I have over 30 years total TIG welding, over 90% of that purge-welding on SS pipe while building Teflon lined pipe for the chemical/paper industry. got out of welding for a few years, now trying to get back in. it seems like nearly every good paying traveling job (shipyards etc) that advertises for welders to TIG SS pipe then says "you must pass the following test to be hired. " and it is invariably a test where you TIG a root in carbon steel pipe, then either fill & cap with MIG / fluxcore, or fill & cap w/7018. why do they insist on you passing a test that is irrelevant to the work you will be doing? I just cannot wrap my brain around this riddle...

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