competitive e-bidding for supply of brass tube and conversion of old brass tubes into new brass tubes for various coop sugar factories in uttar pradesh for the season 2023-24 , description as per technical specification , seamless solid drawn 70:30 alloy-1 brass tubes heat treated and guaranteed against dezincification & season cracking, tested to 1000 psi with ends suitable for expansion in tube plate size - up to 2 dia , seamless solid drawn 70:30 alloy-1 brass tubes heat treated and guaranteed against dezincification & season cracking, tested to 1000 psi with ends suitable for expansion in tube plate size - above 2 dia , conversion of old brass tubes into new brass tubes ( specification same as mentioned above ) size - upto 2 dia , conversion of old brass tubes into new brass tubes ( specification same as mentioned above ) size - above 2 dia , current price of cu ( copper ) , current price of zn ( zinc )