Breivoll Inspection Technologies (BIT) has successfully developed and implemented a new in-pipe inspection method for the condition assessment of metallic water mains, mainly cast iron. The method is based on Acoustic Resonance Technology (ART). The inspection data (acoustic signals) are stored on a hard drive prior to undertaking the detailed analysis back at the office. The assessment results...

Robotics is one of the fastest growing engineering fields of today. Robots are designed to remove the human factor from labour intensive or dangerous work and also to act in inaccessible environment. The use of robots is more common today than ever before and it is no longer exclusively used by the heavy production industries. The inspection of pipes may be relevant for improving security and e...

We discuss a reaction–diffusion system modeling concrete corrosion in sewer pipes. The system is coupled, semi-linear, and partially dissipative. It is defined on a locally-periodic perforated domain with nonlinear Robin-type boundary conditions at water-air and solid-water interfaces. We apply asymptotic homogenization techniques to obtain upscaled reaction–diffusion models together with expli...

Over 124,300 heat pipes were installed in vertical support members on the Trans Alaska Pipeline System. Infrared surveys in the early 1980s revealed cold topping on some of these heat pipes. The cold topping was due to an accumulation of non-condensable gases, a by-product of corrosion or chemical dissociation of anhydrous ammonia. In 2000, Alyeska Pipeline Service Company undertook an experime...

This paper presents an overview of causes of sewer deterioration together with a discussion of control methods that can prevent or arrest this deterioration. In particular, the paper covers inlineand combined sewer overflow(CSO) storage-tank-flushing systems for removal of sediments and minimizing hydrogen sulfide production resulting in the reduction of associated pollution and sewerline corro...

Production and build-up of sulfide and methane in wastewater collections systems cause several detrimental effects including odour nuisance, health hazards due to its toxicity and corrosion of pipes and inlet structures of sewage treatment plants. On the other hand methane is a greenhouse gas significantly contributing to global warming. Despite these major impacts, sewer-produced sulfide and m...

Composite materials are being widely used in applications including marine industry where specific properties and corrosion resistance are required. Many applications have been mentioned for pipes systems on ships, offshore platforms and also for coastal engineering plant such as power stations and desalination installations. However, it was recognized that the optimum use of composite material...