API 510 Repair, Alteration & Rerating Procedures 2

Question 1

According to API 510, who is responsible for ensuring that repair work on a pressure vessel meets the code requirements?

Accepted Answer

The pressure vessel owner/operator

Answer

The repair organization

Answer

The jurisdictional authority

Answer

The original equipment manufacturer

Question 2

When a fillet weld repair is made to a pressure vessel shell, the minimum preheat temperature is generally determined by:

Accepted Answer

The applicable welding code and material P-number

Answer

The repair organization's standard procedure

Answer

The original design pressure of the vessel

Answer

The jurisdiction's blanket requirement

Question 3

Under API 510, a 'major repair' to a pressure vessel typically requires:

Accepted Answer

Prior approval and an authorized inspection before welding begins

Answer

Only a post-repair hydrostatic test

Answer

Notification to the jurisdiction within 30 days after completion

Answer

A written waiver from the original manufacturer

Question 4

A pressure vessel is to be rerated to a higher MAWP. Which condition MUST be satisfied?

Accepted Answer

The vessel must be suitable for the new conditions based on current inspection data and calculations

Answer

The vessel must be less than 10 years old

Answer

All welds must be radiographed regardless of original construction

Answer

The rerating must be approved by the original code committee

Question 5

API 510 requires that alteration work on a pressure vessel be performed using which edition of the construction code?

Accepted Answer

The latest edition of the applicable code or the original edition

Answer

The edition in effect at the time of original construction

Answer

Any edition selected by the repair organization

Answer

The edition specified by the jurisdictional authority only

Question 6

After completing a repair involving welding on a pressure vessel, an 'R' stamp holder must:

Accepted Answer

Provide a written report to the National Board and owner/operator

Answer

Conduct a metallurgical analysis of the weld

Answer

Repaint the nameplate with the new repair date

Answer

Submit radiographs to ASME for review

Question 7

When installing a flush-type repair patch on a vessel shell, the patch corners should be:

Accepted Answer

Rounded with a minimum radius to reduce stress concentration

Answer

Cut at 90-degree angles for maximum strength

Answer

Beveled to a knife edge for full fusion

Answer

Left square if the patch thickness is less than 0.5 inches