FIELD: pipelines.
SUBSTANCE: invention relates to a seal for a coupling connecting pipeline elements and has inclined surfaces at the outer surface. Inclined surfaces are located in diametrically opposite pairs, which are located in three-hour and nine-hour positions at joint between segments forming coupling.
EFFECT: inclinations are supposed to reduce jamming of seals between segments, when segments are attracted together, compressing seals for formation of fluid-tight connection of pipeline.
32 cl, 25 dwg
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