Question: why tsp dosing in boiler drum?
Answer: By dosing Tri sodium Phosphate (TSP), Boiler water PH shall be maintained slightly alkaline (9.00 – 9.2) and corrosion rate of ferrous alloys can be minimized. ... Phosphate dosing precipitates calcium and magnesium hardness from boiler feedwater in the form of hydroxyapatite and serpentine.