METHOD OF RELIEVING RESIDUAL WELD STRESS IN PIPE WIELDED BUTT JOINTS Russian patent published in 2012 - IPC B23K28/02 C21D7/06 B23K101/06 C21D9/50 

Abstract RU 2444423 C1

FIELD: process engineering.

SUBSTANCE: invention relates to ultrasound processing of pipeline welded butt joints. Proposed method comprises ultrasound shock-wave processing of pipe inner wall butt joints in the zone of root seam to depth of 30 to 80 mm.

EFFECT: reduced residual stress.

5 dwg

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RU 2 444 423 C1

Authors

Sidorov Mikhail Mikhajlovich

Golikov Nikolaj Innokent'Evich

Ammosov Aleksandr Prokop'Evich

Dates

2012-03-10Published

2010-07-26Filed