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TECHNICAL PAPERS

An Improved Analytical Method for Life Prediction of Bolting

[+] Author and Article Information
F. V. Ellis

Tordonato Energy Consultants, Inc., Chattanooga, TN 37406e-mail: tectnellis@aol.com

D. R. Sielski

Tennessee Valley Authority, Chattanooga, TN 37402e-mail: drsielski@tva.gov

R. Viswanathan

Electric Power Research Institute, Palo Alto, CA 94394e-mail: rviswana@epri.com

J. Pressure Vessel Technol 123(1), 70-74 (Oct 23, 2000) (5 pages) doi:10.1115/1.1344240 History: Received January 01, 2000; Revised October 23, 2000
Copyright © 2001 by ASME
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References

Branch, G. D., Draper, J. H. M., Hodges, N. W., Marriott, J. B., Murphy, M. C., Smith, A. I., and Toft, L. H., 1973, “High Temperature Bolts for Steam Power Plant,” International Conference on Creep and Fatigue in Elevated Temperature Applications, Proc. Inst. Mech. Eng., pp. 192.1–192.9.
Bolton, J., 1995, “Design Considerations for High Temperature Bolting,” Performance of Bolting Materials in High Temperature Plant Applications, The Institute of Materials, London, UK, pp. 1–14.
Ellis, F. V., Sielski, D. R., and Viswanathan, R., 1998, “Guidelines for Life Assessment of High Temperature Bolting,” Fitness-for-Service Evaluations in Petroleum and Fossil Power Plants, ASME, New York, NY, pp. 119–127.
EPRI, 1999, High Temperature Bolting Life Prediction and Life Assessment, TR-113529, EPRI, Palo Alto, CA.
Ellis, F. V., and Sielski, D. R., 2000, “Mechanical Properties of Ex-Service Bolts,” Service Experience and Fitness-for-Service in Power and Petroleum Processing, ASME, New York, NY, pp. 311–318.
Ellis, F. V., Tordonato, S., and Viswanathan, R., 1998, “Prediction of Cyclic Stress Relaxation for 1CrMoVTiB,” Fatigue, Fracture, and High Temperature Design Methods in Pressure Vessels and Piping, ASME, New York NY, pp. 175–182.
Ellis, F. V., and Tordonato, S., 1999, “Cálculation of Stress Relaxation Properties for Type 422 Stainless Steel,” Fracture Mechanics: Design and Analysis of Pressure Vessels, Heat Exchangers, and Piping; and Fitness for Service. ASME, New York NY, pp. 395–403.
Sielski, D. R., and Steakley, M. F., 1998, Unpublished Research, Tennessee Valley Authority, Chattanooga, TN.
de Witte, M., and Stubbe, J., 1985, “Failure Mechanisms and Practical Approach for the Following Up of High Temperature Turbine Bolts,” Proc. International Conference on Remanent Life: Assessment and Extension, EUROTEST, Brussels, Belgium.
Ellis, F. V., Roberts, B. W., Steakley, M. F., and Hilton, S. O., 1992, “Application of Creep Swelling Data In Life Assessment of High Temperature Piping,” Creep:Characterization, Damage and Life Assessment, ASM International, Materials Park, OH, pp. 481–489.
NRIM, 1997, “Data Sheets on The Elevated-Temperature Stress Relaxation Properties of 1Cr-0.5Mo-0.25V Steel and 12Cr-1Mo-1W-0.25V Steel Bolting Materials for High Temperature Service,” NRIM Creep Data Sheet No. 44, National Research Institute for Metals, Tokyo, Japan.
General Electric, 1979, “Valve Studs—Tightening, Inspection and Replacement Recommendations,” TIL-891.
Tanaka,  C., and Ohba,  T., 1984, “Analysis of Reloading Stress Relaxation Behavior with Specified Reloading Time Intervals for High Temperature Bolting Steels,” Trans. Nat. Res. Inst. Metals, 26, No. 1, pp. 1–20.
Townsend, R. D., 1995, “Performance of High Temperature Bolting,” Performance of Bolting Materials in High Temperature Plant Applications, The Institute of Materials, London, UK, pp. 15–40.
Mayer, K. H., and Konig, H., 1992, “New Materials for Advanced Steam Turbines; Volume 4: Testing of Superalloy Bolt Materials for Advanced Power Plants,” EPRI TR-100979, Vol. 4, RP1403-15 Final Report, EPRI, Palo Alto, CA.
Ellis, F. V., 2000, “Heat-to-Heat Variability in Stress Relaxation of Type 422,” Fitness for Service, Stress Classification and Expansion Joint Design-2000, ASME, New York, NY, pp. 43–52.

Figures

Grahic Jump Location
Photograph of HP turbine inner cylinder studs at Plant A
Grahic Jump Location
Accumulated inelastic strain versus bolt number for HP turbine inner cylinder studs at Plant A
Grahic Jump Location
Schematic drawing showing the thermocouple arrangement for stop valve studs at Plant B
Grahic Jump Location
Measured stretch versus required stretch for HP turbine outer cylinder bolts

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