Introducing PP-HM Materials for Twin Wall Corrugated Pipes in China

Author(s) : Wang Zhanjie

As the largest production country, with numerous applications, China’s plastic pipe industry is developing steadily to meet the demand and needs. This paper analyzes the current situation and barriers, and proposes the breakthroughs to achieve a sustainable, stable and healthy development of China’s plastic pipe...

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) : Baiqian Li, Jun Wang, Lixian Zheng, Xiaoyi Peng, Lei Wang, Yu Cui, Guozhi Xu

Polyethylene/Aluminum/Polyethylene (PAP) composite pipe has the advantages of corrosion resistance, limited joints and convenient installation. Nowadays PAP pipes are widely used in indoor gas conveyance. But a number of companies encounter difficulties in installing gas meter in users’ house as well as billing. Some...

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) : 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) : Alex Stolarz, Jian Wang

THE PE-RT TECHNOLOGY HAS EVOLVED SINCE IT HAS FIRST BEEN INVENTED 1982. AN ESTABLISHED TECHNOLOGY FOR HOT AND COLD SANITARY PIPES HAS POSITIONED ITSELF WELL WITHIN OTHER MATERIALS DUE TO THE EASY PROCESSING, HANDLING AND COST EFFICIENT PRODUCTION OF PIPES. RECENT TECHNOLOGY ALLOWS EVEN MORE FLEXIBLE RESINS TO BE...

Author(s) : Fu Zhimin, He Guoshan, Wang Wanjuan

Our research shows that in a torque rheometer test the greater the fusion degree of PVC-U is, the higher the minimum torque of the torque curve is, and the smaller the difference between the maximum torque and the minimum torque of the torque curve. According to the relationship, the method of evaluating the fusion...

Author(s) : Suleyman Deveci, Dongyu Fang

Latest developments in polyethylene production (hexene co-monomer and bi-modality) have increased the material’s Slow Crack Growth (SCG) properties, which is a time dependent brittle type failure under low stress levels and one of the most important long term properties of pipe grade polyethylene materials. Despite...

Author(s) : Antti Tynys, Dongyu Fang, Prashant Nikhade, Mark Yu, Tomi Kangas

The need for larger diameter pipes and fittings for in-house heating, plumbing and domestic water systems is pushing the existing materials and processes to their limits. More often final products cannot be produced without penalties either in production rate or in final product quality. This paper discusses...

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) : ZhanJie Wang, Cindy Wang

With the offers of whole value chain people, the application of PE pressure pipes has been increased widely in China since 1990’s, especially for gas pipes. Compounding PE material ensures the qualified pipes being used for infrastructure projects. There are some Innovation products from pipe producers to enlarge 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) : Tu Xiang-qun, Wang Chao, Cheng Zhong-lin, Dong Bo-bo

This paper is to verify the impact of different contents of nucleating agent and annealing processes on the content of β-crystal. By using four-parameter equation of PP-RCT with requirements in different application conditions, different temperature coefficients and Miner's rules the design stress of PP-RCT materials...

Author(s) : Tu Xiangqun, Wang Chao

Two kinds of comprehensions about the wall thickness of socket fusion fittings from GB/T 28799.3- 2012 have been analyzed in this paper. Socket wall thickness relative to the different value of pipe series of fusion fittings was calculated respectively, and two kinds of simplified calculation have been suggested. The...

Author(s) : KumHoong Lou, Farraj Tashman, Dongyu Fang, Faisal Mohamed Khouri

“Greening the Desert” was the vision of the founding President of the United Arab Emirates, His Highness the late Sheikh Zayed bin Sultan Al Nahyan. Today this vision is a reality because Abu Dhabi has planted 14 million trees in 250,000 hectares of forest, which are irrigated from 5,651 wells by a network of 55,000...

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) : Xiao Lei, Cheng Liang, Fang Dongyu

The renovation of old water pipes in a big city, such as Shanghai in China, is always a challenging job due to huge population, heavy traffic and high demand for drinking water. Due to these problems No-Dig technology has become common practice, particularly relining using plastic pipes, to repair corroded metallic or...

Author(s) : Tang Guoqiang, Wang Wei

This paper briefly introduces the characteristics of steel wire reinforced thermoplastics (PE) composite pipe structure, domestic and foreign sea crossing pipeline laying method, methods and their advantages and disadvantages, welding installation of steel wire reinforced thermoplastics (PE) composite pipe laying...

Author(s) : Wang Zhanjie, Zhao Yan, Melody Guo

In recent years, the Chinese plastic pipe industry has maintained a high growth rate and in 2012 the production of plastic pipe in China amounted to over 11 million tons. This not only provides important benefits due to the outstanding performance of plastic pipe, such as corrosion resistance, smooth wall, easy...