Material for high temperature service in SO2 gas
Material for high temperature service in SO2 gas
(OP)
Hi:
I need some help to choice a better resistant material for a butterfly valve that is a bypass valve for recovery boiler ( gas side) in the sufuric acid production, these are the conditios:
Combustion gas with 12% SO2( 79% nitrogen ,9% oxigen) at 1120°C (From the suphur burn) , 31 f/s(average) , in a duck work , 34in of diameter.
The last material that we use was Haynes 556 , but had a catastrophic failure las february.
Now we use temporaly, SS 310S, but we want to choice hayness HR 160 or Supertherm( duraloy trademark) .
Can anybody help me to choice or suggest a better material?, Thanks.





RE: Material for high temperature service in SO2 gas
RE: Material for high temperature service in SO2 gas
One thought would be to use a 310 valve and have every surface coated (weld overlay or HVOF) with Ni-Cr. Without looking it up I recall that 50/50 gives good resistance
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm