creep relaxation RSS

A gasket can create a reliable seal when first installed, only to begin leaking months or even years later. When that happens, it's easy to assume the gasket has failed or the flange bolts have loosened. In many cases, the real cause is less obvious: gasket creep relaxation. Over time, some gasket materials gradually deform while under constant compression, reducing the sealing stress needed to maintain a leak-tight joint. As that sealing stress decreases, the likelihood of leakage increases, particularly in applications involving elevated temperatures, pressure fluctuations, or extended service intervals. Understanding how gasket creep relaxation occurs can help maintenance...