2021 Amsterdam : ALLOWABLE SCRATCH DEPTH HISTORY & RECOMMENDATIONS FOR PE PRESSURE PIPE
Author(s) : Chris Ampfer, Gene Palermo, Ernest & Oren Lever
This paper looks at the origin of the 10% allowable scratch depth rule for polyethylene (PE) pressure pipe developed
in 1971 and research that has been performed over the years since its inception to determine the validity of this
rule. The 10% rule has been used by natural gas pipeline operators since the 1970’s to...
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...
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...
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...
Increasing Importance of Rapid Crack Propagation for Gas
Author(s) : Palermo, Michie, Chang
Rate Process Method Applied to Service Life Forecast of PE Molded Fittings
Author(s) : Palermo