FIELD: mechanical engineering. SUBSTANCE: flange used for connecting the pipes with pipes for high-pressure fluid media has contact surface; when clamping bolts used for connecting the pipes are not tightened up, contact surfaces form angle directed outside and when clamping bolts are tightened up, contact surfaces are pressed to each other. Flanges may be provided with outer and inner taper sections for creating additional sealing effect and grooves for circular seal. EFFECT: enhanced reliability. 5 cl, 14 dwg
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