Measuring and testing – Vibration – By mechanical waves
Patent
1993-02-10
1995-04-11
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
376249, 376252, 73598, 73600, 73630, 73648, G01N 2906
Patent
active
054047544
ABSTRACT:
This invention defines a combined inspection procedure using ultrasonic techniques for detection of hydrogen attack damage in material. The procedure comprises an initial scanning procedure for locating areas suspected of being damaged by hot hydrogen. The initial scanning procedure is a pattern-based backscattering test that provides a pattern which is classified as falling within at least one of four backscattering pattern category types. Follow-up test procedures based upon the pattern type are then performed. These tests include spectrum analysis, velocity ratio, spatial averaging backscattering, and frequency dependence for assessing whether the material has hydrogen attack damage and the extent of hydrogen damage in the suspect areas. Should hydrogen attack damage be identified, the velocity ratio and spectrum analysis tests can then be used to determine mechanical properties of the hydrogen attack damaged material.
REFERENCES:
patent: 4596142 (1986-06-01), Poole et al.
patent: 4750366 (1988-06-01), Nicolas
patent: 4890496 (1990-01-01), Birring et al.
patent: 5029475 (1991-07-01), Kikuchi et al.
patent: 5092176 (1992-03-01), Buttram et al.
patent: 5197019 (1993-03-01), Delon-Martin et al.
K. Kawano and A. S. Birring, "Hydrogen Damage Detection by a Nondestructive Technique," Material Performance, Aug. 1989, pp. 71-74.
A. S. Birring, D. G. Alcazar, J. J. Hanley, and S. Gehl, "Ultrasonic Detection of Hydrogen Damage," Materials Evaluation, vol. 47, Mar. 1989, pp. 345-369.
K. Kawano and A. S. Birring, "Hydrogen Damage Detection by a NDT Technique," in the Proceeding of Corrosion Conference at New Orleans, La., Apr. 17-21, 1989, Paper No. 263, pp. 1-14.
A. S. Birring, D. G. Alcazar, J. J. Hanley, G. J. Hendrix, and S. Gehl. Proceedings of the EPRI Conference on boiler Tube Failures in Fossil Plants, EPRI-CS-5500-SR, "Detection of Hydrogen Damage by Ultrasonics", 1987 pp. 5-59 to 5-75.
M. Yajima, D. Shozen, T. Ohe, "Detection of High-Temperature Hydrogen Attack of Steels by Ultrasonic Testing" Proceedings-American Petroleum Institute, Refining Department V63, 1984, pp. 44-54.
G. P. Singh, "Inspection for Hydrogen Damage in Boiler Waterwall Tubes," Materials Evaluation, vol. 43, Sep., 1985, pp. 1164-1166.
N. O. Cross and A. R. Ciuffreda, "Development and Application of Nondestructive Ultrasonic Test for Detecting High-Temperature Hydrogen Attack of Steels," American Petroleum Institute, Proceeding of the 48th Midyear Refinery Meeting in Los Angels, Calif., May 10, 1983.
T. Watanabe, Y. Hasegawa and K. Kato, "Ultrasonic Velocity Ratio Method for Detecting and Evaluating Hydrogen Attack in Steels," Corrosion Monitoring in Industrial Plants Using Nondestructive Testing and Electrochemical Methods, ASTM STP 908, C. C. Morgan and P. Labine, Eds., American Society for Testing and Materials, Philadelphia, 1986, pp. 153-164.
M. J. Loper, R. D. Shoemaker, and J. G. Stromp, "Mitigating Forced Outages by Selective Replacement of Boiler Tubes", Proceedings of Failures and Inspections of Fossil-Fired Boiler Tubes: 1983 Conference and Workshop, pp. 6.35-6.52, Dec. 1983.
Finley Rose M.
Shell Oil Company
Williams Hezron E.
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