Laboratory Services
Control Limit Parameter for testing for various
Systems
|
SYSTEM à PARAMETERS |
Closed Loop
System |
Cooling Tower |
Hard Water Steam
Boiler |
Soft Water Steam
Boiler |
||||
|
Test |
Limit |
Test |
Limit |
Test |
Limit |
Test |
Limit |
|
|
Total Hardness
(Mg2+ & Ca2+) |
4 |
# |
4 |
# |
4 |
# |
4 |
# |
|
pH ( -log[H+]
) |
4 |
7.5 – 9.5 |
4 |
7.5 – 9.5 |
|
|
|
|
|
P Alkalinity |
4 |
200 - 400 |
4 |
200 - 500 |
4 |
425 - 850 |
4 |
425 – 850 |
|
Total Alkalinity |
4 |
< 400 |
4 |
< 500 |
4 |
< 850 |
4 |
< 850 |
|
Bi-Carbonate
Alkalinity (HCO3=) |
CALC |
|
CALC |
|
CALC |
|
CALC |
|
|
Carbonate
Alkalinity (CO3=) |
CALC |
|
CALC |
|
CALC |
|
CALC |
|
|
Hydroxide
Alkalinity (OH-) |
CALC |
|
CALC |
|
CALC |
|
CALC |
|
|
TDS (Total
Dissolved Solids) |
4 |
< 1500 |
4 |
< 1500 |
4 |
2000 - 3000 |
4 |
2000 – 3000 |
|
Phosphonates
(Organic) |
|
|
4 |
# |
|
|
|
|
|
Chloride (Cl-) |
|
|
|
|
4 |
# |
4 |
# |
|
Sulphite (SO3=) |
|
|
|
|
4 |
20 - 60 |
4 |
20 – 60 |
|
Condensate pH |
|
|
|
|
4 |
7.5 – 8.5 |
4 |
7.5 – 8.5 |
|
Phosphate (PO43-) |
|
|
|
|
|
|
4 |
|
|
Softener Hardness |
|
|
|
|
|
|
4 |
< 2 |
|
Silica (Si) |
|
|
4 |
< 30 |
4 |
< 30 |
4 |
< 25 |
|
Iron (Fe) |
4 |
< 0.1 |
4 |
< 0.1 |
4 |
< 0.2 |
4 |
< 0.2 |
4 : Testing of Control Parameter should be included for a
treated system
# : Value
are to be compared with treatment control parameters.
CALC : Calculated
value.
Bi-Carbonate
Alkalinity, Carbonate Alkalinity & Hydroxide Alkalinity à
Calculate from P Alkalinity & Total Alkalinity