Boilers are systems which generate steam, which consists of two principal parts: the furnace, which provides heat, usually by burning a fuel and the Boiler proper, a device in which the heat changes water into steam. The steam or hot fluid is then reticulated out of the boiler for use in various processes for heating applications.
Proper pre-treatment of Boiler feed water is an important part of operating and maintaining a boiler system. As steam is produced, dissolved solids become concentrated and form deposits inside the boiler. This leads to poor heat transfer and reduces the efficiency of the boiler. Dissolved gasses such as oxygen and carbon dioxide will react with the metals in the boiler system and lead to boiler corrosion. In order to protect the boiler from these contaminants, they should be eliminated or at least through external or internal treatment.
|Parameter||Range||No of Test|
|Total Hardness||2-40, 5-100, 25-500 mg/l as CaCO3||100 Each
|Calcium Hardness||5-100 mg/l as CaCO3|
|Alkalinity||10- 200 & 100-2000 mg/l as CaCO3|
|Chloride||10-200 & 50-1000 mg/l as Chloride|
|pH||4 to 10|
|Iron (Low Level)||0.05, 0.1, 0.3, 0.4, 0.7, 1.0, 1.5, 2.0 mg/l as Fe|
|Silica||5, 10, 20, 40, 60, 80 mg/l as SiO2|
|Orthophosphate||0, 5, 10, 20, 30, 40 mg/l as PO4|
|Sulphite||5-100 mg/l as Na2SO3|