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Weld mapping is the process of assigning information to a weld repair or joint to enable easy identification of weld processes, production (welders, their qualifications, date welded), quality (visual inspection, NDT, standards and specifications) and traceability (tracking weld joints and welded castings, the origin of weld materials).
Radiography uses an X-ray tube or radioactive source to give an image of the weld. Its use is similar to metal welds and provides a volumetric inspection which can show defects in the weld not visible from the surface. For plastics, a lower radiation intensity is typically required than that for metal welds, due to the lower material density. [1]
Visual inspection is a common method of quality control, data acquisition, and data analysis.Visual Inspection, used in maintenance of facilities, mean inspection of equipment and structures using either or all of raw human senses such as vision, hearing, touch and smell and/or any non-specialized inspection equipment.
In the case of high stress or safety critical welds, weld monitoring will be employed to confirm the specified welding parameters (arc current, arc voltage, travel speed, heat input etc.) are being adhered to those stated in the welding procedure. This verifies the weld as correct to procedure prior to nondestructive evaluation and metallurgy ...
Visual inspection testing can only be used to detect flaws on the surface of the weld but is the least expensive method of NDT. [1] This method of inspection may be performed both during and post welding. During welding the operator is inspecting for discoloration, misalignment, notches and other surface discontinuities.
Pulse IRNDT analysis can be successfully used for weld inspection in many cases. The images show an example of plastic parts inspection with a defective weld and with a correct weld. The gaps in the defective weld and the correct uninterrupted weld line are both well visible in the results of the IRNDT flash-pulse analysis.
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PCN Level 3 Weld Inspection with radiographic interpretation; The Welding Institute (TWI) in the United Kingdom offers the following certification scheme: [16] CSWIP 3.0 (Level 1): Visual Welding Inspector; CSWIP 3.1 (Level 2): Welding Inspector; CSWIP 3.2 (Level 3): Senior Welding Inspector; with or without radiographic interpretation (3.2.1 ...