FIELD: pipe line engineering. SUBSTANCE: pipe has a ring thickening at a distance from its end, and the tip is provided with a valving member with flexibly deformable means. The outer side of the tip has the first and second cylindrical portions separated with the means for axial stop. The valving member comprises a ring which can bear on the axial stop. The valving means includes at least one valving lag with the first portion connected with the ring and the second portion defined by the front lengthening of the first one and provided with plane inclined from the front portion to the rear portion and lateral slot. EFFECT: enhanced reliability. 10 cl, 13 dwg
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