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Exam API-571 All Questions

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Exam API-571 topic 1 question 45 discussion

Actual exam question from API's API-571
Question #: 45
Topic #: 1
[All API-571 Questions]

Hydrogen blisters may form as surface bulges on the ID, the OD on within the wall thickness of a pipe or pressure vessel. Blistering occurs from hydrogen generated by ______, not hydrogen gas from the process stream.

  • A. H²S
  • B. Corrosion
  • C. Hydriding
  • D. Sulfur
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Suggested Answer: B 🗳️

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ahmadmm
1 year, 4 months ago
Blistering only results from hydrogen generated by corrosion, not from hydrogen gas in the process stream.
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