
Great Lakes Testing, Inc.
Non-destructive testing for manufacturers, fabricators, and fire departments across Wisconsin and the Great Lakes region since 1993.
Welcome to Great Lakes Testing, Inc.
We are Great Lakes Testing, Inc. (GLT), and we strive to provide quality while performing Non-Destructive Testing. We perform Radiographic Testing (both traditional film and Computed Radiography), Visual Testing, Certified Weld Inspection, Magnetic Particle Testing, Dye Penetrant Testing, Ultrasonic Testing, Phased Array Ultrasonic Testing, Film Digitization, and we also have our Fire Division, in which we test both the ladders and aerials for fire departments. We perform services for pipelines, fabrication shops, foundries, military vehicles, and many more industries.
Our current certifications
- ISO 17025 Accreditation
- NQA1-1994 Compliant
- 10CFR Part 50 Appendix B
Our personnel are certified in accordance with
- NAS-410
- ASNT SNT-TC-1A Current Approved Edition
- ASNT CP-189 1995 Edition
- MIL-STD T9074-AS-GIB-010/271
Services

Magnetic Particle Inspection (MT)
A process for detecting surface and shallow subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys.

Industrial Radiography (RT)
Gamma rays penetrate solid material and generate an image on film (traditional) or phosphor plates (computed radiography) to view the internals and check the soundness of the material.

Dye Penetrant Inspection (PT)
Detects casting, forging and welding surface defects such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks on in-service components.

Certified Weld Inspection (CWI)
We have multiple CWIs to perform final weld checks, monitor welding processes, review documents and more.

Ultrasonic & Phased Array Testing (UT, PAUT)
High-frequency sound waves are transmitted into materials to detect internal flaws and characterize materials, including thickness testing.

Fire Division
We travel to fire departments to test ground ladders and aerials for structural integrity, mechanical function, and waterway performance.
Scheduling
We are a friendly group of knowledgeable and courteous people who coordinate and schedule your non-destructive testing needs.
Quality Control
We take quality very seriously, and are here to help you understand our quality control standards.
Personnel
Our personnel are highly trained and knowledgeable in our field.









