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Studies Of High Temperature Hydrogen Related Damage In Welded Carbon Steel Components Used In Refineries, Maneel Bharadwaj
Studies Of High Temperature Hydrogen Related Damage In Welded Carbon Steel Components Used In Refineries, Maneel Bharadwaj
Masters Theses
Five materials encompassing various grades of carbon steel were received from retired and ex-service petroleum refinery equipment for root-cause evaluation of High Temperature Hydrogen Attack (HTHA) damage at UTK. These materials were submitted by three contributors: Irving Oil Refinery (IOR #1110-2), Valero (#67 & #1252134), and Phillips 66 (#555-S1 & #555-S2) on behalf of American Petroleum Institute (API). These materials originated from various flange-to-pipe welded components that were exposed in hydrogen pressure environment at elevated temperatures (> 640°F and >70 psia).
A singular crack originating at the flange inside surface just outside of the visible HAZ was observed in IOR …