Buried and operating district heating (DH) pipes are exposed to thermal degradation of their polyurethane (PUR) insulation over time, status is hard assess without excavation. By using DH pipe valves in manholes as measurement points during a shutdown with an ensuing cooling period, non-destructive assessments can be performed. This study compares new improved field measurements numerical simul...

Abstract The experimental work of this study deals with the performance pipe in sand various responses subjected to incremental static loading where backfill is reinforced two types reinforcement (geogrid and geocell) investigate effects cover. pipes considered are installed different densities; i.e., loose, medium dense sand, a constant burial depth (2D, D diameter). It was concluded that maxi...

For older water pipeline materials such as cast iron and asbestos cement, future pipe failure rates can be extrapolated from large volumes of existing historical failure data held by water utilities. However, for newer pipeline materials such as polyvinyl chloride (PVC), only limited failure data exists and confident forecasts of future pipe failures cannot be made from historical data alone. T...

Buried continuous pipelines are prone to failure due permanent ground deformation as a result of fault rupture. Since the mode is dependent on number factors, probabilistic approach necessary correctly compute seismic risk. In this study, novel method estimate regional risk buried presented. The assessment thereafter illustrated for gas in City Victoria, British Columbia. example considers haza...