Flange of the working on tubes comprising several parts.

摘要

Device for working tubes, comprising a flange (5) recessed on the inside, with plates (13A, 13B, 13C) joined together so as to be pivotable, up to a closed position in which these plates are joined to form a crown, and a locking device for the flange. The adjacent ends of two plates have mating surfaces forming a connection by positive locking, this connection being active in the vicinity of the closed position of the flange (5). Each positively locking connection comprises two complementary surfaces (37) coming into mutual contact in the closed position of the flange. The locking device comprises at least one latch that can be actuated in this position, which acts on the adjacent ends of the plates to clamp their complementary contact surfaces against one another.