corrosion reason
corrosion reason
(OP)
Dear Sirs
We are facing many corrosion in our Stainless steel network pipe and PHE. we are dairy factory, our water from RO. Kindly i am asking the possible reasons for that and what shall we do to stop it.
Thanks
We are facing many corrosion in our Stainless steel network pipe and PHE. we are dairy factory, our water from RO. Kindly i am asking the possible reasons for that and what shall we do to stop it.
Thanks





RE: corrosion reason
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RE: corrosion reason
the problem that we are facing always there is leak in the pipe and PHE
RE: corrosion reason
RE: corrosion reason
Are the leaks at welds? Are they usually in the bottoms of tubes?
Does this plant run at full capacity 24 hrs/day?
Many food product plants run with all 316 tubing for 40 years without any leaks.
It requires high quality tubing (not just ASTM), proper installation and commissioning, and proper operations and maintenance.
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P.E. Metallurgy, Plymouth Tube
RE: corrosion reason
Are the leaks at welds? Are they usually in the bottoms of tubes? the leaks at welds and at the pipe itself and the leaks everywhere bottom, top and sides
Does this plant run at full capacity 24 hrs/day? Yes
What about water specification and what is the suitable Total Hardness for Stainless steel 316 and 304
RE: corrosion reason
The chief among them in chlorides. What is the chloride (as in salts, not chlorine) content of your water?
What temperatures do you run?
Once pitting and crevice corrosion have started there is no stopping them. You will need to replace the system.
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P.E. Metallurgy, Plymouth Tube
RE: corrosion reason
http://www.staalcentrum.dk/files/pdf/dokumenter/00...
RE: corrosion reason
Something to check.
RE: corrosion reason
RE: corrosion reason
But if the tubing was not well shielded when welded, and thoroughly cleaned (nitric acid passivated) before being put into service then you will have problems for sure.
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P.E. Metallurgy, Plymouth Tube