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 : 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...
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...
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...