“Acoustic emission testing is not currently a proven or reliable method for identifying HTHA in refinery components.”
“HTHA typically occurs internally, not as surface blisters, and is not limited to welds. Austenitic (300 series) stainless steels are generally resistant at normal refinery conditions.”
(Reference: API RP 571, Section 4.2.1.3 – High Temperature Hydrogen Attack)
Thus, option A is the most accurate statement.
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit