Analysis of Condensor Tube Thinning Distribution and their Failure Modes Based on Eddy Current Data

Fatchur Rozaq; Fahmi Mubarok

doi:10.4028/www.scientific.net/KEM.867.140

Paper Titles

Extraction and Characterization of Nanocrystalline Cellulose (NCC) from Ramie Fiber by Hydrochloric Acid Hydrolysis
p.109

Impact Toughness Characteristics of SM570-TMC Steel Joint Using Welding Wire Containing 0.4% Nickel at Different Level of Heat Input
p.117

Effect of Surface Treatment and Cutting Orientation to the Changes in Stents Surface Roughness
p.125

Effect of Grain Size in Silica Blasting Processes on the Surface Roughness of Medical Grade SS 316L
p.134

Analysis of Condensor Tube Thinning Distribution and their Failure Modes Based on Eddy Current Data
p.140

Numerical Convergence in Wear Volume Prediction of UHMWPE Acetabular Cup Paired with cp Ti Femoral Head Hip Implants
p.148

Fabrication Membrane of Titanium dioxide (TiO₂) Blended Polyethersulfone (PES) and Polyvinilidene fluoride (PVDF): Characterization, Mechanical Properties and Water Treatment
p.159

Effects of Aluminum and Manganese Addition on the Microstructures and Mechanical Properties of Cu-29Zn Alloys
p.166

Correlation of Holding Time and Bottom Ash Particle Size to Mechanical Properties of Polypropylene Composite
p.172

HomeKey Engineering MaterialsKey Engineering Materials Vol. 867Analysis of Condensor Tube Thinning Distribution...

Analysis of Condensor Tube Thinning Distribution and their Failure Modes Based on Eddy Current Data

Abstract:

The condenser in Steam Power Plant is critical equipment to convert steam from the steam output of the low-pressure turbine to become liquid. Thus, maintaining the reliability of the condenser will prevent progressive failure to other equipment. One of the methods to investigate their reliability is using eddy current test on the pure titanium grade 2 condenser tubes to measure their wall thinning level in comparison to their original thickness of 0.5 mm. Based on the measurement, any tubes having 0.05 mm in thickness (wall thinning level of 90%) and below are plugged to prevent potential leakage. In 2018, the condenser in unit 2 of Labuan steam power plant in Banten province, Indonesia was tested by eddy current on all tubes. Results indicate that condenser tube with wall tube thinning ≥ 90% were totaling 733 tubes (± 5% of the total tubes). The location and distribution of the highest probability of tubes leaking due to wall thinning problems were generated after statistical analysis. The data obtained in this unit can be used as a reference for maintenance strategy on other units working in the same condition. In order to understand the tube thinning mechanism, one tube at A-side inlet that has 97% of wall thinning level was cut and submitted to metallography and hardness testing. The results point out that no crack or corrosion product was found and the microstructure of the tubes did not alter as compared to their original tubes. This indicates that pure erosion mechanism takes place causing the thinning of the tubes.

You might also be interested in these eBooks

Mechanical Engineering: Advanced Materials Processing Technology

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 867)

Pages:

140-147

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.867.140

Citation:

Cite this paper

Online since:

October 2020

Authors:

Fatchur Rozaq, Fahmi Mubarok*

Keywords:

Condenser Tube, Eddy Current, Titanium, Wall Thinning

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] A. Grunsky, Condenser Application and Maintenance Guide, Technical Report, EPRI California, USA (2001).

Google Scholar

[2] E. M. Z. Daffaallah, Evaluation Of Eddy Current Condenser Tube Inspection Practice In Khartoum North Power Station, Thesis, University of Khartoum, Sudan, (2015).

Google Scholar

[3] H.M. Shalaby, H. Al-Mazeedi, H. Gopal, N. Tanoli, Failure of titanium condenser tube, Engineering Failure Analysis 18 (8) (2011) 1990–(1997).

DOI: 10.1016/j.engfailanal.2011.05.008

Google Scholar

[4] M. Montgomery, A. Enemark, A. Hangaard, Failure of Titanium Condenser Tubes After 24 Years Power Plant Service, Journal of Failure Analysis and Prevention 14 (5) (2014) 554–563.

DOI: 10.1007/s11668-014-9862-y

Google Scholar

[5] B. E. Murmansky, K. E. Aronson, and Yu. M. Brodo, Estimation of the residual life of steam-turbine condensers based on statistical models, Thermal Engineering 62 (11) (2015) 785–789.

DOI: 10.1134/s0040601515110051

Google Scholar

[6] E. H. Fayard, Improving Condenser Reliability and Availability Through Effective Offline Cleaning and Nondestructive Testing, Proceedings of Electric Power Research Condenser Technology Conference 2011, EPRI, Chicago, USA.

DOI: 10.1115/power2009-81196

Google Scholar

[7] Dongfang Turbine Work. Co. Ltd. Manual of condenser specification of Project PLTU Banten 2 Labuan (2x300 MW), China (2008).

Google Scholar

[8] Fei-Jun Chen, Cheng Yao, Zhen-Guo Yang, Failure analysis on abnormal wall thinning of heat-transfer titanium tubes of condensers in nuclear power plant Part I: Corrosion and Wear, Engineering Failure Analysis 37 (2014) 29-41.

DOI: 10.1016/j.engfailanal.2013.11.003

Google Scholar

[9] Fei-Jun Chen, Cheng Yao, Zhen-Guo Yang, Failure analysis on abnormal wall thinning of heat-transfer titanium tubes of condensers in nuclear power plant Part II: Erosion and cavitation corrosion, Engineering Failure Analysis 37 (2014) 42-52.

DOI: 10.1016/j.engfailanal.2013.11.002

Google Scholar

[10] D.J. Simbi, J.C. Scully, The effect of residual interstitial elements and iron on mechanical properties of commercially pure titanium, Materials Letters 26 (1–2) (1996) 35-39.

DOI: 10.1016/0167-577x(95)00204-9

Google Scholar