Gas & Water
Plastic Pipes Conference Association # 2006 Washington DC
Chung, Oliphant, Vibien, Zhang
Disinfectants are commonly added to potable water to control bacteria, viruses, protozoa, algae and fungi which can potentially lead to waterborne diseases. The three most common disinfectants used for maintaining a disinfectant residual in North America are chlorine, chloramines and chlorine dioxide. While these disinfectants are all oxidants, their unique characteristics can result in a significantly different impact on the performance of different plumbing system components. In this paper, the chemistry and characteristics of the different oxidants is discussed in the context of oxidative degradation of plumbing system components.
Related papers
Author(s) : Tom Stewart, Richard Hicks, Patrick Vibien, Lance MacNevin
Arguably, broadband technologies have become as vital to society as water delivery, waste removal and energy distribution. However, the role of plastic conduit in broadband is often overlooked within the piping industry and society in general. HDPE conduit is an essential component to the build -out of 5G cell...
Author(s) : Yilaing He, Tianjun Zhang
A new electrofusion PE belt is developed by reinforcing it with various layers of steel mesh. It’s of sandwich structure, consisting of steel mesh reinforcement, heating wire and polyethylene. One or more layers of steel mesh is encapsulated in the middle, and heating wire is embedded onto “inner side” of the belt....
Author(s) : Dongyu Fang, Mark Yu, Zhang Qingfu
In the present paper we introduced how high modulus polypropylene helps an innovative design of utility tunnel up to 4000mm in diameter. High modulus polypropylene shows high modulus but still maintain reasonable flexibility so that tunnel and surrounding soil could form an integrated system, which means no force is...
Author(s) : Zhang Wei, Wei Ruoqi, Zhou Minghong, Zhou Mingwei,
This article gives a brief introduction of plastic inspection chambers in China. It focuses on the formulation of China's national standard for plastic inspection chambers and conducts the theoretical analysis and data validation of the key technical metrics in the standard for the following three tests: the...
Author(s) : Sun Qingjun, Liu Tongxi and Zhang Tianjun
A new composite PE pipe for pressure applications has been developed which combines the following features: polyethylene based, of structural wall, of multiple layers and steel reinforced. Another outstanding feature of this product is that large diameters up to dn2200-2600mm can be made and higher ring stiffness is...
Author(s) : Zhang Wei, Wei Ruoqi, Zhou Minghong, Zhou Mingwei,
This article gives a brief introduction of plastic inspection chambers underground test, analyzes the stress borne by plastic inspection chambers from different angles combined with pressure sensors and strain gauges, sorts out some of the underground test data and analyzes the test data, and finally sums up the...
Author(s) : Dr. Ken Oliphant, William Luff, Dr. Peter Angelo, Patrick Vibien
Managing aging pipeline infrastructure is an important part of overall pipeline risk management. The critical risk management questions for an aging infrastructure are: how quickly should replacement occur and what parts of the system should be prioritized for replacement. To answer these questions it is necessary to...
Author(s) : Dr. Ken Oliphant, Patrick Vibien, Dr. Michael Conrad, Sarah Chung
A new methodology has been developed to validate the performance of polyethylene piping materials in potable water applications. The methodology is based on several research programs which examined a standardized accelerated test methodology (ASTM F2263 Standard Test Method for Evaluating the Oxidative Resistance of...
Author(s) : Dr. Ken Oliphant, Patrick Vibien
New and formal approaches to Asset Management (AM), such as the PAS-55 and ISO 55000 Asset Management standards have been developed over the past decade. These AM standards can be applied to pipelines and cover all stages of a pipeline's lifecycle - acquisition, operation, maintenance and renewal/disposal and provide...
Author(s) : Zhang Wei, Wei Ruoqi, Zhou Minghong, Zhou Mingwei, Lin Baoshu, Xiao Lingli
The plastic inspection chamber is one of the rapidly developing products in the field of drainage in China for the past few years. At present, plastic inspection chamber is mainly made of PP, PE, PVC and so on. The manufacturing technologies include injection molding, rotational molding, mechanical assembly and...
Author(s) : Zhang SiLiang, Zhang ShuangQuan, Guo XiaoLing, Ren YunHong, Wang MingKe
This article describes the effect of additive, light and high temperature on PE-X pipe’s performance. By additive amount changes, will be have different influence to pipe’s brittleness resistance, bending strength, and aging resistance. As cross-linking agent’s content increasing, bending strength enhanced, but...
Author(s) : Zhang Zhihao, Zheng Xiaoming
PE pipes have been used for many years in China. However, due to lack for engineering experience, some failure or leakages caused by PE pipe axial shrinkage have occurred in practice. In particular leaks were observed at or near the joints between metal and PE pipes. Suspecting that the cause of the leakage was the...
Author(s) : Zhang Li
Bases on the technical features of high-pressure glass fiber reinforced plastic pipes, steel frame PE complex pipes and flexible composite pipes, together with the application status of the above said pipes in oil field and related technical progress, this article will illustrate the existed questions, as well as our...
Author(s) : K.Oliphant
Polyethylene (PE) piping materials have been used in potable water applications for more than 50 years with considerable success and have enjoyed a consistently high satisfaction rating from Water Utilities. Since the introduction of these first materials, material performance has evolved significantly. To demonstrate...
Author(s) : S. Chung, M. Conrad, S. Lee, K. Oliphant, M. Wang
ASTM F2023 and ASTM F2263 have been used to evaluate the oxidative resistance of plastic piping materials to potable water. As a potential method to accelerate this testing, the use of internally notched pipe has been investigated and preliminary research has shown that the method appears to be able to generate the...
Author(s) : Chung, Li, Oliphant, Vibien, Rozental-Evesque, Rabaud
Plastic piping materials confer many advantages for applications in Potable Water transportation. Considerable research has been conducted to develop methodologies for ensuring performance in these applications for service lifetimes that target an excess of 100 years. A key component of these accelerated methodologies...
Author(s) : Hsuan, Zhang, Wong
The 100-year stress crack resistance (SCR) of corrugated HDPE pipes was evaluated using a 600 mm diameter pipe. The SCR tests were performed on the finished pipe at the liner and junction locations. The notched constant ligament stress (NCLS) test (ASTM 2163) was used for the pipe liner assessment. For the pipe...
Author(s) : Kosari, Oliphant, Vibien,
The Small Scale Steady State (S4) Rapid Crack Propagation (RCP) test methodology has proven to be an effective tool in assessing resistance to rapid crack propagation. At the same time, an evolution in polyethylene material performance has occurred that has produced materials with increasingly higher resistance to...
Author(s) : Lever, Palermo, Wright, Oliphant
The piping industry has a need for a well-founded methodology to predict lifetime of pipeline components subject to stress concentration. Another useful tool would be a method to assess the impact of manufacturing processes on the slow crack growth (SCG) properties of a resin that can be used for process control in a...
Author(s) : Palermo, Vibien, Oliphant, Kosari
The corrugated HDPE pipe industry is considering the responsible use of recycled materials in their pipe production and also in their pipe standards. One of the key requirements for successful use of recycled materials is ensuring performance of the resulting HDPE corrugated pipe. As slow crack growth (SCG) has been...