FIELD: construction, pipeline.
SUBSTANCE: invention is related to the field of pipeline equipment and may be used in tubular products from composite materials, for instance, in multi-layer pipe-shells with application of glass-fibre plastic. Tight pipe-shell contains bearing external layer with collar, internal layer with annular protrusions and additional collar, between which tight layer is installed, and collars form basic plane, through the points of which direct lines are passing, which are generatrices of conical bevels of annular protrusions. The second point for generatrices binding are corresponding points of bevels starting on the external surface of bearing internal layer.
EFFECT: increase of pipe-shell reliability and durability with provision of its tightness.
3 cl, 5 dwg
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