PEI (Poly Ether Imide) resistance to H2S

[amvs]

Hi, I'm looking to use a solenoid valve body in a sour natural gas application where H2S will be present. I can't find any published chemical compatability data for PEI in the presensce of H2S although it is classified as 1A for 50% sulphuric acid (there will be moisture present). I have also seen that PEEK is classified as "excellent" for resistance to H2S and believe that the two materials (PEEK and PEI) are similar?

does anyone on here have any experiance or knowledge of the chemical resistance of PEI in such environments? or can anyone point me in the right direction to find out?

 

[Compositepro]

Imides should work fine in acidic environments but they are attacked in caustic environments.

 

[patprimmer]

If you enquire directly, Sabic technical support should be able to give a definitive answer, but good to H2S should equate to good to H2SO4

Regards
Pat
See FAQ731-376 for tips on use of eng-tips by professional engineers &

http://eng-tips.com/market.cfm

for site rules