Stokes, Edwards
# 1998 Gothenburg
The paper examines the business and regulatory background to the infrastructure investments anticipated in the next few years, from the point of view of a major UK Water Company. Past performance of the use of plastic pipes for sewers and water mains are examined. Shortcomings of the products are identified and indications as to how these might be addressed in specifications and future research developments to enable the use of the products to continue to expand.
Related papers
Author(s) : DALE B. EDWARDS, ANAND R. SHAH, DONALD E. DUVALL
Differential scanning calorimetry (DSC) has been used to study the processing of PVC pipes. This work has been largely embodied in ISO 18373-1-2007, Rigid PVC Pipes –differential scanning calorimetry (DSC) method – Part 1: Measurement of the processing temperature and Part 2: Measurement of the enthalpy of fusion for...
Author(s) : Newport, Wijeyesekara, Edwards
Research work undertaken at the University of East London has produced new forms of sustainable manufactured aggregate, which gives a backfill material which has many advantages over natural materials. The unique geotechnical properties of the aggregate make it an idea material for the laying of plastic pipes allowing...
Author(s) : Edwards, Broutman, Choi
The Alternate Methods Committee of the Plastics Pipe Institute’s Hydrostatic Stress Board (HSB) has completed development of an alternate method for determining the hydrostatic design basis (HDB) for plastic piping materials. The initial work was reported at Plastic Pipes X, in Sweden in 1998.1 An ASTM test method has...
Author(s) : Fairfield, Reid, Hounsome, Edwards, Sibbald
This paper provides estimates of the draw force needed to pull sub-ducts or cables through a series of typical ducted utility networks. Variables such as : coefficient of friction between the outside of the cable and inside of the duct, the main duct’s vertical diameter, the cable bundle or sub-duct’s external...
Author(s) : Choi, Lee, Broutman, Edwards, Palermo, Cho, Choi, Park
In recently designated plane strain grooved tensile (PSGT) methodology of ASTM F2018 standard, a groove in the direction perpendicular to the loading axis allows biaxial stress state to be generated under a uniaxial loading. The biaxial stress state produced very closely approximates the internally pressurized pipes...
Author(s) : Stokes, Potter, Muhl, Acland
Research indicates that the scoring of polyethylene pipes that can occur during directional drilling operations in clay soils will not exceed the specification of 10% pipe wall scoring depth. However, a higher level of damage may occur in different types of soils from these operations. Further investigations from...
Author(s) : Stokes, Potter, Metcalfe, Bowman, Graham
The response of three different forms of polyvinyl chloride (PVC) pipe has been explored when the pipes had attached to them ferrule straps. Pipes were subjected to fluctuating internal pressure (fatigue) loading at 20°C, and the lifetimes, location of any failures and the types of failures recorded. Tests were made...
Author(s) : Broutman, Edwards, Shah, Palermo
The Alternate Methods Committee of the Plastics Pipe Institute's Hydrostatic Stress Board (HSB) has initiated development of an alternate method for determining the hydrostatic design basis (HDB) for plastic piping materials. After reviewing several test methods, the plane-strain tensile method, developed by Choi and...
Author(s) : Stokes, Morris
At this Conference, the main focus is on the pipe : hardly surprising since this forms a large part of the material cost of a sewer, water, gas or fuel line. However, the pipe is often only a small part of the total cost of a pipeline installation. It is the jointing of the pipes to each other and to valves and pumps...
Author(s) : Edwards,Ellis, Georghiades,Smith
A model is presented for the prediction of cooling rates and temperature profiles during the cooling and solidification of M.D.P.E. pipes. Experimental measurements from an industrial production line are reported and these confirm the predictions of the model. Finally, the model is used to determine the most important...
Members of the Association
