IMPROVEMENTS IN OR RELATING TO METAL-TO-METAL SEALING

摘要

A metal-to-metal seal (10) is provided. The seal comprises a first mating surface (22) and a second mating surface (32). The first mating surface is provided with an annular projection (24). The first mating surface is fabricated from a harder material than the second mating surface such that, when the first and second surface are brought into mating contact, the annular projection of the first mating surface deforms the second mating surface to form a seal.