What are the benefits of PE water supply pipe stretchability to itself

PE water supply pipes have stretchability, so what are the benefits of PE water supply pipe stretchability for PE water supply pipes? Here is a brief talk about the benefits of stretchability. Fire-fighting steel-plastic composite pipe

High molecular polymers have the widest range of mechanical properties among all known materials. This is due to the fact that high polymers are composed of long chain molecules and have obvious relaxation characteristics in molecular motion. For example, high polymer materials have a relatively high elongation rate. Generally, the elongation at break of PE is 90% to 950%. Through a special manufacturing process, the elongation rate of some materials can be above 1000%. The elongation at break of the material is mostly between 50% and 100%. Generally, heat shrinkable films and stretched films have higher requirements for the tensile properties of materials.