2018 Las-Vegas : Preparation and studying of thermoplastic cross-linked polyethylene
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...
2016 Berlin : Underground engineering stress analysis of plastic inspection chambers
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...
2014 Chicago : Essential Variables of Heat Fusion Joining of Polyethylene Pipe
Author(s) : Dr. Z. Jimmy Zhou, Jim Johnston
Heat fusion joining method has been widely used for thermoplastic piping materials such as polyethylene to form the “one-material” pipeline system. No additional 3rd party materials such as an adhesive are needed. The fusion procedures to ensure the quality of the joints could be different for different materials and...
2014 Chicago : Study on Structural Integrity of Plastic Inspection Chambers
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...
2012 Barcelona : Ligament Stress Regression of Notched PE100/PE4710 Pipe
Author(s) : Z. Jimmy Zhou
(Keywords : Polyethylene pipe, ligament stress, regression, notch depth, lifetime.)
Hydrostatic test was conducted on notched PE100/PE4710 black pipe specimens at
various temperatures and stresses. Hoop stresses were normalized to ligament
stresses by taking into consideration of the effect of wall thickness reduction...
2012 Barcelona : The application of plastic inspection chamber for drainage in China
Author(s) : Zhou Minhong
As the key component of underground piping network for drainage, plastic inspection
chambers have many major advantages and are also being applied more and more
widely instead of traditional brick-built ones. Users become familiar with this new
technique gradually. However there are two major problems which have...
2008 Budapest : The next gas Fronteer
Author(s) : Zhou Minhong
The advanced bimodal PE4710 materials enable its applications in large diameter gas pipe to
replace cast iron and steel pipe. Among the three key field performances, the pressure rating is
independent of pipe diameters. However, the SCG and RCP properties are dependent of pipe
diameters. As pipe diameters increases,...
2006 Washington DC : Largest PE100 Project in North America
Author(s) : Chang, Zhou, Michie
MTD Pipeline LLC is a joint venture between Martin Marietta Magnesia Specialties LLC
and The Dow Chemical Company. A nearly 30 miles of high density polyethylene
(HDPE) pipeline project in northern Michigan is serving as the latest example of
technology evolution for polyethylene (PE) pipe used in underground pipe...
2006 Washington DC : Performance of Scratched HDPE Pressure Pipe
Author(s) : Zhou, Chang
High density polyethylene (HDPE) pressure pipe may be scratched during installation. The scratches reduce the wall thickness and therefore increase the dimension ratio (SDR pipe). 1” SDR 11 pipe samples extruded from bimodal PE100/PE4710 and unimodal PE80/PE3408 pipe materials were used to investigate the effect of...
2004 Milan : Can ISO MRS and ASTM HDB Rated Materials be Harmonized
Author(s) : Zhou, Palermo
ISO MRS and ASTM HDB rating systems have been successfully used for more than four
decades in Europe and North America. MRS differentiates well the three generations of
HDPE materials by classifying them as PE63, PE80 and PE100. However, HDB classifies all
three generations of HDPE as only one PE 3408. When...
2001 Munich : Assessing Material Performance in Chlorinated Potable Water Applications
Author(s) : Vibien, Couch, Oliphant, Zhou, Zhang, Chudnovsky
The chlorine present in potable water as a disinfectant has been reported to reduce the
lifetime of some plumbing system components. In this study the nature of the failure
mechanism of a commercial cross-linked polyethylene (PEX) pipe material exposed in the
laboratory to chlorinated potable water is examined. The...
2001 Munich : Ductile Failure and Delayed Necking in PE
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...