Tig Welding Certification – Variations within the Pipe Welding, Aerospace, and Aviation Industries
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2 industries that require tig welding certification are:
- Industrial piping, (together with boiler tubes)
- Aerospace and aviation (manufacture and overhaul/restore)
For tig welding certification in piping, strain vessels, and boilers, ASME part IX of the “Boiler and Strain Vessel Code” specifies the standards for acceptable welding exams.
For Aerospace tig welding, the American Welding Society (AWS) D17.1 – “Specification for Fusion welding for Aerospace Purposes” is the code for welding certification exams.
As a rule, a 6G place welding take a look at is required to certify for Pipe welding jobs. On many boiler jobs, 2″ heavy wall tubing is tig welded all the way in which out within the 6G place making the welder both swap palms, or at the least get in some uncomfortable positions. That’s the reason 6G place Tig welding exams are thought-about essentially the most tough.
More often than not, sheet steel take a look at items within the 0.020″-0.125″ thickness vary are used for aerospace welder qualification testing. The 6G welding take a look at is simply used sometimes as a result of it doesn’t precisely signify the scope of welding duties carried out for many aerospace and aviation welding purposes. AWS D17.1 even has a provision for welders to certify on a scrap half or mock up of a weld that isn’t represented nicely by a plain groove or fillet weld.
ASME part IX Boiler and Strain Vessel Code has been round for a really very long time, however AWS D17.1 is comparatively new and was written to interchange 2 previous Mil requirements… 1595a and 2219.
One factor each welding certification specs have in frequent is that the take a look at welds which are chosen for use for certification exams solely qualify the welder for a variety of positions, thicknesses, and joint sorts. No single take a look at qualifies for all of the attainable materials, thickness, positions, and joint sorts which are attainable. That’s the reason some welders maintain a dozen or extra certifications.
One important distinction in welding exams for these 2 industries is that the preliminary welding take a look at for Pipe welding jobs are largely finished utilizing low carbon metal or chrome steel. Different supplies like inconel are generally used additionally however not practically as a lot as carbon metal and stainless.
Within the Aerospace and aviation industries, It’s not unusual for a welder to be examined on carbon or low alloy steels, stainless steels, nickel alloys, aluminum, magnesium, titanium, cobalt alloys, and even some refractory alloys like Niobium…with separate welding exams required for every materials class.
One of many important variations in Tig welding pipe and tig welding plane or aerospace components is within the thickness of fabric. In Plane welding , most every little thing is thinner. and meaning smaller electrodes, smaller filler wire, smaller torches…and in Plane and Aviation tig welding, a 1/16″ rod is taken into account fairly huge.
