Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 36 for “"Pipe Material"”.
-
Urban stormwater runoff contamination associated with gutter and pipe material degradation
… to typical stormwater pollutant sources (erosion materials, automotive activity, landscaping chemicals, pet wastes, etc.), urban stormwater runoff can also be contaminated with substances that leach from materials with which the water contacts as the rain water travels through an urban area to the …
-
Effect of Water Chemistry, Pipe Material, Temperature and Flow on the Building Plumbing Microbiome and Opportunistic Pathogen Occurrence
… and those of building-level features, such as pipe materials. To this end, standardized pipe rigs were deployed at the treatment plants and in distal portions of the water distribution system at five water utilities across the eastern U.S. Source water and treatment practices appeared to be the …
-
Experimental investigation of leakage-induced pipe erosion outside of pipe leaks
… in various different forms, and they form in pipes of all materials. It has been observed in numerous cases around the world that pipe material has been removed from the pipe surfaces adjacent to leaks in excavated failed water distribution pipe specimens. It was proposed by various …
-
Self-installation of drip irrigation emitters for prototype emitter testing
… of piping. Different types of adhesive and pipe material combinations were tested, and I selected three combinations for further testing. Performance similar to factory-installed drip emitters was achieved at low pressure, but the necessary watertight seals repeatedly burst at higher water …
-
Towards Optimization of Residual Disinfectant Application for Mutual Control of Opportunistic Pathogens and Antibiotic Resistance in In-Building Plumbing
… complex environment, in which the choice of pipe material has cascading effects on water chemistry and the corresponding premise plumbing microbiome. This, in turn, has broad implications for the control of OPPPs, which need to be elucidated through controlled experiments in which worst case …
-
Renewal Engineering Technologies for Drinking Water and Wastewater Pipeline Systems - A State of the Art Literature and Practice Review
… have been made in water and wastewater pipe renewal technologies that have allowed utilities to utilize innovative renewal techniques that decrease project costs, the impact of the project on the surrounding citizens and environment, and allow for expedited pipeline renewals compared to …
-
The effect of viscoelastic deformation in pipe cracks on leakage response to variations in pressure
… affecting the pressure-leakage relationship is pipe material behaviour (Van Zyl & Clayton 2007; Greyvenstein & Van Zyl 2007). The pressure – leakage relationship has been described by several relationships such as the Torricelli equation, the Fixed and Variable Area Discharge (FAVAD) concept and …
-
Optimisation of collector locations and pipe networks for dish–Rankine power plants
… collector placement, energy transport network pipe diameters, and network branching, accounting for shading, network heat loss, network pressure drop, network capital costs, and land costs. The thermal performance of the optimised collector field is assessed against respective fields comprised …
-
Optimisation of collector locations and pipe networks for dish–Rankine power plants
… collector placement, energy transport network pipe diameters, and network branching, accounting for shading, network heat loss, network pressure drop, network capital costs, and land costs. The thermal performance of the optimised collector field is assessed against respective fields comprised …
-
A Discrete Choice Mean Variance (EV) Cost Model to Measure Impact of Household Risk from Drinking Water Pipe Corrosion
… hole that forms in copper, drinking-water pipes. These leaks can cause substantial damage and cost homeowners thousands of dollars in repairs. Since pinhole leaks are not related to the age of pipe material, a homeowner is subject to the risk of additional costs if a pinhole leak occurs …
-
Critical factors controlling regrowth of opportunistic pathogens in premise plumbing
… pluming. In order to examine the influence of pipe material, disinfectant type, and water age on occurrence and persistence of the target microorganisms, triplicate simulated distribution systems (SDSs) comparing iron, cement and PVC pipe materials were fed either chlorinated or chloraminated …
-
Sorption and desorption of the industrial chemical MCHM into polymer pipes, liners and activated carbon
Polyethylene pipes and epoxy or polyurethane linings are increasingly used in drinking water infrastructure. As a recent introduction to the water industry, there are still many unknowns about how polymers will behave in the distribution system specifically relating to sorption and desorption of …
-
A Comparison of Risk Assessment Models for Pipe Replacement and Rehabilitation in a Water Distribution System
… distribution system is composed of thousands of pipes of varying materials, sizes, and ages. These pipes experience physical, environmental, and operational factors that cause deterioration and ultimately lead to their failure. Pipe deterioration results in increased break rates, decreased …
-
Reliability analysis and service life prediction of pipelines
Pipelines are extensively used engineering structures for conveying of fluid from one place to another. Most of the time, pipelines are placed underground, surcharged by soil weight and traffic loads. Corrosion of pipe material is the most common form of pipeline deterioration and should be …
-
Accumulation of Lead by Biofilms in Drinking Water Distribution Systems
… systems, even after the removal of lead pipes. This study used a simulated water distribution system containing a lead source pipe and various pipe materials with periodic flow and stagnation conditions of a typical household to create, characterize, and determine lead accumulation …
-
A reliable & autonomous robotic in-pipe leak detection system
… the major factor for unaccounted losses in every pipe network around the world (oil, gas or water). In most cases the deleterious effects associated with the occurrence of leaks may present serious economical and health problems. Therefore, leaks must be quickly detected, located and repaired. …
-
Reliability estimation and risk-cost optimisation of underground pipelines
… design. A large section of underground pipelines in the UK are classified as structurally deficient and functionally obsolete. Due to low visibility, condition assessment and rehabilitation of underground pipelines are frequently neglected until a catastrophic failure occurs. Providing …
-
Numerical analysis of a shear ram and experimental determination of fracture parameters
… from becoming unmanageable. The increased drill pipe material strength, the fact that its diameter and wall thickness are eventually optimized (larger and heavier pipe sizes) and the greater water depths in combination with the high drilling fluid density affect the BOP's ability to shear. This …
-
Local plastic deformation in pressure and tensile armour layers of flexible risers
<p>Flexible pipes are commonly used for connecting seabed flow-lines to floating production facilities. The general riser design consists of an internal carcass for collapse resistance, a polymer fluid barrier, carbon steel interlocked circumferential pressure armour layer for resisting internal …
-
Development of Wastewater Pipe Performance Index and Performance Prediction Model
… benefits. Accurate prediction of wastewater pipe structural and functional deterioration plays an essential role in asset management and capital improvement planning. The key to implementing an asset management strategy is a comprehensive understanding of asset condition, performance, and …
Page 1 of 2