FIELD: oil and gas industry.
SUBSTANCE: pipeline is placed 0.2 m above or below the ground water level, the position of the longitudinal welds is marked out from the lower or upper pipeline generatrix, and the position of the longitudinal welds is marked on the outer surface of longitudinally welded pipes used for construction or repair of pipeline, said marking is considered during installation of pipes, the longitudinal welds are oriented so the longitudinal welds of the pipelines, which placed in the designed position, have angular orientation ranging from 1.5 to 2.5 hours or from 9.5 to 10.5 hours, in this case, the ranges in which the angular orientation of adjacent tubes are placed should not coincide.
EFFECT: reduction of pipeline susceptibility to stress corrosion cracking.
2 dwg
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