Repair, Alteration & Rerating Procedures Flashcards
7 cards from real API 510 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Repair, Alteration & Rerating Procedures flashcards as text
According to API 510, who is responsible for ensuring that repair work on a pressure vessel meets the code requirements?
Answer: The pressure vessel owner/operator
The owner/operator bears final responsibility for ensuring that all repair work complies with applicable code requirements.
When a fillet weld repair is made to a pressure vessel shell, the minimum preheat temperature is generally determined by:
Answer: The applicable welding code and material P-number
Preheat requirements are governed by the applicable welding code (such as ASME Section IX) based on the base metal's P-number and thickness.
Under API 510, a 'major repair' to a pressure vessel typically requires:
Answer: Prior approval and an authorized inspection before welding begins
Major repairs require prior approval from the inspector and often the jurisdiction, with the authorized inspector involved before and during welding.
A pressure vessel is to be rerated to a higher MAWP. Which condition MUST be satisfied?
Answer: The vessel must be suitable for the new conditions based on current inspection data and calculations
Rerating to higher pressure requires engineering calculations and current inspection data confirming the vessel's fitness for the new service conditions.
API 510 requires that alteration work on a pressure vessel be performed using which edition of the construction code?
Answer: The latest edition of the applicable code or the original edition
Alterations may be performed to the original code of construction or the latest applicable edition, per owner/operator and inspector agreement.
After completing a repair involving welding on a pressure vessel, an 'R' stamp holder must:
Answer: Provide a written report to the National Board and owner/operator
The R-stamp holder must submit a completed National Board Form R-1 (Report of Repair) to the owner/operator and jurisdictional authority.
When installing a flush-type repair patch on a vessel shell, the patch corners should be:
Answer: Rounded with a minimum radius to reduce stress concentration
Flush patch corners must be rounded with a minimum radius (typically ≥ 1 inch per NBIC) to minimize stress concentrations at the corners.