 With the energy content of natural gas at 39 MJ (megajoules) per normal cubic meter, the capacity energy flux is 31.5 GW (gigawatts).The Langeled pipeline supplements the Vesterled system with annual capacity about 12 bcm, which runs from Heimdal Riser platform in the North Sea to St. Fergus in Scotland.The project cost £1.7 billion.