FIELD: machine building.
SUBSTANCE: invention relates to the assembly units with seal to produce the cast iron pipes. The assembly unit between the square end and spigot end has seal having the lock insert containing a head and a shank. The head has radial shoulder designed for abutment to surface of base of anchor slot of the spigot end, and first inclined shoulder designed for abutment to the inclined surface of the anchor slot. The head contains also frontal shoulder displaced from the first inclined shoulder and designed for abutment to the ring frontal surface of the anchor slot.
EFFECT: invention improves reliability of the connection.
11 cl, 11 dwg
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