Quote:
Originally Posted by GregWeld
If your weld is popping ---- it's DIRTY!
Or you're welding on junk tube. Tough to TIG Galvanized water pipe... Which I doubt you're doing. In fact -- don't TIG galvanized anything.
Tubes tend to build up heat inside and draw oily smoke into the weld...
And - if you're trying to close up the tube ... and it's a short piece... I punch a 1/8" hole at the end for a heat escape - otherwise the pressure build up of the expanding heated air inside can blow thru right where you're welding as you're trying to close it up.
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Didn't consider the pressure build up, it was fully closed but the small volume probably added to POP. Contamination most likely the culprit, new stock tubing properly prepped externally but I didn't take a bore cleaning brush and solvent to the inside. It was a fast and dirty project............and another learn by experience event. Regrinding tungsten is similar punishment to writing something a 100 times on a chalkboard.
