| 摘要 |
A pressure vessel comprises a closed end, a cylindrical side wall (11) and a shoulder and neck. The internal surface profile of the closed end of the pressure vessel comprises a central section (13), at least one intermediate ring (14) and an outermost ring (15) with intersecting but differing curvatures of radii: R, r, and Rc respectively. The central section (13), the at least intermediate ring (14) and the outermost ring (15) connect a central point where the end face intersects the longitudinal axis with the cylindrical side wall. The relationship between the radii of the central section (13), the at least intermediate ring (14) and the outermost ring (15) in combination with the height H of the closed end to its junction (10) with the cylindrical side wall (11) provide a high pressure vessel which may be manufactured using either cold or warm extrusion and which has an equivalent or improved lifetime in contrast to equivalent conventional high pressure vessels manufactured using hot extrusion.A method of manufacturing the pressure vessel is also disclosed. |
