API 571 Inspection and Mitigation Techniques

Question 1

Which NDE method is most effective for detecting surface-breaking cracks in ferromagnetic materials?

Accepted Answer

Magnetic particle testing (MT)

Answer

Ultrasonic testing (UT)

Answer

Radiographic testing (RT)

Answer

Eddy current testing (ET)

Question 2

Radiographic testing (RT) is most effective for detecting which category of flaws?

Accepted Answer

Volumetric flaws such as porosity, inclusions, and lack of fusion

Answer

Surface-breaking stress corrosion cracks

Answer

Thin surface oxide coatings

Answer

Near-surface SCC with tight crack faces

Question 3

What is the primary advantage of Pulsed Eddy Current (PEC) inspection for CUI assessment?

Accepted Answer

Measuring average wall thickness through insulation without removing it

Answer

Detecting surface cracks in stainless steel with high sensitivity

Answer

Detecting HTHA internal damage and fissuring

Answer

Measuring weld hardness in carbon steel

Question 4

API 510 sets maximum inspection intervals for pressure vessels based primarily on which calculation?

Accepted Answer

Remaining corrosion allowance divided by measured corrosion rate (remaining life)

Answer

Equipment age and original installation date

Answer

Operating pressure relative to design MAWP

Answer

Material grade and original code of construction

Question 5

Fitness-for-service (FFS) assessments for equipment containing flaws are governed by which standard?

Accepted Answer

API 579-1/ASME FFS-1

Answer

API 510 — Pressure Vessel Inspection Code

Answer

API 571 — Damage Mechanisms for Refining Industry

Answer

NACE MR0175/ISO 15156

Question 6

Corrosion coupons provide what type of corrosion rate information?

Accepted Answer

An integrated average corrosion rate over the coupon exposure period

Answer

Instantaneous real-time corrosion rate at any given moment

Answer

Localized pitting depth and pitting factor data

Answer

Stress corrosion susceptibility of the material in service