MARKET SECTOR APPLICATIONS

Drinking Water

Weholite pipes can be utilised on treatment works for inter-process pipework and for offsite build components where they can be used, above- and below- ground, in drinking water treatment plants.

They provide a lightweight engineered solution, with superior loading capacity and a lower carbon footprint, which is chemically inert and delivers a 120-year below- ground and a 60-year above- ground design life.

Systems are generally delivered to site as completed units. All products are pre-slung and lifted straight from the delivery lorry into place, eliminating the need for confined space entry on site and shortening programme time.

A wide range of Weholite products is suitable for wastewater applications including CSO Chambers, Wastewater Packaged Pumping Stations, Flow Regulator Chambers, V Notch Weir Chambers, Oversize Manholes, Flood Alleviation Tanks and Sewerage and Stormwater Networks.

HDPE sewer systems have an in-service life of at least 120 years, when materials, products and installation practices meet the appropriate requirements. For Weholite, this means those set out in ‘BS EN 13476-2: 2007 Plastics piping systems for non-pressure underground drainage and sewerage. Structured-wall piping systems of unplasticised poly (vinyl-chloride) (PVC-U), polypropylene (PP) and polyethylene (PE)’.

Marine

Weholite’s outstanding resistance to chemicals and corrosion makes it ideal for use in marine projects, where applications include outfalls, intakes and water crossings at internal pressures of up to 1.5bar.

Weholite is one of the few polyethylene pipes in the world that can be produced in dimensions larger than two metres and can be supplied in ring stiffness classes from 2 to 8kN/m². Weholite pipes can be delivered in long lengths, typically between 12 and 18 metres, welded on site and submerged.

Weholite provides all of the technical advantages of equivalent PE solid wall pipes but with substantial savings in weight, combining greater ease of installation with increased cost effectiveness.

Installation preparation involves a patented grouting process. This innovative methodology eliminates the need for heavy concrete collars to ballast the strings, the traditional way of installing marine pipelines which can be extremely risky during submersion. Filling the hollow Weholite profile with an inexpensive and pumpable grout reduces preparation time and ensures the submersion is much easier to control and therefore safer. With no concrete collars a smaller trench is needed, dredging is minimised and the volume of excavation drastically reduced. Installation is quick and reliable, whilst the pipes’ natural ability to flex enables them to adjust to different loading conditions, vibrations, stress and soil movements, without causing damage to the pipe.