NEW CONCEPT for visual inspection of welds

With VT® gauges, the visual inspection of the quality of weld seams has become child’s play. The quality control of welds is a visual inspection that can be performed on 100% of your weld seams very quickly, without tedious calculations, and with great precision. The visual inspection will comply with international and European standards such as ISO 5817, EN 1090-2, ISO 9601-1, … The quality control of welds is carried out with VT® gauges, an exclusivity.

Identify on this site the VT® gauge kit corresponding to the standard you need to apply for your welds. Order your VT® gauges online and download the welding inspection instructions in PDF format. You will then be ready to begin the visual inspection of your weld seams with ease.

compétences de l’examinateur des contrôles visuels

When should a visual inspection of the quality of welds be done?

As soon as a welding quality management system is required, 100% of welds must undergo a visual inspection, according to international standards.

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Who can perform the visual inspection of welds?

Generally in production, it is the welder who plays this role of examiner of the quality of welds according to a certain inspection standard.

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What are the types of welding imperfection  to be controlled?

It is the EN ISO 6520-1 standard that defines and classifies the quality defects of welds.

Learn more about ISO 6520-1

What are the acceptance criteria for welding defects?

It all depends on the quality standard to be implemented to control the welds.

View the standards

How to perform the visual inspection of weld seams?

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The disadvantages of traditional measurement tools

Traditional welding measurement tools require a five-step control.

View the 5 steps

Quality control of welds with VT® gauges

With VT® gauges, the quality control of welding seams is simplified to only 3 steps. Learn everything about VT® gauges.

Learn everything about VT® gauges

VT® gauges catalog

ISO 5817

To check welding imperfection  according to the welding quality standards
5817-B, 5817-C, 5817-D

View VT® gauges

EN 1090-2

To check the defects of your welds according to the welding quality standards
1090-2 EXC1, 1090-2 EXC2, 1090-2 EXC3, 1090-2 EXC4

View VT® gauges

ISO 9601-1

To check welding imperfection  according to the quality standards of weld seams
ISO 9606-1

View VT® gauges

Discover conventional measurement tools for weld seams

Find the accessories you need for quality control of welds

User testimonials

The VT® gauge principle is GO or NOGO. Measurements, calculations, and manipulation of standards are not involved.

Guy Lardinois SPRL Company

VT© gauges provide significant benefits for welders by reducing training needs. The approach is highly practical and easy to comprehend. The gauges offer excellent value-addition to welding processes. It is a precise and efficient solution.

There's no need to comply with elaborate standards or conduct complex calculations for visual weld quality control. For instance, for craters, visual inspection is now immediately possible without any calculations. The VT© gauge and a flashlight are all that is required to handle any welding situation. By saving an enormous amount of time and ensuring precision, VT© gauges provide a valuable addition to the welder's toolkit. Training requirements are minimized. The approach is highly pragmatic, and it is straightforward to determine the appropriate gauge with the help of available visual aids.  

10 / 10

Institut Belge de la Soudure (IBS)

The use of VT© gauges enables visual inspection by non-experts. They are suitable for all types of welding profiles and are cost-effective.

VT© gauges facilitate a visual inspection without requiring an engineering background or extensive consultation of data tables.   This allows for a visual inspection to be conducted in accordance with the welding standard without the need for advanced technical skills.This streamlined inspection process is quick and efficient, eliminating past difficulties with visual inspections. Now, anyone can perform a visual quality control of welds without requiring engineering expertise. It is accessible to individuals across all professions and at an affordable price point.

10 / 10


The new generation of VT© weld inspection gauges is very easy to use and highly accurate. Our trainees show great interest. We use ultra-modern, state-of-the-art equipment

Industry has a chronic shortage of boilermakers and pipe fitters. For boilermaking, the TechnoCampus assembly site is the only training operator to offer short or long courses for the entire Walloon Region. Each instructor at the assemblage site has his or her own complete VT Total kit. Instructors demonstrate the handling of the calibers to trainees and companies, both as part of our teaching and continuing training courses. We also organize information days with the guidance of the IBS (Belgian Welding Institute). We use gauges for all approvals. Thanks to the combination of the new generation VT© gauge and the ultra-simple instruction manual, our instructors can certify to EN 1090-2 very efficiently. The new generation VT© gauge for weld inspection is very easy to use and highly accurate. Our trainees show great interest. We use ultra-modern, state-of-the-art equipment, including welding simulators.

10 / 10