Papers
Plastic Pipes Conference Association # 2016 Berlin
Prof. Dr. Jens Liebhold,
To take the advantages of the excellent properties of fiber-reinforced components even more economically and industrially, new ideas to implement these potentials are in demand. Only with the introduction of fibers in a plastic matrix, the elastic behavior is changed towards to higher stiffness, strength and impact strength and thus improves the component properties.
The specificity and the degree of innovation in the production of endless reinforced components is, opposite to injection molding and RTM processes, the uniform incorporation of endless fibers into a polymer matrix at a continuous extrusion process. A subsequent process step by injection molding allows the production of large-series components with high functional integration.
For infrastructure purposes, especially in the area of pipelines used in the oil and gas industry, the RTP system has been introduced to become displace more and more conventional steel pipes due to better properties in the area of corrosion resistance, flexible design and speed of installation. One of the production possibilities is the Tape Winding Technology with highly automated process for the manufacture of load-carrying structures made of continuous fiber-reinforced plastic pipes with extraordinary mechanical, physical and chemical properties.
Related papers
Author(s) : Dr. Holger Brüning, Serge Hascoët, Yann Delanne, Didier Nozahic, Jawdat Mansour, José Santana
RTE operates, maintains and develops the French electricity network, including the High and very High Voltage cable lines. Their network is the largest in Europe and includes over 6400 km of underground HV links operated in 2018. The company is modernizing and developing its network by investing 1.5 billion euros per...
Author(s) : M. Eckes & Dr. B. Baudrit, Dr. M. Troughton & D. Wylie, H. van Laak & J. Fritz
Unplasticized polyamide 12 (PA-U12) is increasingly being used in pipe applications, especially in the gas sector. However, the material behavior in the usual quality tests for pipe welds has not yet been thoroughly investigated. For this reason, two research institutes, worked in cooperation with a manufacturer of...
Author(s) : Ulrich Schulte, Dr. -Ing. Joachim Hessel
In order to protect the Austrian lakes effectively against the discharge of effluent, a 13 km long pressure pipeline made of high density polyethylene was laid on the bottom of Lake Ossiach back in 1971. The DN355 to DN200 pipes were produced from a first generation HDPE-compound. The classification would have been...
Author(s) : Alireza Sahaf Amin, Dr. Gholamreza Pircheraghi
PE-Xa pipes used in the hot water supply are required for high mechanical strength and high creep resistance at high temperature. Because of the higher cross-link degree of PE-Xa pipes as compared with other crosslinked pipes methods , these pipes which are made by peroxide crosslinking have better performance in the...
Author(s) : Dr Ruediger Liske, Dr Tobias Eltze, Dr Tania Weyland, Marie-Laure Bertet
The migration of NIAS (Non-Intentionally Added Substances) into potable water is a recurring topic for the distribution of cold and warm drinking water and related materialsindustry. These substances are chemical compounds that are present in drinking water contact materials but have not been added during the...
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....
Author(s) : Dr. Stefan Fokken
NGO pressure and end of life disposal of PVC articles in the EU over 30 years ago, triggered intense discussion about the sustainable use of PVC and its additives. Stabiliser producers and downstream users of PVC stabiliser compounds base upon Lead and Cadmium based stabilisers have developed solutions ultimately...
Author(s) : Adriana Velasquez, Dr. Dane Chang, Dr. Siddharth Athreya
This paper studies the PENT results and how they vary based on sample preparation, equipment used, technique to place the sample as well as the number of heating cycles that the resin goes through after it leaves the manufacturing facility including those cycles needed to pre-compound virgin resin with a color...
Author(s) : Marc van Loo (Dr.), Constant Van Aerschot, KumHoong Lou
In many parts of rural developing Asia and even some parts of Africa, sewerage from households is often discharged directly to the surrounding. This unfortunate fact means that many waterborne diseases such as cholera, dysentery and typhoid continue to afflict these communities. Numerous efforts from governments,...
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...
Author(s) : Dr. Love Pallon, Dr. Karin Jacobsson, Daniel Ejdeholm, Marie Allvar, Rikard Kärrbrant
This work presents the development of the Full Length Tensile Test (FLTT), a method that enables an objective judgement of welding quality of electrofusion welds by measuring the energy to break (J/mm2 ). In this way a brittle, ductile and transitional mode failure can be differentiated without subjective visual...
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...
Author(s) : Johannes de Bruin, Dr. Bert Dalmolen, Albo van Hateren
Normal High Density Polyethylene (HDPE) is commonly used as the fluid contacting element, or the “inner-liner”, in Reinforced Thermoplastic Pipes (RTP) and steel pipes up to 65 ºC. Through a modification of the HDPE polymer matrix, by adding nanoparticles, the E-modulus can be increased. Research shows that...
Author(s) : Dr. Anton Vasilenko
In today’s world a lot of energy is wasted. More than 50 % of the energy is lost on its way to the customer. The fundamental idea of modern district heating is to recycle heat that otherwise would be lost and to use renewable sources to heat homes. In other words: a market place for green heat that reduces consumption...
Author(s) : Dr. Gerd Mannebach
With a new and innovative catalyst concept it is possible to produce a bi-modal PE-RT Type II material with excellent properties in a single reactor process. The catalyst is based on two different metallocene components, whereas one component doesn’t incorporate any co-monomer and the other component shows a typical...
Author(s) : Dr. Holger Bruening, Detlef Schramm
Applications at elevated temperatures like cable conduit pipes for high voltage cables, pipelines used in oil industry or in industrial plants offer new possibilities for PE but additional requirements in such applications have to be taken into account. Long term experience in using PE100 pipes with respect to easy...
Author(s) : Univ.-Prof. DI Dr. mont. Gerald PINTER, DI Florian ARBEITER
Applying scientifically well established and investigated linear fracture mechanic methods (LEFM) the kinetics of the slow crack growth (SCG) on polypropylene layers and coextruded interfaces on multi-layer-pipes could be investigated. Taking effects of ageing and stress relaxation during the service lifetime into...
Author(s) : Dr Chris Howick
Rigid PVC (PVC-U) is a well-established material for pipe systems for drinking water, with use dating back to the 1930s. In order for PVC-U to be used in drinking water systems, manufacturers must comply with all of the relevant regulations. These include self-assessment systems, where manufacturers demonstrate that...
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....
Author(s) : Dr. Stefan Fokken
An overview of stabilizer systems for PVC pipes had been given at the last Plastics Pipes conference (PPXVII), detailing which technologies are used around the world. This presentation aims to give an update upon technology changes (replacement of Lead stabilizers by Ca-based stabilizers, situation of Tin stabilizers)...
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