Creep resistance and stress-cracking resistance The creep resistance of the pipe is the main basis for product design and engineering material selection. Through the creep resistance test of the pipe, the service life and stress crack resistance of the pipe can be deduced. . As we all know, under the action of external force, the metal material will be deformed elastically-plastic deformation-violently. Compared with plastic pipes, with the increase of pressure, temperature and time in the pipe, plastic deformation-brittleness will occur in the pipe. Deformation-rupture. For plastic pipes with good creep resistance, under certain ring stress and temperature, with the increase of time, the damage point will not be obvious. On the contrary, if the plastic pipe with poor creep resistance is easy to produce, there is no obvious damage point from the PEX+ pipe creep curve, indicating that the PEX+ pipe has strong stress cracking resistance and is safe for long-term use.
