CLOSING SYSTEM FOR PRESSURIZED PIPELINES Russian patent published in 2018 - IPC F16L41/04 

FIELD: pipes.

SUBSTANCE: invention relates to a closing system for pressurized pipelines, in particular to the closing fitting fittings for the purpose of tie-in without lowering the pressure in the pipeline. Closing system comprises one fitting having a lower end, which is adapted to be connected around the opening of the conduit, and an upper end having an opening adapted to receive a closing plug therein. Plug is integrated with the fitting by means of fixing screws, each of which is adapted to engage with the stop surface of the plug. To interact with the protruding ends of the fixing screws, the stop surface of the plug is chamfered at the same angle as the screws, this allows to correct the deviations of the plug relative to the flange hole, while maintaining the reliability of the plug and flange connection. Guide surface of the plug has a conical shape, allowing, when plugging the plug hole in the fitting, to exclude deviations from the axis of the hole. After the completion of the work on the design of the closing system, a plug on the welding is installed.

EFFECT: invention improves the accuracy of fitting the plug into the fitting and the reliability of the installation process.

1 cl, 5 dwg