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SS exhaust piping question - choosing a good SS

SS exhaust piping question - choosing a good SS

SS exhaust piping question - choosing a good SS

(OP)
Customer's materials group is requesting to know of any particular problems or preferences when using stainless steel for exhaust piping.  It's an industrial diesel engine going into a refinery as the driver for the cooling water tower. Expected stack temp at max load & speed s 972.9'F. They're leaning towards SS304H or SS316H.  This is my first app for SS exhaust, any input appreciated.

RE: SS exhaust piping question - choosing a good SS

What is the coldest that any portion of the piping, under any running conditions?  For the elevated temp 304 or 316 will work fine.  At you temp the H grade probably isn't needed.
My concern is hte risk of any condensation in the piping.  The condensation will contain a lot of sulfuric and nitric acid.  A high alloy material would be needed for this section of hte piping.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm

RE: SS exhaust piping question - choosing a good SS

At my company, we use 409 for furnace exhausters, with 321 as an optional upgrade.

I don't know the metallurgy, but it is what we do.

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