Test And Analysis On Stress Corrosion Cracking Damage Of Hydrogenation Reactor Material

Hydrogenater is the key equipment for modern oil refining industry,which mainly used in petroleum refining or heavy oil hydrocracking, hydrotreating and catalytic reforming, desulfurization, removal of heavy metals and other processes. Hot-wall hydrogenation reactor using 2.25Cr-1Mo-0.25V steel operating temperature is normally above 400℃, working pressure is about 20MPa.Media contact is the oil and gas, hydrogen, hydrogen sulfide and other corrosive media.Deterioration of oil quality and large-scale hydrogenation reactor, making the material damage of hot-wall hydrogenation reactor using 2.25Cr-1Mo-0.25V steel in the process of long-term service, especially in the repeated opening and lay-off is very prominent.The stress corrosion cracking in wet hydrogen sulfide service is increasing. In view of the impact of hydrogenation reactor safety is a prominent issue, depth study of the sensitivity of2.25Cr-1Mo-0.25V steel in wet hydrogen sulfide service, safety assessment and Yeonsu ways to improve the operation of our hydrogenation reactor safety and reliability to ensure that the social production of security and safety of the people is significant.In this regard, this paper through the slow strain rate experiments, simulation the actual working condition of hydrogenation reactor, determined 2.25 Cr-1Mo-0.25V steel corrodes sensibility and sensibility with the relation between hydrogen sulfide thickness , the temperature , PH value. Through Wedge-shaped opening the pre-loaded stress corrosion crack test specimen determined stress corrosion threshold stress intensity factor and stress corrosion crack growth rate, have reference value to safety assessment and residual life prediction of hot-wall hydrogenation reactor using 2.25Cr-1Mo-0.25V steel.