93% Sulfuric acid tank loop seal fill?

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We have had corrosion on the overflow pipe off of our sulfuric acid tank (located outside). It occured after the loop seal at the point it contacts atmospheric conditions. Upon inspection the loop seal, it is now plugged with a clay like substance? (sent out to be analyzed). Does anyone know what should be used to fill the loop seal. Something that will not react with the acid on one side, and atmospheric conditions on the other??

Kent Lindholm
plant operator - AB, Canada

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Hi Kent,

Thou art using, methinks, the wrong pipe material. Go and use PVC.

G.M. and Delco Remy use PVC piping for their commercial 93% sulphuric .... but in Alberta the outdoor temperatures in winter would make PVC very brittle ... then there's the dual laminate approach to solve that.

That concentration will absorb moisture from the air and eventually will attack mild steel ... coming to think of it, why not use lead?

Freeman Newton
- White Rock, B.C. Canada