2016 Berlin : ISO 13477 S4 testing of awwa C900 PVC pipe
Author(s) : Sunwoong Choi, Tom Marti
Small scale, steady state (S4) testing per ISO 13477 is a lab-based procedure to determine the critical pressure at which a fracture will propagate following initiation in a given pipe material filled with a given test medium. The S4 test was originally developed for the natural gas industry using air as the test...
2014 Chicago : Determining the Processing Quality of PVC Pipe by DSC – How Precise?
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...
2010 Vancouver : Utilization of Notched Ring Test for larger diameter pipes and fittings
Author(s) : Sooho Pyo, Junghyun Nam, Yoonsang Kim and Sunwoong Choi
The Notched Ring Test (NRT) has been recently developed to measure slow crack growth (SCG) in plastics pipes and fittings. The NRT specimen in the form of a notched full ring is directly obtained from the extruded pipe or injection molded fitting and has demonstrated its effectiveness in generating slow crack growth...
2006 Washington DC : Development of Notched Ring Test for Measuring Slow Crack Growth
Author(s) : Pyo, Seo, Mutter, Broutman, Choi
A novel Notched Ring Test (NRT) method for measuring slow crack growth (SCG) in plastics pipes and
fittings is developed and applied to determine its applicability as the standard test method. NRT specimen
in the form of a notched full ring, directly obtained from the extruded pipe or injection molded fitting...
2004 Milan : Manufactured Aggregate as Imported Backfill Material for Plastics Pipes
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...
2001 Munich : Cable Drawing Trough Deformed Plastic Ducts
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...
2001 Munich : Complex Yield Behaviour of PE100 Resin on Plane Strain Tensile Specimen
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...
1998 Gothenburg : Plastics Pipes - Future in the Water Industry
Author(s) : Stokes, Edwards
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...
1995 Edinburgh : Predicting long term pipe strength by uniaxial tensile testing
Author(s) : Choi
A plane strain specimen has
been developed which creates a biaxial
stress state when loaded in uniaxial tension.
A detailed stress analysis of this specimen is
presented. The stress state was generated
though the use of a groove across the width
of the specimen. Both theoretical and experimental results are presented....
1988 Bath : Evaluation of Aged Plastics Pipes Used in Natural Gas Distribution Systems
Author(s) : Duvall, Nylander, Broutman
Thermoplastic gas distribution piping has been utilized in the United States for over 25 years. However, there is little data available on how such materials age in a service environment and how such aging might affect future performance. In this program, polyethylene pipe samples that were removed from actual gas...
1982 York : Extrudate Cooling of Medium Density Polyethylene Pipe Sections
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...
Determination of Interfacial Pressure in Crimped Fitting Assemblies
Author(s) : Choi