Non destructive testing, reinvented.

Testing doesn’t have to be destructive or disruptive.
GGS has a better solution.

A Customer's Perspective

Age Before Beauty, but Data Before Age

I’ve been a mechanical contractor for 30 years, but seldom have I encountered a situation like the one…
Non Destructive Testing

Radiometric Profiling vs Industrial Radiography

Non destructive testing method performance review. A comparison between RP and RT for ammonia refrigeration piping.
Non Destructive Testing

Radiometric Profiling vs Ultrasonic Thickness Testing

Non destructive testing method performance review. A comparison between RP and UTT for ammonia refrigeration piping.
Early Detection

The Importance of Regularly Scheduled System Evaluations

Mechanical integrity and risk avoidance requirements include regular evaluations to be completed on systems to remain in compliance.…

Intelligent NDT

GGS applies the most efficient, accurate non-destructive testing methods to evaluate industrial piping systems. You will benefit from results that help you best meet today’s compliance requirements, mitigate risk, maintain mechanical integrity and control costs.

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Test locations/day at your facility for optimal value and efficiency


Zero holes in your piping insulation preserves the thermal barrier


All piping, including nested and suspended, can be tested


Safe for your staff and system, there is no radiation exposure risk


Real-time testing results for on the spot alerts and reliable evaluation


Entire pipe circumference is measured, not a single spot or side

Thorough. Accurate. Safe.

NDT Testing


Every day, we are in the field helping companies discover the truth about the health of their piping systems. Engage an integrity-focused approach to non destructive testing that you can trust.

NDT Testing


Make informed decisions with conclusive information you can count on. Our thorough, actionable reporting supports mechanical integrity and strengthens your PSM and RMP programs.

NDT Testing


Benefit from 360° scanning that ensures comprehensive testing of your entire piping system. Gamma Graphics Services (GGS) uses technology that tests more locations in less time with no disruptions to your operations or system.

NDT Testing


Our testing programs mutually support system operators, facility and safety managers, contractors and consultants. We serve industries that depend on piping systems across the US and overseas including refrigeration, petrochem, marine and more.

pressure vessel testing

You can depend on GGS.

GGS is committed to active participation and support of associations dedicated to innovation, education and advocacy.

We are an Active Contractor Member of the supplier management platforms ISNetworld and Avetta.

Our satisfied customers include maintenance and PSM managers, technicians, engineers, contractors and consultants of food and beverage and cold storage facilities across the US and internationally.


Refrigerating Engineers & Technicians Association


International Institute of Ammonia Refrigeration


UW Madison Industrial Refrigeration Consortium


International Association of Refrigerated Warehouses, Core Partner of GCCA