Papers
Plastic Pipes Conference Association # 2016 Berlin
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 achieved, at much lower cost. In this pipe two reinforcements are used: steel meshes embedded in pipe wall and steel strips vertical to pipe wall. In production, layers of composite profiles are spirally wound and welded together to form the pipe, while the profiles are prepared by means of composite extrusion. Both profile preparation and pipe forming are accomplished on one continuous production line. Traditional electrofusion technology is used for pipe jointing, but a pioneering jointing element is introduced, i.e. multilayer steel reinforced PE electrofusion belt.
The diameter range of the pipe is dn200～2600mm, PN varies from 6 to 12.5bar, and ring stiffness of all diameters are greater than 10KN/m2 . Commercial production for dn315-2200mm has started ever since 2013. Laboratory tests and engineering practices has verified that all design criteria are met.
The pipe boasts quite a few benefits in comparison with other kinds of composite PE pipes and solid wall PE pipe, e.g. great raw material savings, high ring stiffness, good structural and dimensional stability, greatly-increased production speed, quick and reliable pipe jointing and low overall project cost, etc. Main applications include medium and large diameter water transmission lines from water sources, water mains in cities and towns, pressure drainage and sewers, water conservancy irrigation, intake and discharge pipelines in seawater desalination projects, etc.
Related papers
Author(s) : Hua Ye, Sun Jin, Wei Ruoqi
As a safe, clean, low-carbon and reliable energy source, nuclear power, together with hydropower and coal power, constitutes the three pillars of the world's energy supply and play an important role in the world's energy structure.With the strong support of national policies, China's nuclear energy has entered a new...
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) : Mark Yu, Dongyu Fang, Peck Tze Kang, Amos Tay , Fan Liu
Large diameter pipe was introduced in refineries and petrochemical plant, desalination plant and power plant for water intake and sea out fall in the past decade. PE100-RC material was selectedfor its excellent balance of superior bi-modal stress crack resistance and consistent high stiffness modulus. Under the...
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) : Chen Jianchun, Liu Luliang
3S (Strengthen Single System) cyclone single stack system is a new product for building drainage, which has the advantages of saving materials, large drainage quantity, low drainage noise, etc. In this system, the guide structure, swirl angle, volume structureand the height of spiral reinforcement are optimized...
Author(s) : Ernest Lever, Yongming Liu, Yiming Deng
This collaborative program will provide an integrated set of quantitative tools that will provide a structured approach to reducing operational risk in vintage plastic distribution systems susceptible to Slow Crack Growth failures. A novel endoscopic structured light scanning tool will be developed and prototyped for...
Author(s) : Sun Jin, Hua Ye, Wei Ruo-qi
Nowadays large diameter HDPE pipes have been widely used in water supply, municipal gas, mines, nuclear service and other fields, while residual stress of large diameter thick-walled pipes in the extrusion processing have resulted in lots of engineering failure cases. In this paper residual stress and mechanical...
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) : Qu Yunchun, Sun Xuhui, Chen Guokang
The polyethylene resin whose relative molecular mass distribution shows bimodal (Bimodal PE) possesses not only favorable mechanical property, but also excellent processing property. Currently, Borstar Technology of Borealis Company—loop slurry reactor and gas fluidized bed reactor install in series, which is...
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) : Xu Yijiong, Liu lIangbing, Dongyu Fang, Cindy Wang, Jarmo Juhani Harjuntausta, Youssef Taha
Key words : Corrugated pipe, PP-HM, PE, sewage, drainage Whilst plastic pipes are already used in China for underground sewage and drainage applications the properties and processing limitations of the materials used are such that they are not able to fulfill all the requirements for large diameter or higher...
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) : 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) : Dongmei Zhe, Ruoqi Wei, Chang Liu, Ye Hua, Yu-e Li
The statistic data of the consumption of polyethylene pipe materials in China has been shown in this paper. The developing trend of polyethylene pipe materials in the following 5 to 10 years in China has been studied and the predicting data of the consumption of polyethylene pipe materials in China has been shown in...
Author(s) : 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...
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) : Sun, He, Zhang
Steel mesh reinforced plastic pipe is an innovative type of pressure pipe which is composed of plastics with a steel mesh encased. Due to the big differences in respective mechanical properties of the two materials, the stresses sustained by them also differ greatly when the pipe is subject to load. The methods...
Members of the Association
