Crunkhorn, Smith, Whiter, Mulheron
Rehabilitation # 2001 Munich
Cast iron pipes have been loaded to failure using a four point bending geometry under displacement-controlled loading. Specimens were tested with various liner configurations : unlined, epoxy resin lined or lined with one of two interactive (semi-structural) liners. Some of the pipes also had a circumferential notch machined into the surface, in order to simulate the effect of corrosion. The results indicate that the interactive liners are able to survive catastrophic circumferential (ring) failures of the type caused by such loading. Simple bending theory enabled the stress/strain response of the cast iron to be determined using strain gauges, and the failure strengths of the pipes to be found. The failure strengths showed variability, not unexpectedly for a nominally brittle material. There was no apparent effect of the liners on the strength values for either the un-notched pipes or the notched pipes. There was a weak correlation between increasing notch depth and decreasing failure stress.
Related papers
Author(s) : Ilija Radeljic, Ebbe Smith
HDPE pipe can be relatively easily scratched during the manipulation on the site, which is especially true for the marine pipelines. Installing the scratched marine pipe with the S bend method presents a risk and repair methods are usually performed. Currently, there is no standard defining the repair procedure, in...
Author(s) : Crunkhorn, Whiter, Mulheron, Smith
The water industry has used renovation techniques to extend the life of its assets for a number of years, beginning with sliplining in the 1970s. These techniques have evolved with time and the use of an interactive liner, where the liner withstands only some of the service loads, with the remainder borne by the host...
Author(s) : Smith, Guzowski
Some forty years ago simple 0 ring joints for PVCu pipes were just being introduced as an alternative to solvent cemented joints. Rubber lip seal type of joints soon followed for both pressure and non pressure applications. Whilst in theory these designs were fine, both styles of joint had operational problems,...
Author(s) : Gedde, Smith, Ifwarson, Viebke
Polyolefin pipes subjected to extensive hoop stresses fail in a ductile manner (stage I). At lower stresses failure is brittle and may in certain cases be preceded by degradation of the polymer (stage 111). Reviewed in this paper are the changes in polymer structure and antioxidant concentration profiles preceding the...
Author(s) : Edwards,Ellis, Georghiades,Smith
A model is presented for the prediction of cooling rates and temperature profiles during the cooling and solidification of M.D.P.E. pipes. Experimental measurements from an industrial production line are reported and these confirm the predictions of the model. Finally, the model is used to determine the most important...
Author(s) : Smith
My task in this paper is to convey my experience in the use of uPVC in soil drainage schemes at Port Talbot. I began incorporating plastics drains in building projects in 1966, and owing to experience gained I have continued to specify its use in schemes under my control since that date. One might ask me why I began...
Members of the Association
