APARATO PARA OBTURAR HERMETICAMENTE DE MANERA PASAJERA UNA TUBERIA DE FLUIDO EN UNA VASIJA A PRESION DE UN GENERADOR DE VAPOR

摘要

The seal comprises an expanding device applied hermetically to the outer wall of the piping. The device can be actuated radially to give controlled compression. - A device is also provided for introducing and removing the expanding device from the piping.