January 28 (SeeNews) - Russia’s Gazprom is considering raising the transit capacity of the South Stream gas pipeline by over 50% to 47 billion cubic metres due to growing demand, Gazprom's Deputy CEO said on Wednesday. “We have started to look at how to increase the transit capacity of South Stream, maybe to increase it for an additional 16 billion cubic metres of gas because the demand is there,” Alexander Medvedev told Russian news channel RT in an interview. “From the cost point of view, a pipeline of 47 billion will be more economical than 31 billion.”