Acoustic Emission Testing and Structural Evaluation of Seamless, Steel Tubes in Compressed Gas Service

[+] Author and Article Information
P. R. Blackburn, M. D. Rana

Linde Division, Union Carbide Corporation, Tonawanda, N.Y. 14151

J. Pressure Vessel Technol 108(2), 234-240 (May 01, 1986) (7 pages) doi:10.1115/1.3264774 History: Received February 26, 1985; Revised May 09, 1985; Online November 05, 2009


Tube trailers are used in the distribution of industrial gases. The tubes, which are seamless steel, measure 22-in. diameter, about 1/2-in. wall, and 34 ft long. The U. S. Department of Transportation mandates periodic re-tests of tubes every 5 yr. Acoustic emission re-tests have been substituted for hydrostatic re-tests. This paper presents an analysis of flaws using fracture mechanics methods and establishes a maximum allowable flaw depth. It describes the acoustic emission test method and presents some typical results. Also, some discussion of the hydrostatic re-test is included.

Copyright © 1986 by ASME
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