Welcome to

Republic Testing Laboratories, LLC

Republic Testing Laboratories, LLC (RTL) is a diversified, full service metallurgical testing laboratory offering a wide range of testing services. Our capabilities include a broad range of mechanical testing, chemical analysis, metallurgical analysis, welder qualification testing, welding procedure development and qualification testing, consulting welder and welding procedure qualification test coupon sales.

With over 200 years of combined employee expertise RTL pledges to provide distinctive quality and unparalleled client service as we strive to gain the respect and trust of our clients by “Delivering Quality with Integrity”.

Our experienced and dedicated team of welding and metallurgical engineers are committed to providing a wide range of engineering and testing services. Our engineers are supported by experienced inspectors and lab technicians enabling us to provide expert service with flexible, around-the-clock testing and welding procedure development. RTL’s team recognizes the unique and critical needs of each and every client and is committed to delivering timely, trusted results that meet the stringent demands expected by the industries we service.

Republic Testing Laboratories, LLC appreciates your interest. We look forward to serving your testing and welding needs, as well as providing solutions to your unique industry challenges in a comprehensive, accurate, expedient and cost-effective manner.

Please check our individual services to see what we can do for you, or contact us for more information on these services you may need.

Welding Engineering

Welding Performance Qualification

Weld Coupon Sales


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I would like to thank Republic Testing for their great staff and all their help. Our company is up and growing with the addition of our new divisions.  Republic Testing has been nothing but supportive and accommodating to our crazy needs. Their staff has always been there from basic question answering to technical metallurgical client interactions. We look forward to future growth together.

Gary Moreno
Quality Director
Hi-Tech Industrial Services, LLC

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We use Republic Testing Labs for their expertise and knowledge in the industry for all of our Welder Performance, Welding Procedure, and Welding Technical Services. Providing fast and accurate service to meet our tight deadlines while providing personal service. We have had great success with them and the experienced staff are always willing to meet our customers’ challenges.

Buck Tingle
Quality Manager
Altair Strickland

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We prefer working with Republic Testing Labs because they always deliver and make things happen!

William F. Newell, Jr.
Vice President, Engineering
Euroweld, Ltd.

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I wanted to personally thank Republic for the time and effort that has been put into the testing of Zachry and JVIC welding procedure qualifications.  Your staff has been invaluable since the beginning.  Your quality performance with quick turnaround times and answering any and all of my questions has been outstanding. I look forward to our continued working relationship for years to come!

Jason D. Praster
Welding Engineer
Zachry Group

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