Abstract
At the All-Union Scientific-Research and Design Institute for Chemical and Petroleum Apparatus Building Technology a design of a device has been developed for simultaneous tightening of 3 studs by preliminary tension. Explains that the operating reliability of modern heat-exchange equipment depends to a large degree upon providing the required tightness of the threaded flange joints. Tests of an experimental model of the device showed that it provides uniform compression of the packing of a flange joint by the tightening force of the studs. Notes that the design of the device is characterized by high reliability in assembly of threaded joints with a controllable tightening force.
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