| 摘要 |
A method of forming a metal to metal seal between two confronting faces of pressure containing bodies. A first step involves providing a first pressure containing body having a first clamping face surrounding a first aperture. A second step involves providing a second pressure containing body having a second clamping face surrounding a second aperture. A third step involves machining a first interior seal groove in the first pressure containing body which serves to widen the first aperture. The first seal groove has truncated angular corners spaced from the first clamping face. A fourth step involves machining a second seal groove in the second pressure containing body serving to widen the second aperture. The second seal groove has truncated angular corners spaced from the second clamping face. A fifth step involves a malleable metal sealing ring with truncated angular outer edges complementary to the truncated angular corners in the first seal groove and the second seal groove. The sealing ring is dimensioned so that the truncated angular outer edges engage the truncated angular corners prior to the first clamping face and the second clamping face engaging. A sixth step involves clamping the first clamping face and the second clamping face together in face to face relation to energize the seal. The subsequent application of internal pressure serves to promote deflection of the metal sealing ring at the truncated angular corners such that an increase in internal pressure serves to further energize the seal.
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