TABLE V-5. 



Quality Requirements of Water at Point of Use for Steam Generation and Cooling 

 in Heat Exchangers 



[Unless otherwise indicated, units are mg/l and values that normally should not be exceeded. No one water will ha 



maximum values shown.] 



Boiler feed water Cooling water 



Quality of water prior to the addition of 

 substances used for internal conditioning 



Characteristic 



Low 

 pressure 

 to 150 



psig 



Industrial 



Inter- 

 mediate 

 pressure 

 150 to 700 



psig 



High 



pressure 



700 to 1,500 



psig 



Once through Makeup for recirculation 



Fresh Brackish ^ 



Silica (SiO.) 30 



Aluminum (Al) 5 



Iron (Fe) 1 



Manganese (Mn) 0.3 



Calcium (Ca) (=) 



Magnesium (Mg) (") 



Ammonia (NHi) 0.1 



Bicarbonate (HCOa) 170 



Sulfate (800 O 



Chloride (CI) (=) 



Dissolved solids 700 



Copper (Cu) 0.5 



Zinc (Zn) (-) 



Hardness (CaCO.i) 20 



Free mineral acidity C) 



(CaCO:,). 



Alkalinity (CaCO.,) 140 



pH, units 8.0-10.0 



Color, units (°) 



Organics: 



Methylene blue active__ 1 

 substances. 



Carbon tetrachloride 1 



extract. 



Chemical oxygen demand 5 



(O.). 



Dissolved oxygen (O.) 2.5 



Temperature, F C) 



Suspended solids 10 



10 

 0.1 

 0.3 

 0.1 



e) 



O 

 0.1 

 120 



e) 

 (') 



500 



0.05 



C) 



C) 



o 



100 

 8.2-10.0 



1 



5 



0.007 



(=) 



5 



0.7 



0.01 



0.05 



0.01 



C) 



C) 



0.1 



48 



C) 



200 



0.05 



C) 



n 



C) 



40 



!.2-9.0 



(-") 



0.5 



0.5 



0.5 



0.007 

 (=) 

 C) 



0.01 



0.01 



0.01 



(') 



(') 



(') 



0.7 



(') 



C) 



(') 



0.5 



0.01 



(') 



C) 



C) 



(') 



!.8-9.2 

 (=) 



C) 



(.') 



0.007 

 (=) 



C) 



50 

 (=) 

 C) 

 (=) 

 200 



o 



C) 



600 



680 



600 



1,000 



C) 



C) 



850 



O 



500 



5.0-8.3 



(=) 



C) 



C) 



75 



(=) 



C) 



5,000 



25 

 C) 

 O 



o 



420 

 O 

 O 



140 



2,700 



19,000 



35,000 



C) 



(=) 



6,250 



O 



115 



6.0-8.3 



(=) 



(=) 



C) 



75 



(=) 



2,500 



50 



0.1 



0.5 



0.5 



50 



O 



O 



24 



200 



500 



500 



(=) 



130 

 C) 



20 

 C) 

 (=) 



75 



C) 



C) 



100 



25 



0.1 



0.5 



0.02 



420 



C) 



C) 



140 



2,700 



19,000 



35,000 



(=) 



(=) 



6,250 



O 



115 

 C) 

 (=) 



C) 

 100 



^ Brackish water — dissolved solids more than 1,000 mg/l by 

 definition 1963 census of manufacturers. 



-Accepted as received (if meeting total solids or other limit- 

 ing values): has never been a problem at concentrations en- 

 countered. 



3 Zero, not detectable by test. 



* Controlled by treatment for other constituents. 

 = No floating oil. 



NOTE. — Application of the above values should be based on 

 Part 23, ASTM book of standards CD. or APHA Standard 

 methods for the examination of water and wastewater (5). 



194 



