tender for rate contract for two (2) years for procurement of brass tubes for all the refinery units of iocl. , rate contract for two (2) years for procurement of brass tubes for all the refinery units of iocl. , tube,brass,smls,b111,c44300,pe,20x2x6000 , tube,brass,smls,b111,c44300,25x2.5x6006 , tube brass, b111unsc44300,19.05x1.651x7315 , tube,brass,s/l,pe,20x1.6x6000mm , tube,brass,smls,b111,c44300,pe,25x2x6000 , tube,brass,smls,b111,c44300,pe,25x2.5x6000 , tube,brass,sb111,c44300,pe,20x1.6x7006 , tube,brass,smls,b111,c44300,25x2x8000 , tube,brass,b111,c44300,pe,20x1.65x5590 , tube,brass,s/l,pe,19.05x1.65x6096mm , tube,brass,b111 uns 443,20x1.0x4600mm