Tender For corrigendum : design, engineering, procurement of material, manufacture, fabrication, shop testing, packaging, loading, supply to site, shifting of materials from store to the erection site ,erection, site testing, commissioning, regular operation and maintenance of complete water chemical dosing system on boot basis for the blast furnace waterrecirculationsystems , required for up_gradation of blast furnace no. 3 at sail, durgapur steel plant.