API 510 Pressure Vessel Design & Inspection Codes 3

Question 1

According to API 510, which organization must approve a repair organization performing welded repairs on pressure vessels?

Accepted Answer

The National Board of Boiler and Pressure Vessel Inspectors or equivalent jurisdiction

Answer

Repair organizations must hold a valid National Board 'R' stamp or equivalent jurisdiction authorization to perform welded repairs on pressure vessels.

Question 2

Under API 510, when is a pressure vessel alteration different from a repair?

Accepted Answer

An alteration changes the design temperature, pressure, capacity, or configuration beyond original design

Answer

An alteration changes the vessel's design temperature, pressure, capacity, or configuration from the original design, which is more significant than a repair that restores original condition.

Question 3

What is the purpose of a hydrostatic leak test performed after a pressure vessel repair?

Accepted Answer

To confirm the integrity and tightness of the repair before returning to service

Answer

A hydrostatic test after repair verifies the structural integrity and tightness of the repair welds before the vessel returns to service.

Question 4

According to ASME Section VIII, the standard hydrostatic test pressure for a vessel is:

Accepted Answer

1.3 times the MAWP adjusted for allowable stress at test temperature

Answer

ASME VIII requires hydrostatic test pressure of 1.3 times the MAWP multiplied by the ratio of allowable stress at test temperature to allowable stress at design temperature.

Question 5

In API 510, who has the authority to approve an alteration to a pressure vessel?

Accepted Answer

An API 510 Authorized Pressure Vessel Inspector

Answer

An API 510 Authorized Pressure Vessel Inspector must review and approve all alterations to pressure vessels covered by the code.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Pressure Vessel Design & Inspection Codes 3