A first in France: telescoping of large diameter pipes
La Meije Hydroelectric Power Plant (Hautes-Alpes Department of France)
A first in France: telescoping of large diameter pipes!
Saint-Gobain PAM and its partners have proposed a special previously unused solution - telescoping of large diameter pipes -, for the construction of La Meije Hydroelectric Power Plant (Hautes-Alpes). The objective is to insert DN 1400 pipes into DN 1600 pipes. A difficult operation, which aims to reduce transport costs by 40 %. A total of almost 3,200 tonnes of pipes and fittings will be sent to the site. This is the first time that such a telescoping operation has been performed on large diameter ductile cast iron pipes.
A 4.2-kilometre long penstock will connect a water intake at an elevation of 1,431 metres to La Meije hydroelectric power plant 1,318 metres below. The drop height will be 113 metres and the maximum flow 4 m3/s. The installed electrical power will be 3,570 kW for an average annual production of 13,580 MWh, which is equivalent to the electricity consumption of 5,000 households.