How much weld should each radiograph show?

How much weld should each radiograph show?

• A. 60 mm (2.4 in)
• B. 50 mm
• C. 100 mm (4 in) each spot
• D. 200 mm

Answer: (C)

In radiographic welding inspection, each exposure is meant to capture a defined length of the weld so flaws can be seen across that segment. The standard here specifies that each radiograph should show about 100 mm (4 inches) of weld. This length is chosen because it provides a representative portion of the weld for flaw detection while keeping image quality practical for the film or detector being used and for the exposure setup. If the radiograph covered only a shorter length, you’d need more exposures to inspect the entire weld, increasing time and the chance of missing defects between spots. If you tried to cover a much longer length in one shot, image sharpness and detail can suffer, and you’d risk overexposure or wasted film/detector area. So, showing 100 mm per spot is the best balance for effective inspection coverage.

In radiographic welding inspection, each exposure is meant to capture a defined length of the weld so flaws can be seen across that segment. The standard here specifies that each radiograph should show about 100 mm (4 inches) of weld. This length is chosen because it provides a representative portion of the weld for flaw detection while keeping image quality practical for the film or detector being used and for the exposure setup. If the radiograph covered only a shorter length, you’d need more exposures to inspect the entire weld, increasing time and the chance of missing defects between spots. If you tried to cover a much longer length in one shot, image sharpness and detail can suffer, and you’d risk overexposure or wasted film/detector area. So, showing 100 mm per spot is the best balance for effective inspection coverage.