As the environment for the oil and gas industry has become increasingly demanding, so has the need for reliable sealing solutions and related standards.
Traditionally, metal seals and gaskets had been considered of interest because of their high temperature resistance and mechanical properties. However, their obvious downside of limited ductility and elasticity, compared to non-metallic materials, remained difficult to overcome. Soft, compressible elastomers provide good sealing performance, but are porous and cannot reliably withstand temperatures in excess of 482°F (250°C). They also become hard and brittle in cryogenic service. Metal seals have much greater temperature capabilities, high mechanical properties, lack of porosity and long shelf life, but as mentioned, ductility and elasticity have always been the limiting factor. Understanding application requirements and design criteria is critical to selecting the proper sealing solution in challenging applications such as subsea oil & gas production.
Number of Pages
Lamb, K. 2014. Metal Seals for Critical Valve Applications. Valve World. Vol 19, Issue 9: 125&-127.
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