Yankee Dryer Crevice Corrosion Evaluation, 1994 Engineering Conference Proceedings

R. E. Jostad

A Yankee dryer was found to have crevice corrosion at the clamp fit of the head and shell flanges. The severity of this corrosion caused high stresses due to corrosion jacking forces. A replacement dryer was ordered. Nondestructive examinations were performed to track corrosion growth and verify Yankee dryer structural integrity during the last year of operation. These tests included head tilt, shell runout, acoustic emission, and ultrasound. After the dryer was replaced, further nondestructive examinations were conducted to augment these nondestructive examinations. Finally, sections of the dryer head were cut out to validate nondestructive examinations. Investigations of two other Yankee dryers with the same problem are also discussed.

Author: Jostad, R.E.
Yankee Dryer Crevice Corrosion Evaluation, 1994 Engineering
Yankee Dryer Crevice Corrosion Evaluation, 1994 Engineering Conference Proceedings
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