Method for ultrasonic detection of hydrogen damage in boiler tub

Details Method for ultrasonic detection of hydrogen damage in boiler tub Method for ultrasonic detection of hydrogen damage in boiler tub

1986-01-27

1987-08-11

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73622, G01N 2904

Patent

active

046853340

ABSTRACT:
Angle-beam ultrasonic shear-waves, which are introduced via a pitch-catch technique in the axial and circumferential directions of a boiler tube, are used to detect the presence of hydrogen damage in boiler tubes.

REFERENCES:
patent: 3512400 (1970-05-01), Lynnworth
patent: 4092868 (1978-06-01), Thompson et al.
patent: 4307616 (1981-12-01), Vasile
"Inspection for Hydrogen Damage in Boiler Waterwall Tubes", Singh; Materials Evaluation, Sep. 1985.
"Ultrasonic Velocity Ratio Method for Detecting & Evaluating Hydrogen Attack in Steels", Watanabe et al, ASTM, pp. 153-165, May 22-24, 1984.
Failures & Inspection of Fossil-Fired Boiler Tubes: 1983 Conference & Workshop, CS-3272, Contract WS 82-101, Dec. 1983, Articles:
a. "Inspection for Hydrogen Damage in Waterwall Tubes Using Ultrasonic Techniques", Sloat et al.
b. "Mitigating Forced Outages by Selective Replacement of Boiler Tubes", Loper et al.
c. "Working Group on Hydrogen Damage, Pitting and Deposits", Freeh et al.

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