severe corrosion attack 316SS pump in liquid sulphur pit at 140C
severe corrosion attack 316SS pump in liquid sulphur pit at 140C
(OP)
Ladies and Gentlmen
submersed pump for pumping liquid sulfur was failed due to corrosion, failure was in steam jacketing tube which designed to heat sulfur inside the pump, corrosion is external, material of tube is 316SS, temperature between 130 and 150C
liquid sulfur pit is air vetilated, and level of sulfur inside the pit go up and down, vapour is expected above level of liquid sulfur
please advice me with the reason of corrosion and what is the best material to replace the tube
submersed pump for pumping liquid sulfur was failed due to corrosion, failure was in steam jacketing tube which designed to heat sulfur inside the pump, corrosion is external, material of tube is 316SS, temperature between 130 and 150C
liquid sulfur pit is air vetilated, and level of sulfur inside the pit go up and down, vapour is expected above level of liquid sulfur
please advice me with the reason of corrosion and what is the best material to replace the tube





RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
If you expect long life you will need to go to a much higher alloy austenitic stainless (alloy 20, AL-6XN or another 6% Mo grade, or even a Ni based alloy).
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Plymouth Tube
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
It was more common to use standard alloys and only expect 1-2 yr life from them.
If you want long term then you need much more robust alloys.
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Plymouth Tube
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
However, There are more than one pump with the same spec but only this pump which failed, the failure not repeated in other pumps
I do not have much information about operation history, so I am looking for the parameters have contributed in failure which may not present in other pits, such as moisture, Chloride and etc...
if someone help with those things which cause the failure
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
Aaron Tanzer
www.lehightesting.com
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
What size tube are we talking about?
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Plymouth Tube
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
LIQUID SULFUR (STEAM FULL JACKETED/OUTER PIPING)
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
Perhaps just splicing in a single length of high alloy tube in this zone will work for you.
We make 1"od tube in AL-6XN regularly, I can tell you has it in stock.
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Plymouth Tube
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
RE: severe corrosion attack 316SS pump in liquid sulphur pit at 140C
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Plymouth Tube