METHOD OF REPAIR OF PIPE LINE DEFORMED BY FLEXIBLE STRAIN Russian patent published in 1997 - IPC

Abstract RU 2076988 C1

FIELD: repair of pipe lines, mainly oil pipe lines. SUBSTANCE: trench 1 is opened over length of section of local loss of stability in wall of pipe 5 in compressed zone of bend and two bandages 4 are fitted on side of weld 2 and corrugation 3. Metal rods 6 are welded to one bandage 4 and are heated to preset temperature, after which free ends of rods are welded to other bandage in heated state, with rods located in zone of longitudinal strength of wall of pipe 1. EFFECT: reduction of stresses in circular welds of deformed sections of pipe. 2 dwg

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RU 2 076 988 C1

Authors

Sharygin V.M.

Kirkin V.S.

Dates

1997-04-10—Published

1994-08-30—Filed