Supplier manuals never mention shelf life of RD. But vendors suggesting to replace regularly (3 years), I believe merely to get the business.
In general, rupture disks are designed to have a long shelf life if they are properly stored in a controlled environment and are not subjected to any significant mechanical or environmental stresses. This is often described as an “infinite” shelf life.
However, it’s important to understand that the actual in-service life of a rupture disk can vary depending on many factors. Some manufacturers may recommend replacing disks after a certain period of in-service time, regardless of whether they have ruptured or not, to ensure reliable performance.
If a supplier is suggesting replacement, it could be a good idea to ask for their rationale. If they can’t provide a good explanation beyond wanting to make a sale, you might want to consider seeking advice from a different source, such as the manufacturer, an independent consultant, or a relevant standards organization.
You should always follow the manufacturer’s recommendations for installation, operation, and maintenance to maximize the performance and reliability of rupture disks. If in doubt, you can always directly reach out to the manufacturer for more specific advice on the lifespan of their rupture disk in your specific conditions.
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