Near Drum Cracking in Recovery Boiler Generating Bank Tubes, 1997 Engineering Conference Proceedings

This paper describes a new automated ultrasonic inspection system that has been engineered to search for cracks in the short swaged tube sections immediately adjacent to the upper or lower drum in the generating bank tube section of black liquor chemical recovery boilers.

Near drum cracking can be detected using this automated immersion method utilizing controlled scanning and logical analysis of both straight beam and angle beam (shear wave) data.

Real time computer display of B and C scans using color graphics simplify the large volume of data into an easily understandable output for non-technical personnel.

Crack indications with depths as low as 10% of the wall thickness can be detected for external cracks and 20% of the wall thickness for internal cracks.

Author: Stasuk, D. G.
Near Drum Cracking in Recovery Boiler Generating Bank Tubes,
Near Drum Cracking in Recovery Boiler Generating Bank Tubes, 1997 Engineering Conference Proceedings
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