2018 Las-Vegas : Large pressure pipe system – Fully PE100
Author(s) : Sverre Tragethon, Martin Andersson
Global mega trends push for investments in sewage treatment capacity & efficiency. A trend is to go for central regional treatment sites, typically remotely located from dense populated cities. This calls for high capacity pressure sewage transmission pipelines. Reliable operation is of course of paramount importance...
2018 Las-Vegas : Slow crack growth resistance of non-virgin polymers
Author(s) : Andreas Frank, Isabelle J. Berger, Mario Messiha, Carl-Gustaf Ek, Norbert Schuler, Jens-Martin Storheil, Erwin Mayrbäurl, Steve Heeley, Frank Krause, Lodewijk Niemöller, Philippe Gabriëls, Yogesh S. Deshmukh, Florian Arbeiter, Thomas Koch, Gerald Pinter
In order to improve the circular economy of polymers in terms of sustainability and reduced carbon footprint, the increased use of recyclates has become a topic of major importance. Due to their long design lifetimes, pipe applications represent an excellent opportunity to create added value to non-virgin polymers. In...
2016 Berlin : Advanced applications for HDPE pipes with new PE-RT material
Author(s) : Wes Long, Carl F. Baker
Canfor’s Prince George Pulp & Paper Mill in Prince George, BC, Canada operates a bleach plant effluent system for the production of Bleached Kraft Pulp. The original underground fiberglass reinforced pipe (FRP) presents an elevated risk to both environment and production targets. Over the past five years there have...
2016 Berlin : Pent study of cross-linked polyethylene pipe resins
Author(s) : Carl F. Baker
The performance of HDPE resins with regards to slow crack growth has increased dramatically over the past two decades. The most common test method for pipe products is ASTM F1473, Standard test Method for Notch Tensile Test to measure the resistance to Slow Crack Growth of Polyethylene Pipes and Resins (PENT). Results...
2014 Chicago : Polypropylene Multi Layer Pipe Lifetime Assessment Under Realistic Loading Conditions
Author(s) : Florian Arbeiter, Martin Ševčík, Gerald Pinter, Frank Andreas, Pavel Hutař
Multi-layer pipes made from polypropylene have been widely used in sewerage applications for several years. Due to good material properties and generally low mechanical loads not many critical failures occur. Aim of this work is to determine, whether slow crack growth, consisting of crack initiation and crack growth,...
2012 Barcelona : Effect of the residual stresses on the slow crack growth
Author(s) : Pavel Hutař, Martin Ševčík, Jaroslav Kučera, Michal Zouhar, Robin Luky, Luboš Náhlík
Using linear elastic fracture mechanics a new methodology for a lifetime assessment of internally pressurized polymer pipes was developed. The concept is based on the numerical calculation of stress intensity factors for pipes under different loading conditions in combination with experimentally determined creep crack...
2004 Milan : Large Diameter Spirally Wound PP Sewerage Pipe Installation in Sicily
Author(s) : Barresi, Ek
The underground installation in Canicattì Municipality in Sicily is a combined sewerage and
rainwater system of a very specific design. The complete system is manufactured by Simplast
using a new generation PP material and the Weholite spiral wound pipe solution licensed
from KWH Pipe. The design meets the range of...
2001 Munich : Ensuring the Highest Quality in PE 100 Pressure Piping Materials
Author(s) : Scheelen, Tauber, Berndtson, Lackner, Bertrand, Bilda
Founded on February 24, 1999, the PE100+ Association is an industry organisation of
several polyethylene (PE) manufacturers whose objective is to guarantee consistent quality
at the highest level in the production and use of PE 100 pipe material.
The authors describe the current situation in terms of European...
2001 Munich : Multimodal Design of Thermoplastic Pipe Material
Author(s) : Berthold, Boehm, Enderle, Lackner, Lilge, Schulte
The new generation pipe materials PE 100 are now well positioned in the market because
of their unusual combination of mechanical properties. Major advantages are high resistance
versus slow crack growth combined with superior stiffness. These new PE 100 resins show
very high long term hydrostatic strength for...
A New Complete PEX-A Pipe Production Concept with Infrared Crosslinking
Author(s) : Martin Deters