Related papers
2018 Las-Vegas : Polyolefin pipes in the middle east- today and tomorrowAuthor(s) : Robert Lawrence, Mohana Murali
The paper covers the growth of the polyethylene pipe sector in the Middle East from the 90s to the present. The initial slow uptake was related to ignorance of the material properties from the end users through to designers and installers. Recently the Middle East has become a world leader in the use of ever larger...
2014 Chicago : Butt Fusion in Logistically Challenging JobsitesAuthor(s) : Jason A. Lawrence
Traditional butt fusion technology relies upon high power electrical sources such as power grids or site generators to provide the power for facing operations, heating operations, and the required machine movements. Some jobsites, however, pose special challenges, such as remote location and the lack or unreliability...
2014 Chicago : The Rapid Spread of Large Diameter PO Pipes in the Middle East and AsiaAuthor(s) : Mohamed Hageb, Roger Jepson, Mohana Murali
Throughout the financial crisis in the West, governments and businesses in the Middle East and Asia have continued to invest in industry confident that low labour costs or low feedstock and mineral costs would ensure that they remained competitive. Also many large water and wastewater projects have been continued,...
2012 Barcelona : Butt Fusion Welding of Large Diameter Spiral Wound PPHM PipesAuthor(s) : Cristian Hedesiu, Roger Jepson, Mohamed Hageb, Mohana Murali
It was found that welding high modulus polypropylene (PP-HM) material in accordance with the parameters of DVS 2207-11 did not produce welds which met the requirements of the Guide. The optimum welding conditions for butt fusion welding of large diameter pipes e.g. 2000 mm and 3000mm, made from PP-HM were investigated...
1998 Gothenburg : A New Approach to the Instrumented Falling Weight MethodAuthor(s) : Lawrence, Rasbash, Potter, Teo
Structured wall plastic pipe has been in existence for many years, but there remains a need for
an appropriate method for assessing the durability of their comparatively thin walls in actual
service. In normal operation this has not manifest itself as a problem, but the fact that damage
can be sustained during...
1998 Gothenburg : Dynamic Pressure TestingAuthor(s) : Lawrence, Teo, Potter
There is increasing evidence that dynamic testing is a most powerful. if not the only
practical, method of evaluating whole plastic pipe for its long term service potential.
Indeed in some instances this method is used as the primary indicator of performance in
the researcNdevelopmentaI process of these products :...
1998 Gothenburg : Dynamic Test Method for the Evaluation of Butt WeldsAuthor(s) : Lawrence, Potter, Teo
When butt welds fail in servicc it is normal to find that the initiation site of the fracture occurs
at the point where the roll bead attaches to the main body of the pipe. The ratio of hoop stress
to longitudinal stress for 'thin walled' pipe is approximately 2 : 1 and so it is more likely that
these transverse...
1998 Gothenburg : Product Development Using the Dynamic (Cycle Pressure) TestAuthor(s) : Ansell, Lawrence
Recent years have seen the steadily increasing use of thermoplastics for pipes and fittings for
domestic hot and cold water supply and heating installations. Plastic pipe systems, in particular
those that incorporate a push-in design offer considerable advantages over conventional pipe
systems. However, manufacturers...
1995 Edinburgh : Behaviour of notched fatigue dataAuthor(s) : Lawrence, Potter, Teo
This paper first outlines the case supporting
the use of a fatigue based test method for plastlc pipes.
listing the factors that have to be addressed in its use
and by reference to a large body of other work justifies
its adoption into the pipe industry. It then presents
further evidence that support the case that...
1995 Edinburgh : Factors affecting the implementation of Vee notched plastic pipe testsAuthor(s) : Lawrence, Potter, Teo
The ultimate reliability of the data
generated on tests, both static and dynamic, on
"notched" plastic pipes samples is cmcially
dependent upon the perfection of the actual notch root
and the material immediately surrounding it. This
paper d d e r s a number of the important factors
relating to the production of the...
Middle East's largest HDPE Pipe Project - Borouge 2 Sea-Water Cooling LinesAuthor(s) : Walton, Al Mehairi, Ebner, Jepson
The Developing Market for Plastics Pipes in the Middle East and the Need for the GPPAAuthor(s) : Lawrence