Studies to Theorize on the Minimum 100 Years Lifetime of the Polyethylene Piping System for Water Supply [PE]

# 2010 Vancouver

The Great Hanshin Earthquake that occurred on January 17, 1995, caused devastating damages to a large number of architectural structures such as high-rise apartment houses, and civil structures such as roads and bridges. This earthquake triggered the review of the quake-resistance standards of buildings and civil structures in Japan.
The damages on the part of lifelines were also tremendous. In particular, damages to the water supply pipelines were exposed, in terms of supply of not only potable water, water for medical services, but water for firefighting activities and many others.
On the other hand, no damage was witnessed with Polyethylene Conduits for gas transportation. In the water works as well, attention came to be focused on pipe materials having excellent earthquake-resistant quality. For water supply since then, our association has been active in developing the use of Polyethylene Pipes with PE100 as the main material (PE100, SDR 11, Blue color)

Based upon its conclusion that, in order to overcome so many issues surrounding the water works it was indispensable for all waterworks utilities to establish their management strategies and put them into systematic implementation, the Japanese Ministry of Health, Labour and Welfare publicized The Waterworks Vision in 2004, presenting the future image of our waterworks which should be the common target of the waterworks utilities as well as the specific measures and processes to bring them into realization. The Vision requires the waterworks utilities themselves to analyze and evaluate the present situations and future prospects to make up their future images and realization methods to aim at.
One of the measures indicated in the Waterworks Vision is to realize 100% earthquake resistance with the key pipelines. (In Japan, earthquake-resistant pipes are 1) ductile iron pipes equipped with earthquake-proof joint, 2) steel pipes with welded fittings and 3) Polyethylene Pipes for Water Supply equipped with heat-fusion fittings. ) With the government assistance in expenditures, Polyethylene Pipes for Water Supply have shown the biggest growth among the three competing pipes.

The coverage of the water supply system in Japan is shown in Fig. 1.1. It started to expand rapidly in 1960’s and exceeds 97% at present. Effective replacement will be required, as the pipelines installed then are now decrepit and demand for their r replacement is sure to increase. Replacement of decrepit pipelines is a major subject for the Japanese waterworks utilities to solve.

However, many of the Japanese waterworks utilities suffer from financial difficulties, which delays the replacement proceedings. At present the rate of pipe replacement is around 1% every year in Japan.

Polyethylene Pipes for Water Supply are designed by using MRS(minimum requiredstrength) at 20℃ and 50years.
In view of the fact that their longer lifetime is expected by many waterworks utilities in Japan. we, P0LITEC, have commenced our studies to theorize on the minimum 100 years lifetime of Polyethylene Piping Systems for Water Supply.

Please note that the whole article content is available on PPCA website onlySource : 2010 Vancouver


Related papers

Field test of Glass fiber reinforced polyethylene pipe system at soften ground

Author(s) : Mitsuaki TOKIYOSHI, Gentaro TAKAHARA, Joji HINOBAYASHI, Toshinori KAWABATA, Takashi KURIYAMA 2018 Las-Vegas

Glass fiber reinforced polyethylene pipes and fittings are controlled for bending characteristics (Strength and stiffness) for vertical and axial directions of pipe by spiral cross winding method. Generally, to use this method, it takes much stronger for vertical strength than axials cause of extruded direction,...

STUDY ON PARAMETERS AFFECTING DURABILITY OF POLYETHYLENE PIPES FOR HOT WATER APPLICATION

Author(s) : Hirofumi Kyutoku, Kazuhisa Igawa, Hidekazu Honma, Sakiko Fukunishi, Hiroyuki Nishimura 2018 Las-Vegas

There are mainly two grades of polyethylene pipes for hot water supply and heating. The excellent molecular structure polyethylene resins having resistance to stress crack growth are used because hot water is flowed for a long time in both polyethylene pipes. Furthermore, various additives are mixed to prevent the...

