Preferred inspection method for injection points?

Preferred inspection method for injection points?

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

Answer: (C)

Injection points involve welded nozzles or tees where chemicals or fluids are introduced, so you need to verify the weld and surrounding material beyond what you can see on the surface. Visual inspection alone can miss internal flaws or thinning at the joint, which is why nondestructive testing that looks inside and measures wall conditions is preferred. Radiographic testing is excellent for revealing internal weld defects such as porosity, cracks, or lack of fusion, while ultrasonic testing can measure wall thickness and detect hidden thinning or corrosion near the weld area. Depending on geometry, radiation safety, and access, either method can be used, or both may be applied to get a complete assessment. That flexibility is why the best choice emphasizes RT and/or UT rather than relying solely on visual inspection.

Injection points involve welded nozzles or tees where chemicals or fluids are introduced, so you need to verify the weld and surrounding material beyond what you can see on the surface. Visual inspection alone can miss internal flaws or thinning at the joint, which is why nondestructive testing that looks inside and measures wall conditions is preferred. Radiographic testing is excellent for revealing internal weld defects such as porosity, cracks, or lack of fusion, while ultrasonic testing can measure wall thickness and detect hidden thinning or corrosion near the weld area. Depending on geometry, radiation safety, and access, either method can be used, or both may be applied to get a complete assessment. That flexibility is why the best choice emphasizes RT and/or UT rather than relying solely on visual inspection.