Valves in Amine Unit
Valves in Amine Unit
(OP)
Experts,
What is the best material to select for valves in a CO2 Capture Amine Unit (H2S free) especially for rich and lean amine services ?
Regards,
What is the best material to select for valves in a CO2 Capture Amine Unit (H2S free) especially for rich and lean amine services ?
Regards,





RE: Valves in Amine Unit
I work with valves in exotic alloys at alloy-valves.com. This is me on Twitter and LinkedIn. Let's connect!
RE: Valves in Amine Unit
In addition: Are you also asking for sealing material? In any case, deatails as hsbcn is aking for, must be given.
Temperature ia also important, especilly if exposed below zero. If inner metal parts are wetted, it could be wise to 'upgrade' the material of the inner parts (trim) of the valve if body is selected from the 'cheaper' end of the material scale.
Seen from European side the 1,4571/SS316Ti could be a good choice. (To be checked against your details!)
RE: Valves in Amine Unit
We are working on the material selection of a CO2 capture Amine unit.( Feed gas content: 76 % hydrogen and 16 % CO2 free from H2S and chlorides).
Max temperature of rich amine is 119°C and rich Amine is 106°C.
Amine used: 40 wt% MDEA, 5 wt% DEDA, and 55 wt% water.
We are selecting materials for control valves. I decided to select SS grade 304 for valves as there is no need to upgrade to duplex SS as there is no risk of SSC but I may consider 316 for more security.
I would be grateful if you can give me more advices
RE: Valves in Amine Unit
RE: Valves in Amine Unit
Warning 1: I have no practical experience for your application, but for fluids exactly as described you seem to be backed up by material selection tables in my library. PTFE sealings? Warning 2: In my practical experience 'fluids free of something' can be read as 'sometimes surprisingly also containing....!
RE: Valves in Amine Unit
RE: Valves in Amine Unit