| 摘要 |
<p>A safety pressure relief device for location on a pressure vessel includes an assembly (2) including a reverse bursting disc having an annular flange member (16) surrounding an inner disc member (18) consisting of an annular flange portion (22) and a central concave-convex dome portion (20), the external diameter of the disc member (18) being substantially equal to the internal diameter of the flange member (16). The flange member (16) and flange portion (22) are located between annular inlet and outlet support members (26,28), an axial clamping pressure being applied to the assembly (2) by a holder member (4,6) and there being a joint (24,40) of predetermined strength effected between said two members (16,18) such that, when a predetermined critical pressure applied to the disc causes reversal of the dome portion (20), the joint between the flange member (16) and part at least of the flange portion (22) is broken and said part at least of the flange portion (22) is withdrawn from between the support members (26,28).</p> |
