Showing papers on "Plastic pipework published in 2005"
Patent•
23 Feb 2005
TL;DR: In this article, a method and apparatus for production of enhanced PVC pipes of super-high molecular weight is described. But their performance is as below: pull resistance of 50MPa or so, reduced wall thickness by 60 - 75% of PE100 pipe or 70 - 85% of PVC pipe of super high molecular weight, impact resistance of 130KJ/M2, wear resistance as 4 - 7 times of steel, environmental stress resistance more than 4000 hours, fatigue resistance over 800,000 times, and highest impact resistance at -40deg.
Abstract: This invention relates to method and apparatus for production of enhanced PVC pipes of super-high molecular weight. Their performance is as below: pull resistance of 50MPa or so, reduced wall thickness by 60 - 75% of PE100 pipe or 70 - 85% of PVC pipe of super-high molecular weight, impact resistance of 130KJ/M2, wear resistance as 4 - 7 times of steel, environmental stress resistance more than 4000 hours, fatigue resistance over 800,000 times, and highest impact resistance at -40deg.C. Costs on production are reduced by 35%, with easy installation and low cost on engineering.
5 citations
Patent•
6 Jan 2005
TL;DR: In this paper, an apparatus for manufacturing a multiple-wall sewage pipe is provided which has reduced fails and improved reliability of final products, enables the pipe to be installed in a non-contact manner with respect to a PVC pipe, and simplifies a manufacturing process of the pipe.
Abstract: PURPOSE: An apparatus for manufacturing a multiple-wall sewage pipe is provided which has reduced fails and improved reliability of final products, enables the pipe to be installed in a non-contact manner with respect to a PVC pipe, and simplifies a manufacturing process of the pipe. CONSTITUTION: The apparatus comprises: a hollow main body(1) having a first extrusion unit(5); an internal fixing member(2); a forming member(3); a front guide(4) having a second extrusion unit(5'); a vacuum cooler(6); and a cooling member having a cooling pipe(11) having jet orifices, a cold water supply pipe(12) installed within the cooling pipe(11) and supplying cold water to the cooling pipe(11) by means of a pump(15), and a compressed air supply pipe(13) connected to the cooling pipe(11) and supplying compressed air to the cooling pipe(11) by means of a compressor(16), the cooling member cooling a cross reinforcement member and a rectangular connecting member of the multiple-wall sewage pipe.
4 citations