1. In the presence of free water and CO2 (above 6 mol%) in the raw gas please tell me the material selection criteria. Either we can use normalized carbon steel or we have to go for SS material due to the acidic attack of CO2 to the material . Please also tell me is there any option to go for simple carbon steel upto specific temp and pressure conditions in this acidic conditions.
2. If both H2S & CO2 present in the raw gas then please tell me the material selection criteria for this sour service nature. Please recommend the material in that condition where H2S lie in SSC (Sulphide stress cracking) region according to NACE MR0175.
For these two conditions please tell me what material should be used in regeneration section of Amine Unit (Where highly corrosive envoirment exists due to CO2 or H2S in presence of free water).
Please note that I am asking the material selection for gas sweetening and gas dehydration plants.
Your cooperation will be highly anticipated.
Edited by Nomi, 07 July 2010 - 06:25 AM.