DEVICE FOR PREVENTION OF DEVELOPMENT OF SLIT-SHAPED AND CORROSION DEFECTS OF PIPELINE WALLS Russian patent published in 2008 - IPC F16L57/00 

FIELD: building, the pipeline.

SUBSTANCE: invention concerns pipeline transport and can be used for maintenance and repair of pipelines for local decrease in hoop tension from internal pressure in places of defects of pipelines (rust, cracks, dents, etc.). Mount the tight socket end supplied with a branch pipe with a through axial aperture on a defective pipe run. The crane which clearing hole is coaxial with a through axial opening of a branch pipe in which the blind flange with possibility of its moving is placed is placed on the branch pipe. The branch pipe is supplied with a bypass; the connecting pipe which channels through passage is connected to a through axial aperture of a branch pipe. The connecting pipe is supplied by the crane connecting a via axial opening of the branch pipe with a pressure metre or atmosphere. The angular thread for a threaded coupling with a blind flange is executed in a via axial opening. The device is supplied by the tool for blind flange screwing up.

EFFECT: expansion of an arsenal of means for repair of pipelines.

3 cl, 2 dwg