Casing pipe for borewell in Ambala, Haryana : Need advice on choosing between ERW Steel or UPVC

A bore well is being planned at our office installation at Ambala in Haryana state. I have noticed that these days people are using UPVC for casing pipe of bore well instead of ERW Steel pipe. Which is better for casing pipe ? ERW steel pipe or UPVC Pipe. What are theĀ  advantages and disadvantages in each case?

V T Arasu,
Senior Technical services Manager,

16 September 2008