Method of and apparatus for the stressing of pressure vessels

摘要

A cylindrical pressure vessel is placed under an inward prestress to resist outward forces by the application of outwardly spread annular stressing means which are then permitted to bear inwardly upon the vessel. The device includes fluid-pressure means for relieving the inward force during the application of the annular means so that at least one ring of the latter can expand outwardly and then contracted on the periphery of the vessel.