FIELD: hermetic coupling of pipe lines in transport power plants. SUBSTANCE: proposed detachable joint includes additionally two sealing bands and intermediate part made in form of cylinder coaxial relative to pipe union. Its outer surface has circular projection located between free ends of pipe union and union nut. Unidirectional thread is provided on either side from circular projection of intermediate part. This thread forms threaded joint with mating part on inner surface of cylindrical part of pipe union and on inner surface of cylindrical part of union nut. Sealing band made in form of taper gasket is second sealing band which is located between first sealing band, type "ball over cone" and third sealing band. Third sealing band is made in form of circular gasket. EFFECT: enhanced reliability and degree of tightness. 1 dwg
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