VESSEL PRODUCTION METHOD Russian patent published in 2009 - IPC B21D51/24 

FIELD: metallurgy.

SUBSTANCE: method relates to pressurised treatment of metals and may be used for high pressure containers manufacturing from pipe shells. The method includes pipe cutting to sections, forming of bottom, hot turning of throat, mechanical treatment, cleaning of inner surface and thermal treatment, which will be due after throat turning but when bottom is not formed. After inner surface cleaning, the outer surface is to be cleaned. Then, the cylindrical surface of work piece is lubricated and treated to make walls thinner. The latter operation is performed in rolling-off machines, when items are cold. The end part of the work piece remains with the original thickness. After that, bottom is formed by squeezing end part of the work piece in the rolling-off machine.

EFFECT: reduced weight of container and reduced manpower effort during thermal treatment and cleaning, increased strength of item.

2 cl, 4 dwg