Flanged and Flued Expansion Joints

Flanged and flued expansion joints represent a specialized type of thick-wall expansion joint, typically fabricated in two halves from flat annular plates. The outer edges of each plate are formed outward (flanged),while the inner edges are formed inward (flued).These halves are then welded together to create a complete assembly and subsequently integrated into the heat exchanges shell. Due to their thicker wall construction, flanged and flued expansion joints are exceptionally rugged and well-suited for applications involving mechanical abuse or high-pressure environments. However, this added durability comes at the expense of flexibility, which is more limited compared to other expansion joint types.

LSI-MECH flanged and flued expansion joints are designed in full accordance with ASME Section VIII, Division 1 Appendix 5, which provides mandatory guidelines for the design and construction of these joints. Additional compliance with ASME Appendix 26 and the EJMA (Expansion Joint Manufacturers Association) standards ensures accurate calculation of stress levels, spring rates, and fatigue life, guaranteeing both safety and performance in critical pressure vessel and heat exchanges applications.