Abstract
The nature of and reasons for weld joint failure in the hot reheat (HRH) steam lines of an 800-MW power unit are analyzed. It is shown that the weld joint destruction happened in the softened area and is typical for the weld joints operating for a long time under creep conditions. Numerical simulation demonstrated that the weld joint exhausted its lifetime due to the impact of equivalent stresses that exceeded design values, this being the reason for the failure.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A.E. Anokhov and P. M. Korol’kov, Welding and Heat-Treatment in Power Engineering (Ekotekhnologiya, Kiev, 2006) [in Russian].
V. I. Kumanin, L. A. Kovalev and C. V. Alekseev, Metal Longevity under Creep Conditions (Metallurgiya, Moscow, 1988) [in Russian]
D. J. Gooch, “Plant-Life Extension-Remainent-Life Assessment of High-Temperature Components,” Power Engng., No. 6, 1062–1071 (1988).
TU (Russian Technical Specification) 108-874-95 Centrifugal-Cast Tubes Made of the Steel 15Kh1M1F, (TsNIITmash, Moscow, 1995), [in Russian].
TU (Technical Specification) 14-3P-55-2001 The Seamless Steel Tubes Intended for Steam Boilers and Ducts, (TsNIITmash, Moscow, 2001), [in Russian].
P. A. Antikain, “The Long-Term Strength of the Metal of a Steam Pipe after Lengthy Operation as a Measure of Its Operating Reliability,” Teploenergetika, No. 5, 64–67 (1999) [Therm. Eng., No. 5, 413–416 (1999)].
RD 153-34.1-003-01. Welding, HeatTtreatment and Control of the Tube Systems of Boilers and Mains During Assembling and Repair of Power Equipment (RTM-1s) (BIO OBT, Moscow, 2001) [in Russian].
RD 10-577-03. Standard Instruction for Metal Control and Life-Time Prolongation of the Main Elements of Boilers, Turbines and Mains of Thermal Power Plant (Gosgortekhnadzor RF, Moscow, 2003) [in Russian].
RD 10-249-98. Codes of Strength Design of Stationary Boilers and Steam and Hot Water Lines, (Gosgortekhnadzor RF, Moscow, 2002) [in Russian].
MR (Recommendations) 125-02-95 Rules for Constructing Calculation Schemes and Determination of Loading Parameters of Structural Elements with Found Defects (TsNIITmash, Moscow, 1995) [in Russian].
E. A. Grin’ and V. A. Sarkisyan, “Long-Term Static Resistance to Cracking of the Basic Metal and Weld Joint of the Centrifugal-Cast Tubes made of 15Kh1M1F Steel” in Proceedings of the Scientific Seminar “Repairing and Restoration of Power Plants Facilities Securing the Guaranted Lifetime” (St. Petersburg, 1995).
Author information
Authors and Affiliations
Additional information
Original Russian Text © A.E. Anokhov, E.A. Grin’, T.V. Perevezentseva, I.V. Fedina, 2009, published in Teploenergetika.
Rights and permissions
About this article
Cite this article
Anokhov, A.E., Grin’, E.A., Perevezentseva, T.V. et al. Reasons for and nature of weld joints failure in hot reheat steam lines of 800-MW power units. Therm. Eng. 56, 113–119 (2009). https://doi.org/10.1134/S0040601509020049
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0040601509020049