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...
2014 Chicago : Innovative Multi Layer Composite GSP Pressure Pipe
Author(s) : JINGDONG SHI, DEHUI LEE, STAR LEE
This article is to introduce the new designed plastic-steel-fiberglass composite pressure pipe (GSP pipe) for long distance water transportation, with max diameter 5000mm. This multimaterial composite pipe combines the steel hardness, PE anti-rust and fiberglass strength makes it long lifetime, higher pressure and...
2010 Vancouver : Comparison Between PE4710 (PE4710 PLUS) and PE100 (PE100+, PE 100 RC)
Author(s) : Dr. Gene Palermo
The scope of this paper is to clarify the various pipe material designation codes and other terms (PE 4710, PE 4710 PLUS, PE 100, PE 100 RC and PE 100+) that are used in the piping industry for high density polyethylene (HDPE) materials. These are the benchmark “high performance” HDPE materials used worldwide for a...
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...
2006 Washington DC : Introducing PE100 for Medium Pressure Gas Networks in South America
Author(s) : Belforte, Gerard, Palermo, Guerra
South America is a region with a fast increase in economic growth and energy needs,
and natural gas represents a strategic energy source not only for producers like
Argentina but also for net importers like Uruguay and source-differentiated countries
The fast development of the economy leads to request of...
2006 Washington DC : Using the CRS Concept for Plastic Pipe Design Applications
Author(s) : Palermo
The CRS (Categorized Required Strength) concept was developed within the ISO pressure
rating system to provide more flexibility to the design engineer. One of the major uses of
CRS is to provide a design basis of 100 years for plastic piping applications. With the CRS
concept plastic pipe can now have a design basis...
2004 Milan : Can ISO MRS and ASTM HDB Rated Materials be Harmonized
Author(s) : Zhou, Palermo
ISO MRS and ASTM HDB rating systems have been successfully used for more than four
decades in Europe and North America. MRS differentiates well the three generations of
HDPE materials by classifying them as PE63, PE80 and PE100. However, HDB classifies all
three generations of HDPE as only one PE 3408. When...
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...