Abstract
The tube to tubesheet joint in a heat exchanger is one of the most critical joint and it has to meet stringent requirements as it provides the main barrier between the tube side and shell side fluids of heat exchanger. This paper discusses the various kinds of tube to tubesheet joint in heat exchanger, joint configuration adopted in PFBR IHX, structural analysis of IHX, axial load distribution in tube rows and experimental verification in order to evaluate allowable strength of tube to tubesheet joint. In IHX, tubes in outer rows are under tension and maximum stresses are below the allowable stresses in the tubes. Detailed experimental investigations result shows that the rolled and welded joint is stronger than the basic strength of the tube material. However, the allowable tensile strength of the joint under mechanical loading considered is 0.95 times the allowable value for tubes as per ASME.
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