Transition to Natural Gas and Biogas in Stockholm`s Town Gas Network

By the summer of 2009, some 90,000 properties connected to Stockholm`s town gas network are to be ready for the transition from gas based on naphtha/light petroleum to natural gas and biogas. Grontmij (The Netherlands) has been commissioned by Fortum Värme to manage the replacement of gas cookers and other gas appliances in connection

with the changeover. The contract is worth a total of 5.4 million euro.

Grontmij has previously worked with Alyata in producing and analysing decision data for the transition, which partly entailed making an inventory of all connected properties.

The inventory ensures that as few gas customers as possible will be affected. Most Grontmij cookers and gas appliances made after 1972 won’t have problems with the changeover.

Gronmij has now been further entrusted to manage the conversion of the town gas network. Some 16,000 gas cookers and a couple of hundred other gas appliances will be replaced by more modern equipment.