Expansion joints play a crucial role in ensuring the safety and reliability of piping systems. Performance expansion joints offer excellent spring rates and movements, high-quality designs, and materials that are rigorously tested to provide peace of mind for end users. These joints are versatile, reducing inventory and simplifying decisions about which joint to use. They are rated for full vacuum on the suction side and pressure ratings on the discharge side of a pump. Validation testing ensures these are among the safest and most reliable expansion joints available.
Pipes expand and contract with temperature changes, stressing anchors and the pipe wall. Expansion joints designed to handle thermal movement can mitigate this stress, protecting piping, pumps, and nozzle loads.
Expansion joints can isolate equipment or structures from pipeline vibrations. During normal operations, equipment produces vibrations that can stress piping. Installing expansion joints can dampen these vibrations, preventing damage to critical equipment.
In older facilities, alignment between equipment is often imperfect due to constant maintenance. Expansion joints can compensate for pipe movements and settling (compression, elongation, and lateral misalignment) without costly rework.
End users should consider the capabilities of their expansion joints regarding safety, service life, and uptime. Performance ratings are assigned based on rigorous testing to meet Fluid Sealing Association standards. Validation testing of pressure/vacuum, movement, spring rates, and material compatibility ensures a long-lasting expansion joint that won’t fail at critical times, posing safety hazards.
Designing a best-in-class expansion joint requires a robust test and validation methodology. Theoretical designs and calculations establish expansion joint ratings, but destructive and nondestructive tests validate these ratings. Fluid Sealing Association standard tests include hydrostatic and vacuum testing, cycle life testing, and ASTM testing.
Expansion joints are often overlooked in piping systems until a failure occurs. With maintenance and engineering teams stretched thin, end users need reliable parts. Proven validation testing reduces the burden on operations teams by ensuring the parts will perform as specified.
To make informed purchasing decisions, buyers, engineers, and maintenance teams need a comprehensive understanding of their expansion joints. Knowing the testing and ratings allows users to ask the right questions and trust the data sheet matches the product’s performance. The goal is to provide a best-in-class expansion joint backed by real-world validation testing, ensuring it is one of the safest and most reliable options on the market.
Ask yourself: What is your expansion joint capable of?
For those interested in reading the full Sealing Sense Article “The Capabilities of Expansion Joints” click here.
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