Peter Verlaan
Papers # 2018 Las-Vegas
Ten years ago, The European Plastic Pipes and Fittings Association (TEPPFA) has taken the initiative to prepare a draft 'Standard for Infiltration units' based on existing national specifications, at that time (in particular) available in France, Germany, United Kingdom and the Netherlands.
This draft 'Standard for Infiltration units' was taken over by CEN TC155 (European Committee Standardization -Technical committee Plastics piping systems and ducting systems) as starting point and active work-item for CEN TC155 WG26 (Systems for storm water handling) after a positive enquiry. After nine years deliberation, the WG arrived at a compromise with a completely modified structure. Instead of 1 product standard, three standards were prepared, under which one product standard and two test standards, which go mid 2018 under Formal Vote.
The three prEN's are:
- FprEN 17152-1; Plastics piping systems for non‐pressure underground conveyance and storage of non‐potable water — Boxes used for infiltration, attenuation and storage systems — Part 1: Specifications for storm water boxes made of PP and PVC‐U;
- FprEN 17151; Plastics piping systems for non‐pressure underground conveyance and storage of non‐potable water — Test method for determination of long-term compression strength of boxes;
- FprEN 17150; Plastics piping systems for non‐pressure underground conveyance and storage of non‐potable water — Test method for determination of short-term compression strength of boxes.
Three standards, developed by TC155 WG26, are going for Formal Vote during the Plastic Pipes Conference XIX.
The combination of these three standards is representing the minimum requirements for boxes and a unified way of testing for boxes used in underground infiltration, attenuation and storage systems according to the most recent insights by experts all over Europe.
The 'short-term test standard' describes a test method where one infiltration unit will be pressed between two stiff plates till failure in about 10 minutes.
- This test assures a proper quality control with the advantage that the results between different series can be compared easily.
- Test institutes, laboratories and the industry can adopt these tests for unified process control.
The 'long-term test standard' describes a test method and calculation method to determine the maximum design load under which a unit will last for at least 50 years.
- The big advantages for designers and customers is that the value of the maximum load becomes comparable between different designs and materials.
- The method of testing is well defined.
- The test provides a sound statistical approach. Companies producing and selling these products get clear guidelines.
The 'product standard' defines and specifies the minimum requirements for these boxes.
- The materials which can be used (PP or PVC) are well defined, including non-virgin and mineral modified materials.
- The minimum requirements for materials are always set in relation to the properties of the materials used and tested for long term.
- The combination of requirements on the material, mechanical, and physical characteristics are thought to give reliable and durable products and decrease the risks of premature failures.
Related papers
Author(s) : Sjoerd Jansma, René Hermkens
More than 20,000 km of rigid PVC (or PVC-U) pipes are currently in use for the distribution of natural gas in the Netherlands. In this decade, the majority of these pipes will reach their initially specified lifespan of 50 years. In the light of a possible replacement surge, it is increasingly important to identify...
Author(s) : Ernst van der Stok
For PE 100-RC, two tests are still under development for pipes: the point load test (PLT) and the accelerated notch pipe test (aNPT). The PLT was developed by a project group consisting of manufacturers and end users. The PLT determines the resistance to point loads as they can occur in practice. An earlier study...
Author(s) : S. Nestelberger, J. Cheng
The Point Load Test (PLT) [ 1, 2] was designed to simulate the SCG (slow crack growth) failure initiated by a rock pressing into the exterior wall of a polymer pipe. Today’s PE materials sustain long PLT testing times, due to its high SCG resistance design. Consequently, an accelerated “PLT+” with the support of...
Author(s) : Mario Messiha, Britta Gerets, Jan Heimink, Andreas Frank, Florian Arbeiter, Gerald Pinter
A majority of field failure of viscoelastic plastic pipes can be attributed to slow crack growth (SCG) and has become crucial in terms of characterization of newly developed materials – particularly, if they are designed for pressurized pipe applications. In this study, investigations in terms of SCG resistances...
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...
Author(s) : Xinwen Yu, Aimin Xiang, Dongyu Fang, Peck Tze Kang, Jinghui Li
The Chinese PE water pipe market has developed significantly in recent years and particularly over the last 12 months. Against a background of water scarcity and growing urbanization, this evolving market has grown significantly in both size and quality awareness. On the back of past experiences, a fundamental...
