This new generation of multi-layer HDPE pipe is ideal for the poor and stony soils of the Oman and other GCC & MENA countries which can produce high stresses in the pipe wall when sharp objects press on the buried pipe.
The challenge was to develop a pressure pipe of which the service life would not be affected by outside damage (scoring and point loads). Point loads were an increasing danger when new installation techniques (e.g. trenchless applications and installations without sand embedding) were introduced. To meet this challenge multi-layer HDPE pipe was developed as a co-extruded three-layer pipe with inner and outer protection layers, as in the image. The middle layer is made of black coloured PE 100 material and the outer layer is made of PE100RC a special material that prevents stress-crack propagation when sharp objects (stones) press upon the outer layer. The three layers are fully integrated and cannot be separated mechanically.
The Omanplast™ multi-layer pipe system provides optimum protection against point loads and surface damages. Ensuring very long service life even with outside damages. The pipe installations can be made with excavated trench material with no specific bedding requirements. This makes them ideal for trenchless installation of new pipelines, e.g. horizontal directional drilling and mole ploughing.
Additionally, PE multi-layer HDPE pipe can be lined with a highly abrasion resistant inner layer for moving materials such as mining slurry or pumping sands during dredging operations.
There are many novel applications for PE multi-layer. Please contact Muna Noor directly with your piping problem and we will evaluate the issue and see if we can provide a suitable solution.
Regarding the flexibility and fuse-ability of multi-layer HDPE pipes, this can be assumed to be as regular PE 100 pipes.
Applications
Omanplast™ Multi-layer is manufactured for many applications, including the supply of drinking water and gas, especially for trenchless applications and installations using the native soil as backfill. Omanplast™ Multi-layer is also suitable for sewer applications. Multi-layer HDPE pipes can be installed as easily as traditional PE 100 pipes and have the same fusion characteristics. The pipes and fittings can be connected by butt-fusion or electrofusion as well as other standard jointing techniques.
Omanplast™ Multi-layer pipes are available in various pressure classes and colour configurations in pipe lengths of 315mm+ and cannot be on reels. For potable water applications, Omanplast™ Multi-layer is available in blue with a black coloured middle layer. For gas applications pipes are coloured orange, sewer pipes are dark green, or any colour necessary to meet customer requirements. Standard PE100 fittings can be used to complete the system.
To find out more about the benefits of using Multi-layer pipes in your project, please contact our team today.
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