SLOW CRACK GROWTH RESISTANCE OF REPROCESSED PVC

Author(s) : Ajay Taraiya, Peter Degenhart, Mark Boerakker

In PPXX, a technology was presented for the first time that could bi-axially orient polyolefin pipes. With this technology, it is possible to prepare pipes that have a performance far beyond the standard ones. One approach to achieving this performance is via a continuous in-line process. To optimize the in-line...

Author(s) : Xin Zhou, Abdullah Saber, Shuqiang Wang, Huilong Chen

PE-RT II (PE100 classification) is designed >50 years lifespan at elevated temperature which aims to the growing demands on the applications of hot water and other industrial applications. District heating is a growing market in Greater China. However, the conventional pipes have serious corrosion issue in this...

Author(s) : Kevin Copher, Patrick Vibien

High Density Polyethylene (HDPE) conduit is a durable product designed to protect cables for multiple generations buried underground or encased in concrete. Conduit is subject to coiling stresses, installation stresses and in-service stresses, such as those generated from installed curvature, soil loading, or rock...

Author(s) : Robin Bresser, Ilari Aho, Shima Holder, Tijana Duric, Kaisa Suvilampi

Through innovation and experience, PEX pipe solutions have been enabling comfortable heating and safe plumbing with a successful 50-year track record. They are an important facilitator of the green energy transition and the ambitious climate targets of, for example, the European Union (EU) Green Deal by enabling...

Author(s) : Ricardo Pascual

Social awareness with aspects related to the conservation of the environment and sustainability, the acceptance by citizens of the need to reduce consumption, reuse products, repair as far as possible and, fundamentally, the action of recycling at the end of its life, facilitates the availability of recycled plastics...

Author(s) : Shane Harton, Andrew Sell, Carl Dolgow

The torque rheometer has been the standard instrument used in poly(vinyl chloride) (PVC) quality control (QC) testing for decades. ASTM D2538 has provided standard, comprehensive testing and analysis procedures since 1969 that have allowed the vinyl industry to coalesce around this simple, yet robust, set of...

Author(s) : Dr. Michael Pluimer, Sara Stone

The Notched Constant Ligament Stress test (NCLS test, ASTM F2136)[1] is a test method that measures the slow crack growth in High Density Polyethylene. The NCLS test requires a notch on all test specimens to act as a stress concentration at that point so crack propagation can be easily predicted and studied. In...

Author(s) : Jacob John, Suresh Shenoy, Patrik Roseen

Cross-linked polyethylene (PEX) pipes continue to gain popularity in plumbing and indoor climate applications around the globe. This study focuses on increasing the sustainability of PEX pipes by utilizing recycled PEX and production waste streams into PEX production. Different methods available for recycling and the...

Author(s) : Aisha Khaleel, Suleyman Deveci, Sulistiyanto Nugroho, Fatima AlHameli

The use of polyethylene pipes in transportation networks of pressurized water and gas have shown superb performance over the history. High density, high-molecular-weight, and bi-modal polyethylene materials, known as PE80, PE100 and PE100RC, have successfully served the market for many years in standard applications....

Author(s) : Jessica Hinczica, Mario Messiha, Florian Arbeiter, Gerald Pinter

In Europe, only 1.8 million tons of recycled material is processed in new products within the building and construction sector [1]. Recyclates and blends of recyclates with virgin materials are already used for different products in the plastic pipe industry, such as cable trays, or storm water management...

Author(s) : Jiyong Park, JaeHyuck Han, YoungGu Kim, Eunjin Park

This study investigates the influence of various parameters on polymer design to determine the slow crack growth. HDPE(High Density Polyethylene) materials with different molecular weight distribution and comonomer content for PE100-RC pipe were investigated with cracked round bar test. The cracked round bar test...

Author(s) : Michael Pluimer, Christian Herrild, Patrick Vibien

With enhanced interest in a circular economy and the potential use of recycled HDPE within HDPE conduit, a research project was undertaken to investigate the necessary technical requirements when using recycled HDPE. High Density Polyethylene (HDPE) conduit is a durable product designed to protect cables...

Author(s) : Paul J. Freudenthaler, Joerg Fischer, Yi Liu

The European Commission set demandingly high recycling targets which will, when followed, eventually create an increased supply of polypropylene (PP) post-consumer recyclates (PCRs). No regulations currently mandate the use of recycled PP (rPP), so the industry is challenged to explore possibilities to utilize these...

Author(s) : Antonio Rodolfo Jr., Vanderley M. John

Unplasticized (U-PVC) ABNT NBR 5647-2 regular industrial pipe samples, with nominal diameter DN 100, outside diameter 110 mm, nominal wall thickness 7.8 mm, Ca/Zn stabilized, were studied using an essential work of fracture (EWF) approach. These pipe samples were also tested for the degree of gelation via...

Author(s) : Rafael A. García-Muñoz, Rafael Juan, Mónica de la Cruz, Beatriz Paredes, Carlos Domínguez

Plastics are widely used in various industries, resulting in the generation of significant amounts of plastic waste, which causes environmental and economic problems. Although mechanical recycling is the most commonly employed technology, the resulting recyclates often suffer from degradation and contamination. This...

Author(s) : Cindy Bray

For over two decades, the plastics pipe industry in Australia has aimed to recycle the maximum amount of usable plastic pipe and other suitable materials into new plastic pipes through programs such as take-back schemes and providing collection facilities on manufacturing sites. In Australia long-term sustainability...

Author(s) : Tobias Johnsen, Ole Grøndahl Hansen

With a growing global population that will primarily settle in urban areas, more and more agricultural land will be converted into dwellings, roads etc. As the demand for food in 2050 will be 60% greater than today, a conflict between Sustainable Development Goals 2 (Zero Hunger) and 11 (Sustainable Cities and...

Author(s) : Gerald Pinter, Lukas Travnicek, Johannes Wiener, Jan Poduska, Florian Arbeiter, Pavel Hutar

Crack initiation and subsequent crack growth are known to be the key factors which determine the final lifetime of a polymeric pipe. Subsequently, exact knowledge regarding the crack growth behavior is a key issue to guarantee safe operation. Furthermore, novel concepts are needed to satisfy increasing demands, for...

Author(s) : Dr. Tania Weyland, Dr. Tobias Eltze, Dr. Rolf Wittlinger, Marie-Laure Bertet, Gregor Huber

A significant amount of water is lost in transit from the water treatment plant to the consumer. A major cause of water leakages is the deterioration of assets including the use of disinfectants. Using chlorine-based disinfectants is known to be extremely effective in eliminating waterborne pathogens, but they also...

Author(s) : Roland Valk, René Hermkens, Sjoerd Jansma

The use of hydrogen gas as an energy carrier is seen as a key component of the energy transition. This creates new challenges, including in relation to the transport and distribution of this gas. The low-pressure (natural) gas distribution grid in the Netherlands currently consists of 64% PVC and is presumed to be...