Material selection for hydrogenation air-cooled tubes
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There is a small project currently under way related to diesel hydrogenation, and I have two questions for experts. 1. For the high-pressure air cooling tubes in the cold high-pressure feed line, steel grade 10 resistant to hydrogen is being used. The temperature at this point is 120°C, the pressure is 80 MPa, and the hydrogen sulfide concentration is 1500 PPM (under normal operating conditions). Is this material selection appropriate? It is said that this type of material is used for diesel hydrogenation in local refineries in Shandong. Everyone, give some advice! 2. Is it appropriate to use 15CrMoR for the tube boxes, shell, etc. of high-pressure heat exchangers (threaded locking) in such an environment? This project really broadened my horizons! I’d like to hear some advice from experts!
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Incoloy 800 nickel-based alloy
The air coolers in the hydrogenation units designed in the past were made of carbon steel tubes, and using 825 would increase the cost. Carbon steel only needs to be replaced every few years