Thin-walled receiver subject to large pressure variations - is subjected to fluid pressure above elastic limit below rupture limit optimising ratio useful vol. to space occupied

摘要

Process for fabricating a metal receiver with a relatively thin wall which is to be subjected to large variations in internal pressure consists of forming a parallelepipedal enclosure from deformable thin metal sheets and subjecting the interior of the enclosure to a high fluid pressure greater than the elastic limit of the vessel but lower than the rupture limit and in the deformation range. After relaxation of the pressure this process gives a permanent swelling to the walls of the enclosure. The curvature of the swelling is established depending on the lines of resistance and the local internal forces appearing at each point of the walls. The enclosure is then provided with orifices and means of access suitable for the uses for which it is intended. The process combines the dimensional stability of cylindrical enclosures with the qualities of adaptation and of optimal ratio between space taken up and useful vol. of parallelepipedal enclosures without presenting the inconveniences of these two types of enclosures. It can be used for making any metal receiver subjected to repeated variations of pressure positive or negative between the interior and the exterior for which the ratio of useful vol. to space occupied is an important factor.