Visual Testing VT

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Visual Inspection of Welds and Materials – Non-Destructive Testing Method

The quality of materials and welded joints can often be assessed with the naked eye. Professionals can detect differences, which helps in identifying discrepancies. Visual testing (VT) is a type of non-destructive testing method used to assess the quality of welded joints. It is employed to identify surface-level discontinuities that are visible to the naked eye.

Professional visual inspection is a very commonly used method for surface evaluation of various materials and products. Specialists conducting non-destructive VT testing are hired by contractors to assess the quality of materials. Clients who want to confirm the quality of welded joints also make use of their expertise. Visual inspection of welded joints is particularly common in hard-to-reach areas. Furthermore, this testing method can determine the condition of materials after an accident, failure, or even assess the level of wear and tear.

If you find yourself in one of these situations and need to commission a professional visual VT inspection, take advantage of the offer from Technic-Control Non-Destructive Testing Laboratory. We are a company with many years of experience, and our inspectors have had the opportunity to work on the largest industrial facilities. Choose professionalism and gain quality confirmed by expert visual VT inspections.

Key Features and Methods of Conducting VT Inspections

Visual testing (VT) is the most commonly chosen method for quality control of materials and products under inspection. When multiple tests are required, the visual method is typically conducted first. Among the advantages of VT visual inspection, its non-invasive nature stands out.

There are several methods for visual inspection of welded joints. The most basic method is known as “naked-eye inspection.” Experts assess the quality of welded joints, focusing on the presence of discontinuities. To perform a visual inspection of the weld, it is necessary to clean the surface of any spatter from welding. The surface should not be painted, and access to the weld must be ensured. The inspection is effective if the distance between the inspector’s eyes and the examined element is no less than 60 cm.

The second type of inspection is endoscopic visual testing (VT) of welded joints. This technique was introduced in the 19th century for inspecting the interiors of pipes and similar spaces. Initially, tubes with a system of mirrors were used, inserted inside the object. Today, the mirrors are replaced by professional endoscopes that use fiber optics to transmit images. Endoscopic visual inspections allow for the assessment of the root of the weld, as well as the quality of pipes and conduits. This method also enables the inspection of machines and equipment without the need for disassembly. It is also recommended for conducting inspections in areas that are hard to access.

What Can Be Inspected Using Visual Testing?

Visual testing allows for the detection of most irregularities in welds and the evaluation of material quality. Primarily, this method can identify various types of discrepancies in welded joints. If the assembly is conducted improperly or not in accordance with the documentation, visual testing will also detect this. Furthermore, visual VT testing of welded joints can reveal defects such as cracks, undercuts, and visible porosity.

Visual VT testing is also used to detect irregularities that arise during the operation of an element. An endoscope can show areas affected by corrosion, cracks, blockages, and other changes that could be hazardous to the component in use.

Visual Testing at Technic-Control Non-Destructive Testing Laboratory – Trust the Experts

Professional visual testing should not be entrusted to random companies or individuals. The consequences of improperly conducted testing can be severe, which is why the inspection must be carried out by specialists trained in this field.

At Technic-Control Non-Destructive Testing Laboratory, we employ certified inspectors who are qualified to conduct visual VT testing. The PN-EN ISO 9712 standard for visual VT testing specifies all the requirements that personnel assessing the materials must meet. Our team at Technic-Control has qualifications that far exceed the standard, and they undergo regular vision tests.

Entrusting your quality control to Technic-Control Non-Destructive Testing Laboratory guarantees reliability and thoroughness. All visual VT inspections of welded joints are conducted with great diligence. Our inspectors’ experience is invaluable when evaluating joints with the naked eye. For inspections inside pipelines and chambers, we use endoscopes equipped with fiber optic technology of the highest quality. After the inspection, we issue reports that confirm the inspection results, indicate any deviations from the standards, and provide recommendations.

If you want to commission visual VT testing at Technic-Control Non-Destructive Testing Laboratory, feel free to contact us. Our inspectors will arrive promptly at your location. We serve industrial plants, as well as the energy, mining, and shipbuilding industries. We also perform testing for smaller construction and manufacturing companies. If you’re unsure whether a particular testing method is suitable for your welded joint, we will assist you in resolving the issue even during a phone consultation. Technic-Control Non-Destructive Testing Laboratory offers proven quality in testing services. Call our customer service office today to schedule a visual VT inspection of welded joints.

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