API 510 Documentation 2 — Questions and Answers
Question 1: According to API 510, what information must be recorded when a thickness measurement location (TML) is established?
- Only the measured thickness value
- The location, measured thickness, and date of measurement (Correct answer)
- The inspector's name and certification number only
- The fluid service and operating temperature only
Correct answer: The location, measured thickness, and date of measurement
API 510 requires that TML records include the location description, measured thickness, and date so future inspections can track corrosion rates accurately.
Question 2: Which document serves as the primary record for tracking all inspection activities and findings on a pressure vessel?
- The vessel nameplate
- The equipment inspection history file (Correct answer)
- The process flow diagram
- The plant safety manual
Correct answer: The equipment inspection history file
The equipment inspection history file (or inspection record) is the primary document in API 510 for tracking inspection activities, findings, and repairs.
Question 3: When a fitness-for-service (FFS) assessment is performed on a vessel, what must be documented according to API 510?
- Only the final accept/reject decision
- The assessment methodology, inputs, assumptions, and conclusions (Correct answer)
- The name of the software used only
- The cost of the assessment
Correct answer: The assessment methodology, inputs, assumptions, and conclusions
API 510 requires full documentation of the FFS assessment including the methodology, all inputs, assumptions, and final conclusions so the assessment can be reviewed and repeated.
Question 4: Under API 510, how long must inspection records for a pressure vessel be retained?
- 5 years after the last inspection
- The life of the equipment or as required by jurisdiction (Correct answer)
- 10 years minimum regardless of vessel status
- Until the next scheduled turnaround
Correct answer: The life of the equipment or as required by jurisdiction
API 510 requires inspection records to be retained for the life of the equipment, and jurisdictional requirements may impose additional retention obligations.
Question 5: What must be documented in an API 510 inspection plan regarding corrosion allowance?
- Only the original corrosion allowance from the nameplate
- The remaining corrosion allowance and basis for future inspection intervals (Correct answer)
- The corrosion allowance used by the original designer
- No corrosion allowance documentation is required in the plan
Correct answer: The remaining corrosion allowance and basis for future inspection intervals
The inspection plan must document the remaining corrosion allowance and use it as a basis for calculating and justifying future inspection intervals.
Question 6: Which of the following must be included in the documentation when an alteration is made to a pressure vessel per API 510?
- Only the contractor's invoice
- A description of the alteration, design calculations, and post-alteration inspection results (Correct answer)
- The vessel's original purchase order
- The plant manager's verbal authorization
Correct answer: A description of the alteration, design calculations, and post-alteration inspection results
Alteration documentation must include a description of the work, supporting design calculations, and results of post-alteration inspection to verify code compliance.
Question 7: In API 510 documentation, what is the purpose of recording the 'calculated remaining life' of a vessel?
- To satisfy insurance premium calculations
- To establish the basis for the maximum allowable inspection interval (Correct answer)
- To determine annual maintenance budgets
- To report to the original equipment manufacturer
Correct answer: To establish the basis for the maximum allowable inspection interval
The calculated remaining life, based on corrosion rate and minimum thickness, establishes the maximum allowable inspection interval per API 510.
API 510 Documentation 2
According to API 510, what information must be recorded when a thickness measurement location (TML) is established?