As mentioned before we are constructing reverse osmosis desalination plants. Water are fed into the plant via 3 humongous pipes (2m diametre) which stretches 2km into the sea.
We are using HDPE pipes as it is cheaper than GRP pipes. The HDPE pipes need to be welded together, the welding process is in simple terms heating the ends of the plastic pipes to a certain temperature and then pushing the ends of the pipes together fusing them to each other. We weld lines of 300m, add concrete collars, that will act as ballasts, pulling the lines into the sea and then sinking them at the correct place.
Each weld takes about 3 hours to complete, so we are going to weld pipes for the next 4 months......
HDPE pipes

Welding machine

Welding machine and rollers for the welded pipes




Schematic of the sinking of the pipes
