Cracking in 25Cr35NiNb pyrolysis furnace tubes is difficult to detect in engineering production. This paper presents a metal magnetic memory technique for inspecting cracks. To verify the effectiveness of the proposed technique, positions where abnormal magnetic signals existed were rechecked by penetration testing and scanning electron microscopy. Magnetic memory technique results agree well with penetration testing and scanning electron microscope results, providing an effective method to detect cracks in 25Cr35NiNb pyrolysis furnace tubes. However, further research is required for the magnetic memory technique to attain full maturity for use in engineering applications.
Issue Section:
Technical Brief
References
1.
Chen
, T.
, Chen
, X. D.
, Lu
, Y. R.
, Ai
, Z. B.
, and Fan
, Z. C.
, 2015
, “Status of Using, Manufacturing and Testing of Ethylene Pyrolysis Furnace Tubes in China
,” Engineering Asset Management—Systems
, Springer International Publishing
, Berlin, Germany, pp. 1027
–1042
.2.
Chen
, T.
, Chen
, X. D.
, Lu
, Y. R.
, Ye
, J.
, and Lian
, X. M.
, 2012
, “Creep and Fracture Behavior of Centrifugal Cast HP40Nb Alloy Containing Lead
,” ASME
Paper No. PVP2012–78312. 3.
Sposito
, G.
, Ward
, C.
, Cawley
, P.
, Nagy
, P. B.
, and Scruby
, C.
, 2010
, “A Review of Non-Destructive Techniques for the Detection of Creep Damage in Power Plant Steels
,” NDT&E Int.
, 43
(7
), pp. 555
–567
.4.
Madhi
, E.
, and Nagy
, P. B.
, 2011
, “Sensitivity Analysis of a Directional Potential Drop Sensor for Creep Monitoring
,” NDT&E Int.
, 44
(8
), pp. 708
–717
.5.
Xiang
, T.
, Deng
, M. X.
, and Xuan
, F. Z.
, 2014
, “Thermal Degradation Evaluation of HP40Nb Alloy Steel After Long Term Service Using a Nonlinear Ultrasonic Technique
,” J. Nondestr. Eval.
, 33
(2
), pp. 279
–287
.6.
Ren
, J. L.
, and Lin
, J. M.
, 2008
, Electromagnetic Nondestructive Testing
, Science Press
, Beijing, China.7.
Dubov
, A.
, Dubov
, A.
, and Kolokolnikov
, S.
, 2014
, “Application of the Metal Magnetic Memory Method for Detection of Defects at the Initial Stage of Their Development for Prevention of Failures of Power Engineering Welded Steel Structures and Steam Turbine Parts
,” Weld. World
, 58
(2
), pp. 225
–236
.8.
Guan
, W. H.
, Guo
, P. J.
, and Chen
, X. D.
, 2015
, “Metal Magnetic Memory Testing Technique for Typical Defects in Pressure Vessels and Pipelines
,” ASME
Paper No. PVP2015–45826. 9.
Khodamorad
, S. H.
, and Haghshenas
, D. F.
, 2012
, “Inspection of Carburization and Ovalness in Ethylene Cracking Tubes by Using a Semi-Robot
,” Eng. Failure Anal.
, 25
, pp. 81
–88
.10.
Chen
, T.
, Chen
, X. D.
, Liu
, C. J.
, Ye
, J.
, and Nie
, D. F.
, 2014
, “Carburization of Ethylene Pyrolysis Furnace Tube in a Petrochemical Plant
,” ASME
Paper No. V06AT06A067. 11.
Yao
, K.
, Deng
, B.
, and Wang
, Z. D.
, 2012
, “Numerical Studies to Signal Characteristics With the Metal Magnetic Memory-Effect in Plastically Deformed Samples
,” NDT&E Int.
, 47
(2
), pp. 7
–17
.12.
Liu
, B.
, Fu
, Y.
, and Jian
, R.
, 2015
, “Modelling and Analysis of Magnetic Memory Testing Method Based on the Density Functional Theory
,” NDT&E Int.
, 30
(1
), pp. 13
–25
.13.
Guo
, P. J.
, Chen
, X. D.
, Guan
, W. H.
, Cheng
, H. Y.
, and Jiang
, H.
, 2011
, “Effect of Tensile Stress on the Variation of Magnetic Field of Low-Alloy Steel
,” J. Magn. Magn. Mater.
, 323
(20
), pp. 2474
–2477
.14.
Roskosz
, M.
, and Bieniek
, M.
, 2012
, “Evaluation of Residual Stress in Ferromagnetic Steels Based on Residual Magnetic Field Measurements
,” NDT&E Int.
, 45
(1
), pp. 55
–62
.15.
Wang
, Z. D.
, Yao
, K.
, Deng
, B.
, and Ding
, K. Q.
, 2010
, “Quantitative Study of Metal Magnetic Memory Signal Versus Local Stress Concentration
,” NDT&E Int.
, 43
(6
), pp. 513
–518
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