Exam API-571 All QuestionsBrowse all questions from this exam
Question 73

________ and _______ damage develop without applied or residual stress so that PWHT will not prevent them from occurring.

    Correct Answer: D

    Blistering and Hydrogen Induced Cracking (HIC) damage develop without applied or residual stress. Post Weld Heat Treatment (PWHT) is not effective in preventing these forms of damage because they occur due to hydrogen not due to stress.

Discussion
ahmadmmOption: D

Blistering and HIC damage develop without applied or residual stress. PWHT will not prevent them from occurring.