Method for producing permanent pipe connection uses press-fitting, inside which sealing ring is mounted which is treated to reduce its volume so that it fits its groove when fitting is pressed into place

摘要

The method for producing a permanent pipe connection uses a press-fitting, inside which a sealing ring is mounted. In addition to the normal compression stage, the ring is subjected to a separate treatment to reduce its volume so that it fits its groove when the fitting is pressed into place. This treatment may be heating or chemical treatment.