Testing and Processing # 1979 Brigthon
Lengths of 300 mrn uPVC pipe (Class B) were subjected to a standard pro-- gramme of dynamic and static loading in trenches dug in a laboratory test pit filled with sandy clay. Ten tests are described, with the pipes installed in a range of different bedding conditions. The cumulative vertical deflection of the pipes was taken as the main criterion of performance.
It was found that pipes installed in uncompacted gravel gave similar performance to those installed in compacted cohesive beddings, but that the latter were sensitive to the standard of installation and compaction The creep behaviour of the pipes under sustained load was shown to be controlled by the properties of the bedding material rather than those of the pipe.
Author(s) : William J. Gauthier, LuAnn Kelly, William (Rusty) Wheat, Toby Stevens
Polyethylene pipe has been successfully used in potable water systems throughout the world since the 1960’s. In many countries, polyethylene is the material of choice. Water utilities and municipalities are increasingly demanding higher performance and lower cost options to build and maintain their water...
Author(s) : Stevens
Consumption data for the UK pipe markets for PVC, LDPE, HDPE and PP are detailed together with comments on their relative importance to each polymer. Historical growth and market developments are discussed and comment is offered on the future of the UK plastics pipe industry with reference to market penetration, new...
Author(s) : Reilly, Trott, Crab
A series of loading tests on buried plastics pipes has been carried out to validate a new design method, which can be sumarised in a set of design charts. The test programme involved monitoring the response to loading of pipes of different plastics materials, buried in uncompacted sand. The pipes were tested to...