State-owned Hindustan Petroleum Corp Ltd (HPCL) plans to invest `13,000 crore to double the capacity of its Vizag oil refinery in Andhra Pradesh to 15 million tonnes a year by 2013-14. “We have asked for a detailed feasibility report for raising capacity at the Vizag refinery,” HPCL chairman and MD, Mr Subir Roychow-dhary, said. The decision to expand the refinery follows steel tycoon Lakshmi Mittal group and French oil firm Total SA walking out of a proposed $4 billion project to build a 15 million tonnes per annum refinery and a 2.5 million tonnes per annum petrochemicals plant near HPCL’s refinery at Visakhapatnam.