FIELD: pipe line engineering. SUBSTANCE: sealing member made of a cylindrical spacer is mounted on a pipe butt joint. Squeezing coupling provided with a ring groove having trapezoidal cross-section on its outer side is fitted on the pipe from outer side. Reducing of pipes and coupling is conducted from each of two faces of the coupling to its midpoint. Reducing forces is inclined to outer side of the coupling at an angle within 70-84°. EFFECT: enhanced reliability. 3 cl, 5 dwg
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