IQI Selection & Radiographic Sensitivity Flashcards

What does IQI stand for in radiographic testing?

Answer: Image Quality Indicator

IQI stands for Image Quality Indicator, a device placed on the test object to verify the quality and sensitivity of the radiographic technique.

Which ASTM standard specifically covers hole-type (plaque) IQIs used in industrial radiography?

Answer: ASTM E1025

ASTM E1025 covers the design, manufacture, and material groups for hole-type (plaque) IQIs used in radiographic examination.

On a hole-type IQI, what is the diameter of the 2T hole relative to the IQI thickness?

Answer: Equal to twice the IQI thickness

The 2T hole has a diameter equal to twice the nominal thickness of the IQI, establishing a standardized reference for sensitivity measurement.

For single-wall radiography, hole-type IQI selection is based on which thickness measurement?

Answer: Nominal single-wall thickness being radiographed

IQI designation is selected from code tables based on the nominal single-wall thickness being radiographed, not including weld reinforcement.

What does a radiographic sensitivity designation of '2-2T' indicate?

Answer: The 2T essential hole in the IQI designated for that thickness range is visible

The '2-2T' designation means the IQI number 2 (appropriate for the material thickness) and its 2T hole are both clearly visible on the radiograph.

Which ASTM standard covers wire-type IQIs used in radiographic testing?

Answer: ASTM E747

ASTM E747 covers wire-type IQIs, defining wire diameters, materials, and sets for use in industrial radiographic examination.

On which side of the test object should the IQI preferably be placed according to most radiographic codes?

Answer: Source side of the object being radiographed

Source-side IQI placement is preferred because it subjects the IQI to the greatest geometric unsharpness, providing a conservative verification of technique sensitivity.