NORSOK M-710 is the most widely accepted qualification standard for non-metallic seals in oil & gas. It combines aging in sour fluid (H2S), RGD testing, and extrusion resistance evaluation. Only compounds passing full NORSOK qualification are accepted by major operators for North Sea and other harsh HPHT fields. Certification is compound-specific and temperature-rated https://globalsealstech.com/oil-gas-seals/