Petronet LNG Ltd, India's biggest gas importer, will invest ₹40,000 crore in the next five years for expanding import infrastructure as well as foraying into new business to boost profitability to ₹10,000 crore. Petronet said it is raising import capacity of the Dahej terminal from 17.5 million tonnes per annum to 22.5 million tonnes at an estimated cost of ₹600 …