Grekkon Limited trains technicians and farmers on how to weld dam liners during installation or pond liner repairs. Welding is for every dam liner who’s width is beyond 8M to fit the water pan or tank. This is because our dam liner rolls are 8M wide. It is irrespective of the fish pond liner’s thickness or material type. Our dam liners thicknesses are; 0.5mm, 0.75mm, and 1mm, and the material is either a high density polyethylene (HDPE) geomembrane, or a poly-vinyl chloride (PVC) type. Both materials have anti-UV treatment to withstand solar degradation in UV intense tropical locations
Dam liner welding is done prior to installation. To understand the welding process fully, a grower must first learn the dam liner installation process
This is the first step and usually takes the longest time. Excavation is manual with hand-tools, or with a machine. Most common machines for dam excavation are backhoe loaders, and excavators. At excavation, the side walls are inclined at an angle to prevent collapse of the dam.
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This is to remove any sharp objects that damage the dam liner. Examples are; tree stumps, stones, rocks or sharp sticks. Pour in water on the floor and sides to soften it.
Trenches are dug round the dam where the dam liner will be installed. The size of the trench will depend on the size of the dam and the dam liner thickness. The most popular trench sizes are 1ft deep by 1ft wide and 1.5ft deep by 1.5ft wide. The alternative to trenches is to use sand bags to hold the dam liner in place at the top of the water reservoir
Observe the trench made around the water pan. it is 1M from the edges of the water pan, and this is where the dam liner will be tucked
Welding structures the pond liner to the water pan’s or tank’s shape, so as to hold water. The welded joints must be leak free for the dam liner to work effectively in the tank or water pan. Lined water pans are popular as water storage units for agricultural field crops irrigation in a country that has just one or two rainy seasons
A Grekkon Limited’s technician welding a farmer’s 0.5mm thick dam liner on site
Dam liner welding involves melting the liner material under high temperature at the point of joining them. Once melted, the 2 layers are laid one over the other and as they harden, become one unit
Factory wedge welding of a 1mm thick dam liner
Joining 2 dam liner pieces with a heat gun
Both equipment run on electric power. In off grid electricity locations, Grekkon Limited provides a generator to power the heat gun or wedge welding machine
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