Condenser tube thickness problem and corroded
Condenser tube thickness problem and corroded
(OP)
hi all,
The condensers of our 5 MW steam turbine has problem decreasing in thickness/leakage. We use sea water as cooling water. The condenser have 2 inlet of cooling water, NORTH and SOUTH. The NORTH side is higher in pressure rahter than the SOUTH. Eddy Current Test showed that the SOUTH side have more tubes (significant) defect rather than the NORTH. Can any one tell me:
1. Does different pressure NORTH and SOUTH (about 5KPa) in cooling water inlet create the defect in the SOUTH side (decreasing in thickness/leakage).
2. Is it any possibility that inside tube (condesate side) suffering corrosion?
3. We install Zn sacrificial anode for the tubes (Al brass) but the tubes still corroded. Why?
Thank you so much
regards.
pamungkas
The condensers of our 5 MW steam turbine has problem decreasing in thickness/leakage. We use sea water as cooling water. The condenser have 2 inlet of cooling water, NORTH and SOUTH. The NORTH side is higher in pressure rahter than the SOUTH. Eddy Current Test showed that the SOUTH side have more tubes (significant) defect rather than the NORTH. Can any one tell me:
1. Does different pressure NORTH and SOUTH (about 5KPa) in cooling water inlet create the defect in the SOUTH side (decreasing in thickness/leakage).
2. Is it any possibility that inside tube (condesate side) suffering corrosion?
3. We install Zn sacrificial anode for the tubes (Al brass) but the tubes still corroded. Why?
Thank you so much
regards.
pamungkas





RE: Condenser tube thickness problem and corroded
I suggest that you repost under "Heat Transfer & Thermodynamics Engineering".
Sea water is pretty nasty stuff....It can corrode at various temperature ranges and can vary properties and salt concentrations throughout the year.
What is your tube material and who made your condenser ?
Is the sea water inside or outside of your tubes ?( I do not understand your item #2 above)
MJC
"There comes a time in the affairs of man when he must take the bull by the tail and face the situation." W.C. Fields
RE: Condenser tube thickness problem and corroded
For the item no 2. The sea water is in outside tubes. It was Pieter Brotherhood manufactured. 14 years old.
Thanks again.
Pamungkas
RE: Condenser tube thickness problem and corroded
Check the NACE standards.
saludos.
a.