2018 Las-Vegas : Field test of Glass fiber reinforced polyethylene pipe system at soften ground
Author(s) : Mitsuaki TOKIYOSHI, Gentaro TAKAHARA, Joji HINOBAYASHI, Toshinori KAWABATA, Takashi KURIYAMA
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,...
2016 Berlin : Development of the ring fatigue testing method for composite pipes
Author(s) : Yuji Higuchi, Rei Hyuga, Kazushi Yamada, Hiroyuki Nishimura
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...
2016 Berlin : Evaluation of earthquake damage of PVC pipes for water distribution in japan
Author(s) : Yuichiro Goto, Hiroyuki Nishimura
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...
2016 Berlin : Latest technology of saddle scraper for polyethylene pipe
Author(s) : Takehiro Fujii, Hideo Hirabayashi, Kazushi Yamada, Hiroyuki Nishimura
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 unit...
2016 Berlin : Long-term behavior of glass fiber reinforced polyethylene
Author(s) : Mitsuaki Tokiyoshi, Philippe Vanspeybroeck, Kensei Inoue, Stephan Fullgrabe, Takashi Kuriyama, Toshinori Kawabata, Joji Hinobayashi
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...
2014 Chicago : 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
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...
2014 Chicago : Development of the Ring Creep Test Method for Composite Pipes
Author(s) : Yuji Higuchi, Tomohiro Tanishita, Kazushi Yamada, Hiroyuki Nishimura
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...
2012 Barcelona : 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
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...
2012 Barcelona : 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
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...
2012 Barcelona : Protective Sheeting For Polyethylene Pipe
Author(s) : Tanaka Hiroaki
Polyethylene (PE) pipes for gas supply, which have been widely used in recent years,
have superiority in installability, seismic performance and corrosion resistance, while
their resistivity against external force such as from strikes by excavator bucket edges
is inferior to metal pipes. Under some installation...
2010 Vancouver : Pultrusion Technique for Braided Fabric Reinforced Thermoplastic Composite Tube
Author(s) : Asami Nakai, Yoshitaka Tanaka, Akio Ohtani, Shigeyoshi Matsubara, Louis Laberge Lebel, Hiroyuki Hamada
Pultrusion process is one of the composite production methods that have been
used for mass production of uniform profiles. However, there are two problems
that are commonly found in pultrusion products; one of which is its anisotropic
mechanical properties. This anisotropicity stems from the alignment...
2010 Vancouver : Reliability of PVC-U Three Layer Pipes with Recycled Solid Core
Author(s) : Takashi KURIYAMA and Norio HIMUKAI
In order to make clear the reliability of PVC-U recycled pipes in relation to the three-layer
structure, we described the deformation and fracture mechanism of wall of pipes based on
non-destructive techniques of scanning acoustic microscopy (SAM). The results showed that
the multiple necking deformation occurred...
2006 Washington DC : Development of the Innovative Technology for Aged House Pipes
Author(s) : Akiyama, Higuchi, Nose, Toyoda, Kitano, Kuriyama
Since the year 2001, the Japan Gas Association has started the development of new renewal
methods capable of cost reduction for modification work by inserting a new double-layered
corrugated plastic pipe into the old gas pipe to encourage the modification of aged house pipes
and upgrade the level of safety. The...
1998 Gothenburg : Effects of processing conditions on the fracture toughness
Author(s) : Kuriyama, Narisawa, Shiina, Kotaki
Unplasticized polyvinylchloride (PVC-U) is extensively used in the pressure pipe applications. These pipes are usually designed to have 50 year lifetime. Although their service performance is generally very satisfactory , there has been a number of cases where the pipes fail at unexpectedly short times. One of the...