Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.


Comparison of novel testing methods for determination of slow crack growth in PE 100

 

Posters

Plastic Pipes Conference Association # 2010 Vancouver

Christian Tischler, Markus Haager, Thomas R. Kratochvilla, Heinz Muschik, Heinz Dragaun

The static test method of the Notched Ring Test (NRT) is compared with a fatigue testing method of Cracked Round Bar (CRB). Both methods are candidates for the classification of polyethylene (PE) materials with high resistance against Slow Crack Growth (SCG). In this paper tests of two PE 100 and two PE 100-RC materials are presented.

Please note that the whole article content is available on PPCA website only :

Related papers

2021 Amsterdam : ADVANCING 1-HEXENE-BASED PP-RCT: PIPE APPLICATION EXAMPLES AND NEXT CHALLENGES

Author(s) : Simona Africano, Emanuele Burgin, Thomas Boehm

Since the ‘80s, Polypropylene-Random (PP-R) has been a material of choice for producing plastic pipes for Hot & Cold water installations. Compared to other polyolefins, PP-R has higher stiffness and higher temperature resistance, along with the typical advantages of plastic pipes such as light weight, fast and...

2021 Amsterdam : INNOVATIVE MILLIMETER WAVE TECHNOLOGY FOR MEASURING THE PIPE WALL THICKNESS EARLY IN THE EXTRUSION PROCESS

Author(s) : Christian Schalich

Plastic pipes for infrastructure and building applications are precisely specified with regards to wall thickness and diameter. Pipe manufacturers use different measuring methods in order to ensure the required dimensional accuracy and maintain a constant high quality. This paper introduces a measuring system based on...

2021 Amsterdam : MODIFIED PLAIN STRAIN GROOVED TENSILE TEST TO EVALUATE LARGE DIAMETER PE PIPES

Author(s) : Thomas R. Kratochvilla, Patrick Grünbeck, Christoph Bruckner, Raimund Eremiasch, Harald Wilhelm, Mario Vukelja

In the last decades pipe dimensions of extruded PE pipes have reached new orders of size. Today, PE pipes with outer diameters of up to DN/OD 3500 mm are produced and used for pressure pipe applications like seawater intake/discharge, outfall, sewage and industrial process piping systems. To test the long-term...

2021 Amsterdam : SLOW CRACK GROWTH RESISTANCE OF REPROCESSED PVC

Author(s) : Andreas Frank, Mario Messiha, Günter Dreiling, Norbert Schuler, Jens-Martin Storheil, Erwin Mayrbäurl, Stuart Ramella, Frank Krause, Rudi Berning, Philippe Gabriëls, Alpay Aydemir, Thomas Koch, Florian Arbeiter, Gerald Pinter

The Cyclic Cracked Round Bar (CRB) Test has been applied to study the slow crack growth (SCG) resistance of virgin, recycled, and reprocessed PVC-U. This fracture mechanical test allows a quick ranking of the SCG resistance of PVC-U. A clear correlation between the K-value and the SCG resistance has been elaborated....

2021 Amsterdam : WHY PA-U12 HIGH PRESSURE PIPES DO NOT CARE ABOUT “ROCK ́N ́ SHARD” IN VIEW OF PAS 1075

Author(s) : Hermann van Laak, Jan Heimink, Mario Messiha, Andreas Frank, Christoph Bruckner, Thomas Kratochvilla

For high pressure pipes above maximum operation pressure of 10 bar, this paper emphasizes PA-U12 as the easy to install alternative to steel. It underlines the superb performance of PA-U12 pipes for alternative installation techniques without need for a separate mechanical protection. An unplasticized polyamide 12...

2018 Las-Vegas : Accelerated pipe test methods to evaluate PE 100-RC materials - Possibilities for iso standardisation

Author(s) : Thomas R. Kratochvilla, Raimund Eremiasch, Christoph Bruckner

In the last years effort has been made to develop and standardise new accelerated test methods to evaluate PE 100-RC materials in short times in form of test bars. The two most important developments, the cracked round bar test (CRB test) and the strain hardening test (SH test) were published as final ISO standards...

2018 Las-Vegas : Characterization of post-use polyethylene and polypropylene recyclate blends for pipe applications

Author(s) : Markus Gall, Reinhold W. Lang, Joerg Fischer, Ansgar Niehoff, Steven Schmidt

Despite recent efforts in promoting the utilization of recycled polymeric materials for more diverse and more advanced applications, there are still significant knowledge gaps with regards to the applicability of certain recyclate types for specific “re-use” purposes. When it comes to pipe applications, for instance,...

2018 Las-Vegas : Guidelines for corrugated HDPE pipes manufactured with recycled materials for highway culvert and storm drain applications

Author(s) : Michael Pluimer, Richard Thomas

Over the past decade, there have been several key research projects to evaluate the performance of corrugated HDPE pipes manufactured with post-consumer and postindustrial recycled materials for highway and railroad drainage applications. Three of these projects were recently completed and published (NCHRP Project...