Author(s) : Ludo Debever, Peter Sejersen
The European Plastics Strategy is a priority for the European Union. Recycling more post- consumer plastics (PCRs) is paramount. That is why the Circular Plastics Alliance has been established. The alliance gathers public and private stakeholders in the plastics value chains to promote voluntary actions and...
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) : Hua Ye, Sun Jin, Wei Ruoqi
As a safe, clean, low-carbon and reliable energy source, nuclear power, together with hydropower and coal power, constitutes the three pillars of the world's energy supply and play an important role in the world's energy structure.With the strong support of national policies, China's nuclear energy has entered a new...
Author(s) : Britta Gerets, Mirko Wenzel, Kurt Engelsing
The strain hardening test (SHT, ISO 18488 [1]) becomes increasingly important for the characterization of high-density polyethylene (HDPE) grades and pipes made thereof. With regard to small pipe diameters, a smaller test specimen than the one defined in ISO 18488 has been developed. SHT results were demonstrated to...
Author(s) : John M. Kurdziel
The use of recycled plastics in high density corrugated polyethylene pipe for storm sewers, highway culverts and general land drainage applications has now been widely accepted by municipalities and transportation agencies. This acceptance has made it possible to convert what was once considered a single use plastic...
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...
Author(s) : Jörg Wermelinger, Sunwoong Choi
In the development of an international standard on non-destructive test for polyethylene electrofusion socket (EF) joints, the inspection capability of the phased array ultrasonic test (PAUT) in assessing flaws in the joints was needed to establish procedure qualification of the test method. For this, a worldwide...
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 in...
Author(s) : Mario Messiha, Andreas Frank, Isabelle J. Berger, Jan Heimink, Hermann van Laak, Florian Arbeiter, Gerald Pinter
Since the last decade polyamide 12 (PA12) has been successfully introduced as material for SDR 11 gas piping systems up to 18 bar, representing itself as an attractive alternative to steel pipes for high-pressure applications. Practical experience has confirmed that beside the higher strength, PA12 pipe grades also...
Author(s) : Davidovski Zoran
To get a deeper insight in why plastic pipes systems in some cases are deselected by designers, installers and users, European Plastics Pipes and Fittings Association (TEPPFA) initiated a research including interviews in four pilot countries: Poland, France, Germany and the UK. The first phase was concentrating on...
Author(s) : Suleyman Deveci, Birkan Eryigit, Senthil K. Kaliappan
The effect of eccentricity on the failure time of pipes under hydrostatic pressure test has a significant magnitude that it can easily mislead the evaluation of pipes according to requirement of ISO 4427-2. Therefore, authors propose a maximum relative eccentricity limit of 0.015, even lower, for pipes being tested...
Author(s) : Carlos Domínguez, Álvaro Pérez, Nuria Robledo, Cristina González, Beatriz Paredes, Rafael A. García-Muñoz
Last methodologies for fast evaluation of the SCG resistance on polyethylene pipe materials are analyzed in this work and compared with traditional PENT and FNCT tests. Strain Hardening (SH), Crack Round Bar (CRB) and Accelerated Creep Test (ACT) will be good alternatives for evaluating PE100RC resins. Moreover, SH...
Author(s) : Ilari Aho, Volker Meyer, Peter Sejersen
The lack of a cross-border acceptance of the approval of the hygienic requirements for plastic pipes systems is inefficient and expensive for the industry. The costs for testing of a pipe system range from a few thousand Euro to more than €30k /reference 3, 4/. The European Plastic Pipe and Fitting Association...
Author(s) : Pavel Hutar, Jan Poduska, Pavol Dlhy, Andreas Frank, Jaroslav Kucera, Jiri Sadilek, Gerald Pinter, Lubos Nahlik
This paper investigates possible use of recycled material as a part of a multilayer polyethylene pressure pipe system. Crack propagation in different configurations is simulated. Lifetimes of pipes containing recycled material are calculated. Results are compared with lifetimes of pipes made of virgin...
Members of the Association
