Which option represents the preferred inspection method for injection points?

Which option represents the preferred inspection method for injection points?

• A. RT only
• B. UT only
• C. RT and/or UT
• D. Visual

Answer: (C)

Injection points are welds and attachments where internal flaws can hide beneath coatings and contours. Visual inspection alone can only see surface conditions and cannot reveal hidden cracks, inclusions, or thinning in the weld or heat‑affected zones around these joints. Radiographic testing (RT) provides a picture of the weld’s interior, helping detect hidden discontinuities, while ultrasonic testing (UT) can detect flaws and also measure remaining wall thickness without disassembly. Because the geometry and access at injection points can vary, the most flexible and effective approach is to use RT or UT—whichever is applicable—or both if needed. This is why the best choice is RT and/or UT, rather than relying on Visual alone or constraining to a single method.

Injection points are welds and attachments where internal flaws can hide beneath coatings and contours. Visual inspection alone can only see surface conditions and cannot reveal hidden cracks, inclusions, or thinning in the weld or heat‑affected zones around these joints. Radiographic testing (RT) provides a picture of the weld’s interior, helping detect hidden discontinuities, while ultrasonic testing (UT) can detect flaws and also measure remaining wall thickness without disassembly. Because the geometry and access at injection points can vary, the most flexible and effective approach is to use RT or UT—whichever is applicable—or both if needed. This is why the best choice is RT and/or UT, rather than relying on Visual alone or constraining to a single method.