” Creep Characterization, Damage and Life Assessment, D. A. Woodford, C. H. A. Townley and M. Ohnami, eds., ASM International, Metals Park, OH.
Lundin, C. D., and Wang, T., 1989, “Repair Welding of Service Exposed CrMo Steel Weldments,” Weld. Res. Council Bull. 348 , Nov.
Croker, A. B. L., et al., 1997, “Repair Welding of Creep Damaged Steels,” IMMA Conference on Operating Pressure Equipment, Brisbane, Australia, April 7–11, Institute of Metals and Materials Australasia, pp. 209–215.
Arnswald, W., Blum, R., Neubauer, B., and Poulsen, K. E., 1992, “Remaining Life Affected by Repair Welds,” VGB Conference, Residual Service Life, Mannheim, 2 , July.
Westwood, H. J., 1995, “Axial Creep Tests on 1.25Cr-0.5Mo Steam Pipe Weldments, in Materials Aging and Component Life Extension,” V. Bicego, A. Nitta, and R. Viswanathan, eds., Engineering Materials Advisory Services Ltd., West Midlands, UK, pp. 733–743.
Wu,  R., Storesund,  J., and Sandstrom,  R., 1993, “Influence of Postweld Heat Treatment on Creep Properties of 1Cr-0.5Mo Welded Joints,” J. Mater. Sci. Technol., 9, pp. 773–780.
Lundin, C. D., 1996, “Overview of Results from PVRC Programs on Half-Bead/Temper-Bead/Controlled Deposition Techniques for Improvement of Fabrication and Service Performance of Cr-Mo Steels,” Challenges and Solutions in Repair Welding for Power and Process Plants, Proceedings of a Workshop January 31-February 1, WRC Bulletin, 412, June, pp. 16–26.
Shkylyarov, M. J., Schtromberg, Y. Y., and Viswanathan, R., 1997, Rejuvenation of Main Streamline Piping by Reheat Treatment—A Review of Russian Experience, Report TR-106610, Electric Power Research Institute, Palo Alto, CA.

Figures

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Results of isostress rupture tests at 6.5 ksi (45 MPa) on SMAW weld repairs made to ex-service 2-1/4Cr-1Mo steel base metal and weldment
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Estimated remaining life at 1013°F (545°C) and 6.5 ksi (45 MPa) for repair welds to ex-service 2-1/4Cr-1Mo steel base metal and weldment; effect of welding parameters 7
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Stress rupture properties of TC6 superimposed on ASTM LMP rupture plot 3
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Stress versus LMP for rupture correlation for TC6 3
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Estimated remaining life at design conditions of 1000°F (538°C) and 7.8 ksi (54 MPa) (for class 1) for ex-service and repaired 2-1/4Cr-1Mo 3
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Rupture stress versus LMP for repair welds in 2-1/4Cr-1Mo on service-exposed weldment and FRHT base metal, as compared to the wrought annealed 2-1/4Cr-1Mo base metal 10
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Stress rupture properties of TC9 superimposed on ASTM Larson-Miller plot for 2-1/4Cr-1Mo steel 4
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Log stress versus Larson-Miller parameter linear fit for TC9
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Log stress versus Larson-Miller parameter linear fit for TC10
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Estimated remaining life at design conditions of 1000°F (538°C) and 7.8 ksi (54 MPa) for ex-service and weld repair 2-1/4Cr-1Mo. Estimates are based on Figs. 8 and 94.
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Temperature versus time to rupture plots for 2-1/4Cr-1Mo steel ex-service base metal and weld repairs to base metal with high heat input and low heat input 11
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Comparison of repair welds made to ex-service base metal with repair welds to ex-service welds in terms of remaining life at 977°F (525°C) and 6.5 ksi (45 MPa) 7
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Rupture stress versus LMP for repair welds in ex-service 1-1/4Cr-1/2Mo steel 10
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Estimated remaining life at design conditions of 1000°F (538°C) and 6.6 ksi (46 MPa) for ex-service and repaired 1-1/4Cr-1/1Mo 5

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