This paper describes preparing mockup tubesheet specimens for visual examination using a digital microscope to determine that tube-to-tubesheet joint welds are of the specified size and that expanded joints are satisfactory for the intended purpose. It discusses nondestructive examinations (NDE) of the tubesheets and tube joints intended to assure achieving sufficient tightness and strength to satisfy the uses to which the exchangers will be put. This paper refers to the ASME Boiler and Pressure Vessel Code (Code) paragraphs that apply to tube joint welds and expanded joints including shear load testing when the Code requires it . The discussion also addresses the need for manufacturers to have qualified tube joining procedures and personnel qualified to use the qualified procedures. The work concludes with a summary of ways to assure tube joint tightness and strength.
Assuring Tube-to-Tubesheet Joint Tightness and Strength
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received June 27, 2011; final manuscript received October 25, 2011; published online October 18, 2012. Assoc. Editor: William J. Koves.
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Yokell, S. (October 18, 2012). "Assuring Tube-to-Tubesheet Joint Tightness and Strength." ASME. J. Pressure Vessel Technol. December 2012; 134(6): 064502. https://doi.org/10.1115/1.4006123
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