COMPARISON BETWEEN STRESS RUPTURE TEST AND HOT WATER CIRCULATION TEST CONSIDERING ACTUAL OPERATING CONDITION OF PE PIPES FOR HOT WATER APPLICATION

Author(s) : Takehiro Fujii, Kazuhisa Igawa, Hidekazu Honma, Kazushi Yamada, Hiroyuki Nishimura 2016 Berlin

The hydrostatic stress rupture test has been conventionally conducted as a good method of the lifetime evaluation. The hot water circulation test which is reflected to the actual operating condition is also useful method. The correlations and differences between the two tests were examined. Compared with the...

DEVELOPMENT OF THE RING FATIGUE TESTING METHOD FOR COMPOSITE PIPES

Author(s) : Yuji Higuchi, Rei Hyuga, Kazushi Yamada, Hiroyuki Nishimura 2016 Berlin

Recently, thermoplastic-based composite pipes have been developed in order to satisfy the higher requirements for gas and water distribution. Although the stress rupture test is now the major test method used to evaluate the long-term performance of these pipes, developing a new, convenient test method making it...

EVALUATION OF EARTHQUAKE DAMAGE OF PVC PIPES FOR WATER DISTRIBUTION IN JAPAN

Author(s) : Yuichiro Goto, Hiroyuki Nishimura 2016 Berlin

The damage of PVC pipes caused by the great earthquakes was investigated in Japan by various organizations including public and private institutions. As a result of these investigations it is found that high-impact modified PVC pipes with the long insertion length have the least failures. Moreover it is also reported...

LATEST TECHNOLOGY OF SADDLE SCRAPER FOR POLYETHYLENE PIPE

Author(s) : Takehiro Fujii, Hideo Hirabayashi, Kazushi Yamada, Hiroyuki Nishimura 2016 Berlin

It is important to stabilize the scraped surface of the polyethylene pipe, even if some operator scrape the surface of the polyethylene pipe. In Japan this automatic saddle scraper is widely used for improving workability and plumbing quality The newly developed “Automatic saddle scraper” consists of the casing...

LONG-TERM BEHAVIOR OF GLASS FIBER REINFORCED POLYETHYLENE

Author(s) : Mitsuaki Tokiyoshi, Philippe Vanspeybroeck, Kensei Inoue, Stephan Fullgrabe, Takashi Kuriyama, Toshinori Kawabata, Joji Hinobayashi 2016 Berlin

Big diameter polyethylene pipes used an important role due to superior performance (Flexibility, light weight, long lifetime and tighten joint) for water and industrial supply to several countries. However according to standard concerned Polyethylene pipes as like ISO4427 we are being used solid wall pipe with too...

Countermeasures against Deterioration in Non-Cross-Linked Polyethylene Pipes

Author(s) : Kazuhisa Igawa, Yuji Higuchi, Daisuke Tanemura, Kazushi Yamada, Hiroyuki Nishimura, Sakiko Fukunishi, Kazufumi Kohno, Hidekazu Honma, Hidekazu Sugimori 2014 Chicago

Recently, as awareness about energy-saving is increasing, high-efficiency energy systems have been developed and introduced. In addition, public and private sectors have simultaneously been implementing various efforts aiming to improve their prevalence rates. These initiatives are represented by the Cogeneration Gas...

Development of the Ring Creep Test Method for Composite Pipes

Author(s) : Yuji Higuchi, Tomohiro Tanishita, Kazushi Yamada, Hiroyuki Nishimura 2014 Chicago

Recently, PE resin-back composite pipes have been developed in order to satisfy the higher requirements for gas and water distribution. Although the stress rupture test is now the major test method used to evaluate the long-term performance of these pipes, developing a new, convenient test method making it possible to...

Evaluation of Plastic Pipes by Hot Water Circulation, Stress Rupture, and Immersion Tests

Author(s) : Kazuhisa Igawa, Yuji Higuchi, Akio Kamatani, Kazushi Yamada, Hiroyuki Nishimura 2014 Chicago

The polymer electrolyte fuel cells (PEFC) cogeneration system has been commercialized in Japan. The number of commercialized PEFC residential cogeneration systems have reached 100, 000 in total at the end of last year. The waste heat can be used for hot water supply and central heating. Hot water distribution pipes...

Members of the Association

BOREALISBOROUGEINEOS O&PIRPCKorea Petrochemical IND. Co., LTDLyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
TOP