PPCA papers

In this section, you will find a database of all articles presented and published by PPCA in biannual conferences organized by PPCA since 1970.
You have access to a generic search, or to an advanced search, by preset keywords.


EFFECT OF THE RESIDUAL STRESSES ON THE SLOW CRACK GROWTH

Author(s) : Pavel Hutař, Martin Ševčík, Jaroslav Kučera, Michal Zouhar, Robin Luky, Luboš Náhlík 2012 Barcelona

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...

ENHANCEMENT OF BUTT FUSION JOINTS INTEGRETY AGAINST SLOW CRACK GROWTH

Author(s) : Juseok OHa, Youngjin Ohb, Seunggun Leeb, Jongsung Kimc, and Sunwoong Choia 2012 Barcelona

Butt fusion welding is a method of joining often practiced in structural plastic pipes used in pressure applications, where joint integrity is a strict requirement for design lifetime of fifty or more years. The fusion process encompasses melt flow and rheology as well as diffusion and solidification sciences in which...

ESTIMATION CONCERNING THE DAMAGE TOLERANCE OF PLASTIC PIPES BY THIRD PARTIES

Author(s) : Yuji Higuchi, Masaaki Ishikawa, Toshiaki Furuno, Eiji Okamura, Masahiro Mutoh, Hiroyuki Nishimura, Asami Nakai, Hiroyuki Hamada 2012 Barcelona

Pipe materials that are resistant to damage by thirty-party works were investigated with attention to materials already used for other purposes. Pipes for underwater cables, water service and agricultural use, both multiple-layer and single-layer types, were selected for the test. Protective materials were also...

ESTIMATION OF SURFACE VOID INITIATION OF POLYETHYLENE PIPES IMMERSED IN CHLORINATED WATER

Author(s) : Hiroyuki Kurio, Yuuji Yamamoto, Kenji Mizukawa, Takayoshi Yarimizu, Kentarou Nakata, Satoshi Saitou, Hisao Hirota and Takashi Kuriyama 2012 Barcelona

In this paper, an acceleration test has been done to evaluate of the resistance of polyethylene pipes to the chlorinated water with varying the concentration of chlorine and test temperature. The surface defects like a void due to the delamination of film about 10-micron meter thickness were observed after the...

EVALUATION OF MATERIAL SAFETY FOR PLASTIC PIPE IN NORHT AMERICA IMPACTS OF NSF/ANSI STANARD 61

Author(s) : Nasrin Kashefi 2012 Barcelona

NSF/ANSI Standard 61 (NSF 61) Drinking Water System Components-Health Effects was established in 1988 to address concerns related to chemical contaminants added to drinking water from drinking water system components. This standard was developed at the request of the U.S. Environmental Protection Agency to establish...

FAST SMALL SCALE METHOD TO PREDICT MATERIALS RESISTANCE TO RAPID CRACK PROPAGATION

Author(s) : Tanja Piel, Erich Zinoecker, Franz Mitter and Sybille Simon 2012 Barcelona

The resistance of polyethylene (PE) pipes to rapid crack propagation (RCP) is normally tested using the small-scale steady-state test (S4). Even though the S4 test is a small scale test compared to the full scale test, it still requires a lot of material for pipe extrusion and the testing takes rather long time. There...

From double loop to double loop: PE100-RC, the perfect fit for geothermal probes

Author(s) : Libert Daniel 2012 Barcelona

Heating and/or air conditioning systems based on ground heat pumps are increasingly popular in European countries, their growth fuelled by both private and public investments in sustainable energy sources. These systems typically circulate water inside boreholes, effectively using the ground as a constant temperature...

Global PVC Stabiliser Trends for Pipes – Challenges and Practical Experience

Author(s) : Dr. Udo Anders 2012 Barcelona

PVC is a well-established material, globally utilised, in many different applications, such as window profiles, technical profiles, cables and sheets. In Pipes, PVC is used in pressurised potable water applications, as well as sewerage systems, gas piping systems, gutters and fittings. A Global analysis of PVC...

HARMONISATION OF POLYETHYLENE PIPE BUTTFUSION PROCEDURES AND TEST METHODS – FINAL CONCLUSIONS

Author(s) : Stephen Beech, Christophe Salles, Ulrich Schulte 2012 Barcelona

Polyethlyene, Pipes, Buttfusion, Joining, Testing Several well established procedures are used for butt fusion welding of PE pipes globally. The most widely used are the European Single Pressure, UK Dual Pressure, and the USA High Pressure procedures. In the future it may be possible to rationalise these procedures....

Heavy metal free yellow colour for gas pipes

Author(s) : roger Reinicker 2012 Barcelona

PE pipe was first adopted for use by the gas utilities in the USA in the early 1960’s. Today PE is the dominant transportation mode for low pressure (< 125 psi) gas distribution for residential and light industrial users supplying an estimated 95 percent of the service provided. High visibility heavy metal based...



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