A device for freezing of a flue sig in a pipeline.

摘要

1. Device for freezing a liquid in a pipe (4) for the purpose of shut-off the pipe by means of an ice stopper consisting of a pipe surrounding insulated vessel (1, 2, 3) with connections (7, 8) for supply and discharge of an extremely cold coolant as well as replaceable insets (11) which may be inserted in the front wall (3) pierced by the pipe of the vessel in order to allow an adjustment to the different pipe diameters, characterized by the fact that the insets consist of hard paper.