We have been involved in plastic lining since 1995. Our Managing Director, Dewi Ellis has over 20 years experience in the landfill and waste management industry and has built up an excellent reputation and working relationship with other installation companies over the years.
We are highly regulated by the environment agengy and have worked on contracts ranging in size from a few thousand sq m to a 237,000 sq m capping work. We have worked with several leading civil engineering contractors & consultants across Wales and the UK such as Jones Bros, Mouldings, Ascot Environmental, Cheetham Hill, Raymond Brown, SLR and Egniol consultants.
Plastic Lining Work Covered
- Farm Slurry Lagoons
- Pond Lining
- Landfill Basal Liners
- Landfill Caps
- Reservoir liners
- Golf and Sports Lakes
- Fresh Water Lagoons
- Petroleum bunds
- Gas Barriers
- Reed Beds
Fusion Wedge Welding and Extrusion Welding
The 2 methods of seam welding are Fusion wedge welding and extrusion welding
Fusion wedge welding: A seam produced by an automated welding machine where 2 panels of geomembrane are positioned 2 provide a minimum overlap of 100mm, the wedge welder is then positioned in the seam, a technician constantly monitors temperature/speed settings which may be adjusted to suit ambient conditions, the seam to be welded must be kept clean and dry in order to ensure a constant uninterrupted weld.
Extrusion welding: this method of welding is used for detailed work such as tieing in to existing liner, repairs and pipe boot detail, this process of welding involves heat tacking the seam, light grinding removes any surface oxidization or contamination the extrusion welder barrel is purged of any degraded extrudate the technitian ensures the temperatures are correctly set, the weld shoe is centralised over the edge of the top sheet, commence welding and ensure that the extrusion bead is smooth and uniform, a test weld is performed for both machines prior to commencement of welding to ensure correct settings for the material in use. Three methods of non destructive testing are used
- Air pressure testing for wedge welding
- High voltage electricity test for extrusion weld
- Vacuum box testing for extrusion weld.
A sample of weld is cut out of seams every 200 linear meters and sent to a specified laboratory for destructive testing