Dynamic Leakage: Physical Study of the Leak Behaviour of Longitudinal Slits in MDPE Pipe

The use of plastic pipes within water distribution systems is viewed as a highly effective means to reduce our unsustainable levels of leakage. However, attention is required to understand the complex behaviour of leaks that do occur in this viscoelastic pipeline material. Results from a novel experimental investigation into the dynamic leakage behaviour of longitudinal slits in MDPE pipe are presented in this paper, reporting on the relationship between pressure head, leak flow-rate, leak area and material strain. The results show the significant time dependent leak behaviour, also highlighting the correlation between measured strain and area.