Forged Technology, Not Certrifugal Casting All ring joint gaskets are made of solid bar by forging and heat treatment, very high tensile. Ring type gaskets are primarily used in the Oil, Gas and Petrochemical industries to seal flanged connections subject to high pressure and temperatures, and form a metal to metal seal with the flanges. The gaskets fully comply with the ASME B16.20 standard and the API spec 6A requirements (where applicable). All gaskets complying to API Standard 6A are marked with API Monogram Licence No as per API-6A (2347). The gaskets meet the rigid quality requirements for Ring Joint Gaskets set by the American Petroleum Institute (API).