METHOD TO FORM CLAMPING RING AND CLAMPING RING Russian patent published in 2012 - IPC F16L47/22 B29C57/04 B29C65/68 

FIELD: machine building.

SUBSTANCE: to form a clamping ring, at first a pipe is extruded. The extruded pipe is cut to form a pipe part. When the pipe is extruded, its inner diametre is formed as smaller than the outer diametre of the pipe, onto which the clamping ring is installed prior to arrangement of the pipe joint. The inner diametre of the specified part of the pipe is increased by removal of a material from the inner part of the specified part of the pipe, but only in that part of its length, where a stop edge is formed. The clamping ring is used on the pipe when doing a pipe joint.

EFFECT: simplified manufacturing.

7 cl, 3 dwg