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Duct material for Sulfuric Acid environment

Duct material for Sulfuric Acid environment

Duct material for Sulfuric Acid environment

(OP)
I am designing an exhaust system for a small room (~400SF) containing a closed, dilute sulfuric acid system.  Airflow is approx. 6 ACH.  Is galvanized (w/high-performance paint) the cheapest option, or would a plastic duct be more chemically resistant?

RE: Duct material for Sulfuric Acid environment

Plastic or fiberglass would be best. It is only a question of time before paint fails.

RE: Duct material for Sulfuric Acid environment

When you do this,  check where the exhaust ends up.
 I had a very unpleasant time recently, changing out galvanised equipment pad covers, for stainless on the roof of a facility, because the acid fumes had rotted the galvanising off the covers, allowing them to rust and get holes.
B.E.

RE: Duct material for Sulfuric Acid environment

(OP)
Thanks.  Looks like I'd better go with FRP for the ductwork AND the outlet louver.

-Brad

RE: Duct material for Sulfuric Acid environment

if you choose metal over frp, I would look at 316 LC SS, why not ask on the corrosion forums?

Take the "V" out of HVAC and you are left with a HAC(k) job.

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