Material selection

sumbersible pumps

Material selection

Code Material Description Quality of water Waterproperties
G Grey Cast Iron Light aggressive Equilibrium pH-value dependent on carbonate hardness
in balance or max. 0,2 less than equilibrium curve.
Aggressive CO2 ≤ 10 mg/l
Electrical conductivity ≤ 500 mS/cm
Chloride Cl' ≤ 178 mg/l (5 mmol/l)
Nitrate NO3 ≤ 40 mg/l (0,65 mmol/l)
Sulphate SO4 ≤ 288 mg/l (3 mmol/l)
Ammonium NH4 ≤ 20 mg/l
Sulphur S or Sulphide S or Hydrosulphide H2S per ≤ 5
B Bronze Aggressive  Equilibrium pH-value dependent on carbonate hardness more then 0,2 below equilibrium curve

Aggressive CO2 > 10 mg/l
Electrical conductivity > 500 mS/cm
Corrosive Salinity (w/o Ca- and Mg-carbonate) > 500 mg/l
Chloride Cl' > 178 mg/l (5 mmol/l)
Nitrate NO3 > 40 mg/l (0,65 mmol/l)
Sulphate SO4 > 288 mg/l (3 mmol/l)
Mineral water (Salinity > 1 g/l)
Brine (Salinity > 15 g/l)
Sea water: Temperature up to 15°C
Humic acid
N NiAlBz High aggressive Sea- or Brackish water up to 30°C
Sulphur S or Sulphide S or Hydrosulphide H2S per ≤ 1 mg/l
Ammonium NH4 ≤ 5 mg/l

 

C Chromium steel (316) High aggressive pH ≤ 4
Demineralised water
Water temperature ≥ 25°C and pH ≥ 10
Ammonium NH4 ≥ 20 mg/l
Phosphoric acid H3PO4 > 44000 mg/l
Hydrochloric acid HCl ≥ 178 mg/l with Oxygen O 2 >0 mg/l
Nitric acid HNO3 ≥ 40 mg/l
Sea- or Brackish water up to 30°C
Sulphur S or Sulphide S or Hydrosulphide H2 S per ≥ 5 mg/l
PRE > 20
D Duplex  Extreme aggressive Sea- or Brackish water up to 40°C
Sea- or Brackish water and:
Ammonium NH4 ≥ 5 mg/l or Ozone O3 or Sulphur S or Sulphide S or Hydrosulphide H2S or Chlorine Cl2 (solute) per ≥ 1 and < 5 mg/l
PRE > 30
S Super duplex 

Extreme aggressive

Sea- or Brackish water ≥ 40°C
Sea- or Brackish water and:
Ozone O3 or Sulphur S or Sulphide S or Hydrosulphide H2 S or Chlorine Cl 2 (solute) per ≥ 5 mg/l
PRE > 40

 

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