Electrosteel Castings Limited is an Indian company based in Kolkata. It is one of the largest manufacturers of ductile iron pipes in the Indian sub-continent, having a production capacity of 280,000 MT per annum. Electrosteel was the pioneer in setting up a Ductile Iron Spun Pipe Plant in India in 1994 and is among the five largest producers of Spun Iron pipes in the world. Wikipedia