What seal to use on pressure vessel?

The choice of seal for a pressure vessel depends on factors such as the operating pressure, temperature, and the type of fluid being contained. Common seal types include O-rings, gaskets, and spiral wound gaskets, with materials like PTFE, rubber, or metal depending on compatibility with the process. It's crucial to ensure that the seal can withstand the specific conditions of the application to prevent leaks and maintain safety. Consulting industry standards and manufacturer's recommendations is essential for proper selection.