In Melbourne, as well as elsewhere in Australia, examination & qualification of welding inspection personnel is regulated by the Welding Technology Institute of Australia (WTIA). When a weld inspector becomes certified, it implies that he or she possesses a wealth of knowledge on various aspects, including:
- Welding codes as well as contract requisites
- Metallurgy, that is, corrosion resistance, ductility, strength, fatigue life, etc.
- Fundamentals of cutting, welding and joining processes & equipment
- Weld defects, reasons and remedies
- Procedure as well as performance qualification testing
- Test documentation such as WPQs, PQRs, etc.
- Fundamentals of NDT (non destructive testing) methods like ultrasonic testing, radiography, dye penetrant testing, eddy current, magnetic particle, and so on
- Pertinent drawings and symbols
Besides that, a certified individual also has the obvious ability of performing visual inspection.
If you are a newbie in the manufacturing industry and wondering why you need to hire a certified welding inspector, bear in mind that such a professional generally has a lot of experience in addition to weld-related knowledge. He or she can ensure that every phase of any project is conducted as per applicable specifications and codes.
Welding has a wide range of variables that consist of – arc current & voltage, travel speed, polarity, wire feed speed, joint geometry, base metal chemistry, position, filler metal chemistry, tensile strength, fracture toughness, hardness, ductility – and a neverending list. With the presence of all these interdependent variables, having a scientific quality control for welding is absolutely vital. And that is where the certified inspectors come in. A program proceeded with under the guidance of a licensed expert would ensure code compliance and systemic regulation of variables. Moreover, it is a very prudent business move to control the quality of manufacturing processes.
Throughout Australia, a number of high-profile industries, including those of the Aerospace, Oil & Gas, Defense, Energy, Transportation and Construction, necessitate certified inspectors. This is because stakes are generally high in such industries and aftermath of even a single failure can spell catastrophe. Presence of a certified welding inspector on site not only ensures compliance with code requirements, but also prevent weld failures.
Prior to the commencement of production welding processes, it is absolutely imperative to engage a certified welding inspector in advance. The professional would be entrusted with a number of responsibilities, including testing activities, setup before production, and so on. These kind of activities usually take some weeks for completing, and should be reviewed & approved before initiation of client’s production procedures.