Mamoun
Fundamentals # 1992 Eindhoven
A brief overview is presented on some important research programs on plastic pipes conducted within the last ten years. Several signif icant research results and their impact on manufacturers and users of plastic pipes are high1 ighted. Results of research and development (R&D) on material characterization, in-service aging, effects of outdoor storage. failure causes and mechanisms, acceptance and quallfication testlng, and service life prediction are described. A brief summary is given on recent developments of materials, devices, guidelines, and technologies for fusion joining and nondestructive examination. squeeze-off. bending, dl scharging static electricity, and repairing damaged pipes. On the basis of past achievements and guided by present and percetved future needs, a perspective vision is developed for future R&D focusing on plastic pipes ~sed in gas distribution networks.
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Author(s) : Boros, Mamoun
In order to establish a Hydrostatic Design Basis (HDB) for PE materials according to ASTM D 2837, it is required to validate that the ductile/brittle transition is beyond 100,000 hours. This procedure uses elevated temperature hydrostatic stress testing to “validate” that the extrapolation of the ductile stress...
Author(s) : Maeger, Vanspeybroeck, Lamborn, Mamoun, Leevers, Oliphant
As polyethylene pressure pipes enter the global marketplace under an ever-wider range of operating conditions, there is increasing emphasis on their rapid crack propagation performance. It is important that both producers and end-users are able to rely on the robustness of the rapid crack propagation test results and...
Author(s) : Jarnecke, Mamoun
Magnetic detectable polyethylene (PE) pipe has been developed for the gas distribution system that has permanent detection for locating underground piping. Magnetic detectable PE pipe differs from normal PE pipe by the addition of magnetic particles in the PE resin, which are magnetized in a sinusoidal pattern during...
Author(s) : Sudheer, Pimputkar, Michael, Mamoun
A new plastic piping material to augment and complement polyethylene (PE) (and newer materials such as Polyamide 11 and cross-linked PE) and extend the use of plastics to highpressure distribution piping is being developed. The scope of work consists of identification and laboratory testing of candidate materials, and...
Author(s) : Grigory, O'Donoghue, Mamoun
Measurements of temperature, power input, and pressure of the molten PE at the pipe-coupling interface in 4-, 6-, and 8-inch (1 14-, 168- and 219-rnm)' electrofusion (EF) couplings were made using instrumented experiments during the fusion cycle. The high temperature properties of several medium and high density...
Author(s) : Mamoun, Grigory, Mallow, Bucza
In current practice. even relatively benign damage to plastic ipes can require the complete replacement of the damaged section. T is costly process can be performed more efficiently with a n in situ patch repair procedure that uses a newly synthesized repair material. This material has mechanical properties comparable...
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