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Tech Talk
A universal pantographic cold wall expansion joint .
• Identify potential modifications : If discrepancies are detected , adjustments may be required to optimize performance . This can include another pipe stress analysis .
• Provide documentation : Prepare a report detailing the test process , findings , and whether the joint meets performance expectations .
Design considerations : hinged and gimbal expansion joints In FCC systems , hinged and gimbal expansion joints are commonly used due to their ability to accommodate angular movements . These joints often feature a series of pins that must handle high loads while maintaining flexibility . Movement testing under pressure allows engineers to observe the effects of high-pressure friction on the hinge pins , an important factor since frictional forces can increase with pressure and potentially lead to binding or higher load requirements . In addition to testing , careful selection of materials and design enhancements is crucial . For hightemperature applications , materials like Alloy 625 may replace standard 321 stainless steel for improved corrosion resistance . Movement testing validates these design choices by confirming that materials can handle the operational stresses without degradation .
Conclusion Movement testing plays an invaluable role in FCC installations , ensuring that expansion joints will perform as designed under intense conditions . By validating theoretical calculations , identifying potential stress points , and improving component reliability , movement testing helps refinery operators avoid costly downtime and enhances overall system safety . Expansion joints , though often viewed as simple components , are essential in maintaining the integrity of complex FCC operations . By following the outlined steps , operators gain the assurance that these components will deliver the required flexibility , durability , and performance under real-world conditions .
About the expert
Nelson Kavanagh is a mechanical engineer who has worked at Teadit Group for 40 years . During this period , he gained significant experience in engineering many products . His particular focus is on designing , developing , and manufacturing processes of expansion joints . He is a member of the EJMA technical committee and is dedicated to continuously improving the EJMA standard .
About the author
Angelica Pajkovic is a Client Specialist at Teadit , with a particular focus on technical content development . Hailing from Toronto , Canada , she has over six years of experience in the industrial industry . In her previous role as Editor-in-Chief at an industrial B2B Publishing company , she gained a rounded understanding of the challenges , interests , and business relationships in the industrial sector . For more information , please contact Angelica via email at : angelicap @ teadit . com .
38 Heat Exchanger World February 2025 www . heat-exchanger-world . com