TIG welding requires considerable knowledge of the metals you’re welding and how to join each type, the tools you’ll be working with and the techniques used to produce solid, clean welds.To pass your test and interview, you’re going to not only need to know all of the commonly used as well as some out-of-date terminology, but you’re going to need to demonstrate your ability in some trying situations.
TIG welders use an inert gas (often argon or helium) to shield the joint from contamination from the air.To become certified,a TIG welder needs to pass a strenuous practical exam and an interview to demonstrate he/her knowledge and skill.There are all sorts of tig welding tests for pipe welding that involve a tig root pass and hot pass…with a stick fill and cap.
This is a very common tig welding test that comes in all sizes and thicknesses and in different material types.You could spend a lot of your trying to buy all the different sizes of pipe to get some practice before going to take a tig welding certification test. Ads
Since pipe welding is one of the most common activities for TIG welding,be prepared to discussing purging and how it prevents weld oxidation also known as sugar.You’ll likely be expected to describe the varied types of tungsten used,depending on the metal being welded,and demonstrate various welding techniques,such as forehand versus backhand welding or either technique with a mirror for blind welding,freehand TIG welding and walking the cup, including ratcheting, wobbling and sliding the cup.Many pipe welding job interviews will focus extensively on your walking-the-cup techniques.
Since a large percentage of tig welding tests are on carbon steel, one way to get some practice is to just get some 3/16 ” thick cold or hot rolled steel flat bar that is 2-4 inches wide and about 8 inches long.
I made long video last year showing how a corner joint with a 1/8″ gap can be used to simulate a pipe root gap and explained how the same mig welding settings and mig techniques could be used to weld the inside corner joint as was used on a open butt pipe weld.
The same joint is a great way to practice your technique before heading out for parts unknown to take a tig welding test.I dont know about you, but I dont like driving for 15 hours to stay in some flea bag motel only to get up the next morning to fail a welding test because I didnt get any practice.
I would much rather feel some little bit of confidence from doing something close like a mock up if not the exact test.The exact test is usually impossible to practice.But what if you could set up a mock up and use the amperage setting that worked for your test??
A corner joint using 3/16″ 1/4″, 3/8″ thick carbon steel can provide experience, and is a confidence builder and its cheap compared to buying beveled pipe welding coupons.I get emails frequently from welders who are either going to a school that does not have beveled plates, or they are practicing on their own with plate or pipe they bevel themselves with a grinder.
The only way to prepare is to practice until your techniques are solid and you are comfortable that you can describe every step of the process, as well as why you might use a particular technique over another for a specific weld.