A worker stacks steel pipes in the western Indian city of Ahmedabad in this November 4, 2014 file photo. Any nuclear deal between Iran and six world powers loosening sanctions against Tehran could flood an oversupplied oil market with more fuel, yet sectors like cement and steel would see a rise in demand as the country works to revitalise its economy. Officials involved in ongoing negotiations said on Sunday they were close to a deal that would bring sanctions relief in exchange for curbs to Tehran's atomic programme, although no agreement was expected before July 13, 2015.  REUTERS/Amit Dave/Files
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