API 510 Documentation and Records Management 5 — Questions and Answers
Question 1: What does a 'vessel history file' maintained per API 510 typically contain?
- MDR, all inspection reports, repair and alteration records, RV test records, current thickness data, and calculated inspection dates (Correct answer)
- Only the most recent inspection report
- Purchase order and invoice only
- Plant layout drawings only
Correct answer: MDR, all inspection reports, repair and alteration records, RV test records, current thickness data, and calculated inspection dates
A complete vessel history file consolidates all lifecycle records from manufacture through current operation to support informed inspection decisions.
Question 2: When a weld repair is made in a zone requiring impact testing (Charpy), what must the records include?
- Mill test reports or material certifications confirming impact test results at the required temperature and energy values (Correct answer)
- Visual weld inspection records only
- Welder's personal statement of material origin
- Heat input calculations only without material data
Correct answer: Mill test reports or material certifications confirming impact test results at the required temperature and energy values
Impact-tested zones require certified material test reports (CMTRs) proving the base and filler materials meet specified notch toughness requirements.
Question 3: What must an Authorized Inspector (AI) do before signing off on a repair or alteration record under API 510?
- Verify that all work was performed per the applicable code, inspect the completed work, and confirm all required documentation is complete (Correct answer)
- Review the contractor's invoice only
- Accept the owner-user's verbal confirmation without personal verification
- Sign the record immediately upon job completion without review
Correct answer: Verify that all work was performed per the applicable code, inspect the completed work, and confirm all required documentation is complete
The AI must personally verify code compliance, inspect the work, and confirm documentation completeness before signing — delegating this review is not permitted.
Question 4: Under API 510, what information must be recorded when calculating the next inspection due date?
- Long-term and short-term corrosion rates, current measured thickness, minimum required thickness, and the basis for the interval selected (Correct answer)
- Only the next calendar date without supporting data
- The inspector's scheduled vacation dates
- Only the vessel age
Correct answer: Long-term and short-term corrosion rates, current measured thickness, minimum required thickness, and the basis for the interval selected
The next inspection date calculation must be fully documented so any reviewer can independently verify the remaining life and interval selection.
Question 5: A pressure vessel is found to have a crack during internal inspection. What is the minimum documentation required before authorizing repair?
- Flaw characterization (size, location, orientation), root cause analysis or suspected cause, NDE reports, and engineering disposition (Correct answer)
- A photograph of the crack only
- The repair contractor's quote only
- The vessel operator's description of the crack verbally
Correct answer: Flaw characterization (size, location, orientation), root cause analysis or suspected cause, NDE reports, and engineering disposition
Cracks require full characterization through NDE, a technical disposition establishing fitness for repair, and documentation before any repair authorization.
Question 6: What is the correct API 510 approach when an inspection record shows a previous corrosion rate of 5 mpy but current measurements suggest 15 mpy?
- Use the higher short-term rate for remaining life calculation, document both rates, investigate the cause, and reduce the inspection interval accordingly (Correct answer)
- Average the two rates and use 10 mpy
- Use the lower historical rate since it is based on more data points
- Discard the current measurements as outliers without investigation
Correct answer: Use the higher short-term rate for remaining life calculation, document both rates, investigate the cause, and reduce the inspection interval accordingly
API 510 requires using the more conservative (higher) rate when rates change significantly, with documentation of the investigation and revised interval.
Question 7: What is the purpose of documenting the specific NDE method, coverage area, and acceptance criteria in an inspection record?
- To prove what was examined and confirm the basis on which the vessel was accepted, enabling future inspectors to assess whether the examination was adequate (Correct answer)
- To satisfy insurance billing requirements only
- To record the cost of the NDE contractor
- To provide marketing material for the NDE contractor
Correct answer: To prove what was examined and confirm the basis on which the vessel was accepted, enabling future inspectors to assess whether the examination was adequate
NDE documentation must show method, coverage, and criteria so the adequacy of examination can be evaluated by any future inspector or auditor.
API 510 Documentation and Records Management 5
What does a 'vessel history file' maintained per API 510 typically contain?