1. S. [Perforación, Producción, Pruebas de producción, Terminación de pozos, Pruebas de pozos, Remediación e intervención de pozos]

A flange consisting of two parts—a hub and a ring. The hub contains the gasket profile, and the ring features the bolt-hole pattern. The ring can rotate around the hub for easier makeup. Once the bolts are tightened, the ring is compressed against the hub via a shoulder and secured in place.