Case study 4 Practical experience with sewer pipes

Case Studies, Discussion & Buyer's Guide # 1972 Southampton

In the Nordic countries common research work concerning buried sewer plastics pipes has been followed by an independent evaluation group led by the authors. This group was founded in 1968 by the Nordic plastic industries in order to create a forum for independent evaluation of all the various research programmes so as to achieve a basis for common standard specifications.

The evaluation group, which consists of two representatives from each of Denmark, Finland, Norway and Sweden, had its first seminar in December 1968. As far back as that occasion the theory of ~olin'?, concerning the behaviour of thin-walled flexible pipes buried in the ground, was accepted as a basis for a standard proposal. Since then three additional seminars have been held, the last of which, in Stockholm in May 1972, was also the final one. Reports are available from all seminars. A summarising interim report in English was presented at an IS0 meeting in Frankfurt in April 19703, and a verbal report was also given by Molin at the first Southampton Symposium in 1970 ...

Please note that the whole article content is available on PPCA website onlySource : 1972 Southampton


Related papers

Copolymerized Silane PEX Technology - A New Innovation for Producing PEX Pipes

Author(s) : Hojer, Janson, Oderkerk, Venator 2006 Washington DC

For nearly three decades two technology processes have been available for production of PEX piping by moisture induced silane crosslinking (PEX-b). The first technology, the Sioplas™ process, was invented and patented by Dow Corning. This process requires extruding pipe from a reactive compound composed of silane...

Flexible, Pre-Insulated Polymer District Heating Pipes

Author(s) : Bassewitz, Janson, Liebel 2006 Washington DC

From Jan 6th 2001 until March 31st 2005 a research project, funded by the German Ministry for Economy and Research had been carried out in order to investigate technical details not yet researched. The results of the project have shown that polymer flexible pipes for district heating are fit for purpose.The research...

Combined Loading of Buried Thermoplastics Pressure Pipes

Author(s) : Janson, Alferink, Wolters 2004 Milan

This paper presents the results of work that was performed at the request of TEPPFA , The European Plastics Pipes and Fittings Association, on the issue of “Combined loading” (external and internal loading) of buried thermoplastics pressure pipes. The work is of great importance for users and designers of...

Strength Investigation of Large Diameter PE 100 Low Sag Pipe

Author(s) : Janson, Bergstroem, Baeckman, Blomster 2004 Milan

When performing strength quality control of PE pressure pipes made of new grades it is important to take the creep vs. time into consideration and not only the common stress vs.time behaviour. Thus, it is just the relation between linear strain and logarithmic time, which will within a reasonable testing time help us...

Design & Testing for Obtaining Sustainable Products

Author(s) : Janson 1998 Gothenburg

Sustainable Development’ is a concept which is often used today, particularly when discussing necessary efforts for preventing persistent environmental problems. It came up as a result of the findings already by the Rome Club et al in the early 70s’, implying that the natural resources of the earth are limited and...

Design of Thermoplastics Pipes

Author(s) : Alferink, Janson, Olliff 1998 Gothenburg

Extensive field trials are being performed in a project sponsored by TEPPFA and APME,to obtain well documented information about the behaviour of buried thermoplastics pipes. as outlined in the paper by Alferink, Bjorklund and Kallioinen (Ref 1). This information is of vital importance to obtain a workable design...

Long-term behaviour of buried PVC sewer pipes

Author(s) : Janson 1995 Edinburgh

At the International Conference on Plastics Pipes W in Bath 1988, a paper was presented by the Author called : "Physical ageing of buried PVC sewer pipes as affecting their long-term behaviour". The tests performed on constantly deflected pipes referred to at that time had been running for approximately one year....

Methods for Tightness Testing of Plastics Pressure Pipelines

Author(s) : Janson 1992 Eindhoven

New research and development particularly concerning the long-term strain of modern PE resins have created a basis for a simple and adequate method for tightness testing of plastics pressure pipelines. Thus, it is shown that for plastics pipes subjected to constant internal hydraulic pressure, it is quite possible to...

The Actual Performance of Plastics Pipes in Europe over 25 Years

Author(s) : Elzink, Molin 1992 Eindhoven

Today, in some parts of Europe plastics pipes and fittings are considered as mature products which have obtained an established position in underground applications. However, in others due to their flexible nature, their use is still sometimes questioned. This paper describes the actual performance of plastics pipes...

Physical Ageing of Buried PVC Sewer Pipes as Affecting their Long Term Behaviour

Author(s) : Janson 1988 Bath

The investigation has indicated that deflected uPVC pipes are subjected to a physical aging process, which gives rise to a lower rate of decrease in the E-modulus than has previously been assumed. Based upon these findings the long term ring stiffness of PVC sewer pipes is determined. Concerning the bending strength...

Recent Developments in the Design of Underground Plastics Pipes

Author(s) : Molin 1988 Bath

Members of the Association

BOREALISBOROUGEINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
TOP