2018 Las-Vegas : Innovative millimeter waves technology for measuring diameter, ovality, wall thickness, and sagging of large plastic pipes

Author(s) : Christian Schalich

This paper introduces a new technology based on millimeter waves. It provides a noncontact, non-destructive, online measurement of inner and outer diameter, ovality, wall thicknesses, and sagging (sagging of the melt during solidification at a too high viscosity) of large plastic pipes during the extrusion...

2018 Las-Vegas : Molecularly oriented awwa C909 pipe for seismic applications

Author(s) : Richard St-Aubin, Dr. Thomas O’Rourke, Dr. Brad Wham, Blake Berger

Molecularly oriented polyvinyl chloride (PVC-O) pipe has been found to withstand large ground deformation during seismic events without damage. The properties of PVC-O pipe that support this performance have been investigated in a multi-year testing program undertaken at the Geotechnical Lifelines Large Scale Testing...

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....

2018 Las-Vegas : The world's first class 3 safety related nuclear PE4710 piping project - 10 year review

Author(s) : Lonnie Corley, Dane Chang, Harvey Svetlik, Matt Brandes, Thomas Musto, Frank Schaaf, David Fink

This paper presents a brief overview of a challenging project at the Callaway Nuclear Power Plant where HDPE was utilized to replace degraded steel buried piping in a Safety Related water system. Callaway was the first Nuclear Power plant to obtain NRC approval and successfully place the HDPE piping system into...

2016 Berlin : A combination of accelerated test methods to evaluate new generation resins for disinfectant- resistant polyethylene pipes

Author(s) : Francis Reny Costa, Anh Tuan Tran, Jeroen Oderkerk, Thomas Hjertberg, Christophe Salles, Ulf W. Gedde, Benjamin Rabaud, Flavia Zraick

The premature failure of polyethylene pipes in contact with high chlorine and chlorine dioxide, used as residual disinfectants in drinking water distribution, remains an area of concern for water companies particularly in regions where temperatures are regularly or seasonally high. Multiple factors can amplify the...

2016 Berlin : Mechanical stabilization of rigid PVC compositions

Author(s) : Thomas C. Pedersen, Robert R. Kwapisz

This paper presents rheological data on simple rigid PVC compositions lubricated paraffin wax, calcium stearate, and oxidized polyethylene wax. These three materials comprise the most widely used lubricant system for rigid PVC in North America. The influence of certain paraffin wax characteristics will be discussed....

2016 Berlin : Potentials of terahertz technology for the inspection of plastic pipes

Author(s) : Stefan Kremling, Thomas Hochrein, Peter Heidemeyer

In plastics industry, the use of terahertz technology opens up opportunities for novel non-destructive and contactless testing applications. For example, the thickness of individual layers of a foamed multilayered plastic pipe can be monitored contactless and continuously during the extrusion process. Furthermore,...

2016 Berlin : Predicting service life for recycled PE materials via the unnotched constant ligament stress (UCLS) test

Author(s) : Michael Pluimer, Rick Thomas

A new test method was developed to evaluate the stress crack resistance of HDPE materials containing recycled content. The method involves testing un-notched specimens in an elevated temperature bath under a specified stress. The new test method was published in March of 2016 as ASTM F3181, Standard Test Method for...

2016 Berlin : The new dimension of pipe extrusion

Author(s) : Brigitte Diekhaus, Ralf Mickley, Dr. Henning Stieglitz, Heinrich Dohmann, Dr. Markus Bornemann

The paper offers an overview of systems and components for efficient pipe extrusion, particularly for larger and thick-walled pipes. It introduces several possibilities for lower melt temperatures and internal pipe cooling. Together these systems can significantly reduce sagging and cooling length needed in the line....

2014 Chicago : 150 Years Lifetime on PE-Piping Systems for Drinking Water, Can It Be Achieved?

Author(s) : Tomas Helenius, Karin Jacobson, Thomas Blomfeldt

Polyethylene is the leading material for new installation of drinking water pipes in Sweden. The material is recognized by the market as a flexible, light weight and an inexpensive solution. The material is ideal for water piping, however the lifetime is only guaranteed for 50 years. This is a problematic limitation...

2014 Chicago : Comparison Between the Stepped Isothermal Method (SIM) and Conventional Creep and Creep Rupture Tests on Polypropylene Used In Corrugated Drainage Pipe

Author(s) : Bill R. Vanhoose, Jarrett A. Nelson, Christa K. McNish, Richard W. Thomas

The Stepped Isothermal Method (SIM) is a form of Time-Temperature Superpositioning (TTS) that involves measuring the creep rate of a sample while it is subjected to a series of isothermal temperature steps. The accelerated temperature results can then be shifted back to room temperature to produce a master-curve....

2014 Chicago : Designing Color Masterbatches to Meet the Demands of the Application

Author(s) : Andy Ethridge, Meril Maman, Dr. Markus Grob, White G. Jee

Color masterbatches or concentrates have been in use with plastic pipes as a means of color coding for identification of pipes by application. The color masterbatch contains not only color pigment(s), but also other ingredients that are necessary to protect the pipe during production and assure long-term durability....

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE