| 摘要 |
A method and an apparatus for covering a pressure vessel are provided to improve the durability and sealing and to prevent dishing of the vessel by using a dome-type cover to distribute stress uniformly. A cover(54) for a pressure vessel includes a first surface(86) at a first side which is a sealing side, a second surface at a second side opposite to the first side, a third surface(70) curved toward the second side in an axial direction at the first side, a fourth surface(62) at the second side, and a hole(50) bored between the third surface and the fourth surface, allowing fluid-communication.
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