Rehabilitation # 2001 Munich
This paper considers the collapse of liners confined within rigid pipes and recommends design equations top avoid this effect. Two and three-dimensional aspects of the problem are examined. The onset of unstable collapse is well-described by the critical pressure predicted from analytical models and is essentially an elastic phenomenon.
Author(s) : Fengliang Jiang, Nian Wu
This article discusses the development of the technique in producing large-diameter, medium-and-lowpressure water-delivery pipes. The continuous fiber-reinforced thermoplastic tapes perfectlyimpregnated with thermoplastic resin are wound layer by layer to form three-layer fibre reinforced polyethylene(PE) composite...
Author(s) : Xiaoying Lu, Yujie Wang, Qiang Huang, Chunyan Xu, Guangyu Zhu, Aimin Xiang, Linmei Wu, Yanfang Wang
The determination method of metal elements for polyethylene pipes was reported in this paper, the difference in metal elements content between raw materials and recycled materials was analyzed. The results showed that raw and recycled materials in polyethylene pipes were effectively distinguished via metal element...
Author(s) : Wang Liqun, Wu Gengtian, Qi Jun
In China demand is growing rapidly for large diameter plastic pipes due to urbanization and the need to protect the environment with improved storm-water management systems. Whilst plastic pipes are already used in China for underground sewage and drainage applications the properties and processing limitations of the...
Author(s) : Li Yu-e, Wu Zhijun, Hua Ye, Sun Jiawen
As the polyethylene pipes widely used in the gas fields, their long-term life is demanded more and more strict. The technical requirement about carbon black particle size was defined in the revised ISO 4437 :2007 as one of requirements of material. We can see that carbon black particle size of the compound is an...
Author(s) : Gibson, Frost, Stratfold
This paper discusses the possibilities offered by ramp pressure loading tests to generate data for determining the long term load-bearing characteristics of plastics pipe systems. In addition to ramp pressure loading, procedures are also considered where the pressure is held at a constant value for a period of time,...
Author(s) : Jivraj, Sehanobish, Dun, Damen, Wu, Zhou, Chen, Shulkin, Chudnovsky
Analysis of polyethylene (PE) pipes ductile failure (ballooning) suggests that it is directly related to the delayed necking phenomena and time to ductile failure of PE pipe can be evaluated as the time to delayed necking. The necking in polyethylene (PE) is studied under displacement control (ramp test) and load...
Author(s) : Frost, Gibson
This paper describes the activities of the Joint Industry Project on Implementation of Reinforced Thermoplastic Pipe in the Oil and Gas Industries. The aim of the JIP is to promote applications of this new class of product in the transport of oilfield fluids, in gas transmission and in subsea flowlines.
Author(s) : Gibson
This paper discusses the fabrication and properties of continuous fibre reinforced thermoplastic pipe systems. Such products can be manufactured by various winding processes involving reinforcing fibres or prepreg tape and have the potential to form the basis of a new range of high added value pipe products.
