Limitations and advantages of radiographic testing

Limitations

Equipment can be bulky and heavy

Radiation hazards

Testing area needs to be controlled access

Access may be required to both sides of object

May not detect critical flaws

Results require interpreting by experienced person

Gamma results inferior to X-ray results

Gamma less sensitive than X-ray,especially on thin materials

Not suitable for certain configurations, e.g.tee joint

Advantages

Volumetric inspection

Can detect surface and subsurface flaws

Permanent records

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