Composition of catalytically compressed rich gas
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Please help analyze what components are present in the catalyzed enriched gas, and which of these components can cause stress corrosion cracking in austenitic stainless steel.
Hydrogen sulfide and amines are the main stress corrosion agents
Catalytic rich gas is primarily composed of C1/C2/C3/C4 compounds along with small amounts of C5. However, the substances that cause stress corrosion in austenitic stainless steel are mainly aqueous solutions of chlorides and sulfides.
I agree with the opinion from the 3rd floor; stress corrosion occurred at the weld of the tower top safety valve connection in my original installation
As a supplementary point, H2 is also present in the catalytic rich gas, accounting for a high proportion in the dry gas sample. Austenitic stainless steels are prone to stress corrosion in corrosive media containing chloride ions. http://bbs.hcbbs.com/thread-134775-1-1.html This post was last edited by lince2007 on 2008-1-6 20:36 ]
Hydrogen sulfide, hydrogen. Aqueous solutions of amines and salts.
H2 15.34 Typical analysis data for rich gas composition: N2 17.02, CH4 5.83, CO2 5.04, C2= 3.21, C20 2.92, C3+ 49.35, H2S 1.29; Total 100.00