API 510 Repair and Alteration Standards 5

Question 1

Which ASME code section provides the rules used by the National Board 'R' stamp repair organization when repairing a pressure vessel?

Accepted Answer

ASME Section VIII, Division 1 or 2 (original construction code)

Answer

Repairs must conform to the rules of the original construction code (typically ASME Section VIII Div. 1 or 2), as referenced by the NBIC.

Question 2

Weld procedure qualification for pressure vessel repair requires the welding procedure specification (WPS) to be supported by:

Accepted Answer

Procedure Qualification Records (PQRs) demonstrating mechanical test results

Answer

A WPS must be supported by PQRs that document mechanical test results proving the procedure produces welds meeting code requirements.

Question 3

What is the key engineering difference between a 'repair' and an 'alteration' of a pressure vessel under API 510?

Accepted Answer

A repair restores original design conditions; an alteration changes the vessel from its original design intent

Answer

A repair returns the vessel to a safe operating condition within its original design parameters, while an alteration changes the design basis, rating, or configuration.

Question 4

A vessel owner wants to install an additional nozzle on an existing pressure vessel. This activity is classified as a(n):

Accepted Answer

Alteration, requiring engineering design, documentation, and jurisdiction notification

Answer

Adding a nozzle changes the vessel from its original construction and is classified as an alteration under API 510 and the NBIC.

Question 5

When establishing a weld repair procedure for a P-No. 4 (Cr-Mo) steel vessel, a critical requirement is:

Accepted Answer

Preheat and PWHT per the applicable code to prevent reheat cracking and restore toughness

Answer

P-No. 4 Cr-Mo steels require carefully controlled preheat, interpass temperature, and PWHT to prevent HAZ cracking and restore creep properties.

(API 510) Certified Pressure Vessel Inspector Practice Test

(API 510) Certified Pressure Vessel Inspector Practice Test

API 510 Repair and Alteration Standards 5