The Test Method of Carbon Black Particle Diameter for PE pipes applying for gas

Author(s) : Liang Yu, Akshay Ponda, Dane Chang

Following the development of US shale oil and gas production since 2007, the demand for thermoplastic pipes with better corrosion resistance, and lower installation and operation cost than carbon steel pipe, has been growing significantly. Nylon 12 has been qualified for hydrocarbon transportation in offshore flexible...

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) : HU Fa, LI Yue, GAO Yuanjie, ZHE Dongmei, WEI Ruoqi

This paper expounds the development status of composite insulating pipe in the heating and chemical fields from the aspects of materials, structure and application. Combined with the relevant standards and technical requirements, the performance advantages and the key evaluation methods such as axial shear strength,...

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) : Cheng Zhi, Mingyuan Hu, Kaige Duan, Chaoxi Zhou, Dongming Yu

The PE properties are obviously improved by crosslinking modified to TPEX, which can approach to that of PEX, while still remaining thermoplastic. It can be processed by the common forming method of thermoplastic; the products can be hot-melted and the scrap can be processed to be reused. The two-layer structure...

Author(s) : Mingyuan Hu, Dongming Yu, Zhangcheng Chen, Cheng Zhi, Kaige Duan

Studying in barrier property of TLCP/PO alloy and EVOH/PO alloy. Filtrating formulas with extruding alloy into pipes. Trying to coat alloy on pipes and co-extrude into two-layer oxygen barrier plastic pipe. The traditional Ethylene vinyl alcohol copolymer (EVOH) barrier plastic pipe used in internal closed-loop...

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) : Aimin Xiang, Jianling Xie, Yuanzhang Yu, Yufeng Ren

PE-UHMW pipes standard and application in China are introduced. In this study, the tensile properties, charpy impact strength and abrasion characteristics of PE-UHMW pipes were investigated. These results demonstrate the excellent properties of PEUHMW pipes. A novel method of testing melt flow rate was also...

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) : 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) : 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) : Nan Li

The properties of adhesive-coated steel tapes in metal reinforced polyethylene spiral corrugated pipe (MRPSCP) are very important for the properties of MRPSCP. In the present research, we take 3 years to develop a new technology to fabricate BZ-SH99 adhesive-coated steel tapes, which have better properties than those...

Author(s) : Li Yanjun

This article describes the general construction and different types of drainage system, including cast iron pipes and plastic pipes, plastic pipe commonly used are: hard PVC pipe (PVC-U), high density polyethylene pipe (PE-HD), polypropylene tube (PP), engineering plastics acrylonitrile - butadiene - styrene (ABS) and...

Author(s) : Li Xianmei, Fu Zhimin

Despite the increased activity over the last few years, sewage collection and treatment are still a critical problem in rural China which leads to further pollution of water sources and other environmental concerns. This creates a major market opportunity for cost effective plastic non pressure sewage and drainage...

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) : Dongming yu, Linan Chen

This article is the impact study on general plastic pipe performance when using Liquid Crystal Polymer (hereinafter LCP) and LCP alloy, the soaking extrusion in-situ composite technique and the coat-molding technique for plastic pipe extrusion. It turns out that the high barrier property of TLCP can help us...

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 Xing

Large Caliber Steel Wire Reinforced Polyethylene pipe is composited from profiled wall HDPE with middle layer steel wire reinforcement, current diameter ranges from 400mm to 3000mm. The pipe combines the high rigidity of the steel wire ,the elasticity and good corrosion resistance of the PE resin, as well as the...