When radiographing to the 2-2T quality level, what is the ASTM pentameter thickness for a 2.5 inch steel?

When determining the ASTM pentameter thickness for a specific steel thickness at the 2-2T quality level, it is essential to understand the relationship between the thickness of the material being radiographed and the associated penetrameter (or "pen" for short) thickness defined by the ASTM standards.

For steel of 2.5 inches thickness, the standard practice typically dictates a specific penetrameter thickness to ensure proper sensitivity and reliability of the radiographic examination. According to the standardized guidelines, the penetrameter thickness at the 2-2T quality level for a material thickness of 2.5 inches equates to 50 mils. This thickness is selected to provide a representative test to assess the quality of the radiographic image against the required sensitivity level, which is essential for detecting variations in density and any potential flaws in the steel.

In conclusion, selecting 50 mils as the ASTM pentameter thickness for a 2.5 inch steel is in accordance with established radiographic testing standards for achieving appropriate quality control and assurance during inspections.