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James R. Keiser, Gorti B. Sarma, Xun-Li Wang, Camden R. Hubbard, Robert W. Swindeman, Douglas L. Singbeil, Preet M. Singh--Cracks were first reported in 1992 in co-extruded 304L stainless steel/SA210 Gd A1 carbon steel floor tubes of North American black liquor recovery boilers. Since then, a considerable amount of information has been collected on the tube environment, crack characteristics, the stress state of the tubes, and the crack initiation and propagation mechanisms. These studies have identified both operating procedures that apparently can greatly lessen the likelihood of crack formation in the stainless steel layer and alternate materials that appear to be much more resistant to cracking than is 304L stainless.
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Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.
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Why do Kraft Recovery Boiler Composite Floor Tubes Crack?, 2000 Engineering Conference Proceedings
