FIELD: machine building.
SUBSTANCE: proposed system comprises, at least larger fitting with first end to be engaged around pipeline opening and second end with opening to be fitted therein of, at least, one pipeline plug. Said plug is integrated with fitting by, at least, three radial pins, each being made engage with, at least, one plug radial seat located at periphery. Besides, said pin has, at least, partial outer thread to engage with appropriate inner thread of male seat and engagement end extending from female seat for engagement with plug seat. Seat wall are chamfered to engage with pin engagement end.
EFFECT: higher reliability.
9 cl, 4 dwg
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