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Site Radiography

Although inherently safe and less problematic alternatives exist, radiography is still routinely prescribed for many industrial site applications - but its suitability as a viable site inspection method is increasingly under question because of the risk involved, the logistics it entails and the inevitable disruption it causes.

That's why, wherever possible, we use low emission (Saferad) radiography on our clients sites.

The system uses localised shielding to minimize stray radiation emissions with levels further reduced by means of collimating energy from less powerful isotopes - up to 70 Curries.

This means that much smaller safe working areas can be defined and disruption of other work is kept to an absolute minimum - of particular importance in shutdown or construction situations where personnel are involved with other time essential activities.

Logistics are also simplified because necessary permits for transportation, storage and use of lower energy sources are less complex and onerous.

Although the effective range of this approach is limited (to <70mm of steel), it covers most industrial pipe wall thicknesses without any reduction in quality or performance.

The benefits are -

• Non-invasive through wall imaging
• Can be used through insulation
• Suitable for corrosion, weld root erosion & weld inspection
• Effective up to 70mm WT
• Low emissions mean reduced control area & no personnel evacuation
• Close proximity nucleonic (monitors & controls)
• Additional safety features include source position indication and secure attachment
• Capable of performing all RT techniques, i.e. directional, panoramic & projection @ up to 70 Curies
• Ideally suited to tubular components
• Conventional RT image hard evidence of results
• No contact or surface preparation needed
• Sensitivity, time, cost are thickness dependent
• Resolves internal & external defects

For further information on Saferad testing services, contact Colin Mortimer