Some of us guys at work 48 years ago when i welded did a test on welds. We made a 4x4 cube out of mild steel. We welded fittings in it to pressure test it for leaks. Half of the seems were welded with a wire welder using CO2 gas and then the other half using argon. All of the CO2 seems leaked a small amount testing with soapy water. Argon never leaked.Your mileage may vary.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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