Pipe part

摘要

A pipe part having a formed-in pipe collar and having a sealing ring which is supported in the pipe collar, is positioned in a flexible manner over an air chamber between the two supporting regions which run in an annular manner and is domed to form a sealing edge for a tip end or such like insert part, is equipped with a ventilation system in order to ensure the seal even in the case of severe or sudden load changes and in order to prevent uncontrolled sealing functions, in the case of which ventilation system at least one pressure-equalisation channel, preferably a plurality of such channels, are provided in a uniform circumferential distribution, originating from the air chamber and opening said chamber towards the end of the collar. Such a design can be achieved even with a sealing ring into which one corresponding channel is formed, it being possible for this forming-in to be carried out at the same time as forming of the ring. In the same way, a corresponding design can be achieved as early as the preforming of pipes to form such pipe parts, in that the forming channels are formed into the collar region of these pipes.