
Originally Posted by
Brian Hjelm
The procedures used by my mate were the standard of the time and probably would have been thought a bit excessive by many.
Whilst steaming for 24 hours and then testing and being certified gas free may be today's best practice, I will bet that only major corporations, big shops, mines, etc. have the facility. I bet most small repair shops are still doing it the way it was done 50 years ago but with the added safety feature of the ready availability of welding gases like CO2 and argon and mixtures to flood the interior of the tank. Nobody outside heavy or specialist industry had mig/tig until recent times.
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