FLUID SUPPLY PIPE Russian patent published in 2021 - IPC F16L21/06 B21D41/02 B21D15/06 

FIELD: pipeline systems.

SUBSTANCE: invention relates to a fluid supply pipe. The pipe contains a connecting part with a locking rib on the outer peripheral surface of the pipe. The locking rib has a lower curved part extending from the outer peripheral surface, a vertical wall part extending from the specified lower part, a curved part extending from the vertical wall part, and an upper part extending from the specified curved part. The vertical wall part passes upwards at an angle of at least 65°, but not more than 90° relatively to the specified outer peripheral surface and has an increased hardness.

EFFECT: high reliability and durability of the pipe is ensured.

2 cl, 13 dwg