Suitability of materials of Air release valves for sulphuric acid

[supersv6]

Hi all,

i'm faced with a problem of finding a suitable air release valve for a chemical dosing line (sulphuric acid at 98% concentration). I have looked at SS 316 valves, PVDF valves and wondering if there is hastelloy valves as it is superior in chemical resistance to H2SO4 at 98%. Having said that, none of the valve vendors are interseted in offering a valve that is suitable.

Having a look on google, there arent much avilable either.

just wondering if anyone here have had experience with H2SO4 and air release valves?

 

[strider6]

i suggest the NACE Recommended Practice: 0391-2001
"Materials for the Handling and Storage of Commercial
Concentrated (90 to 100%) Sulfuric Acid at Ambient
Temperatures"

http://www.techstreet.com/cgi-bin/detail?doc_no=NACE|RP0391_91&product_id=12084

or you can find something at:

http://www.corrosionist.com/corrosion_protection_sulfuric_acid.htm

S

Corrosion & Rust Prevention Control