METHOD OF "PIPE - PIPE PLATE" ASSEMBLY CONNECTION BY FRICTION WELDING Russian patent published in 2014 - IPC B23K20/12 B23K31/02 

FIELD: metallurgy.

SUBSTANCE: washer is fitted at the ends of pipe and pie plate, its outer surface having conical and cylindrical parts and ID being equal to pipe flow area. First, pipe edges and pipe plate holes are machined to make inner conical surface of "pipe - pipe plate" assembly with skew angle corresponding to that of washer conical surface. Washer cylindrical part OD is smaller than maximum diameter of said inner conical surface of the assembly. Washer is turned at pressure force and stopped at cogging.

EFFECT: higher quality of joint.

2 cl, 1 dwg