Lmao tell me you have no idea what you're talking about without telling me. You probably prompted an AI that got confused and tried to tell you you'd get 5-10 min of burn time out of a small set of tanks.

First off the dude in the pic is welding. You can see the grounding clamp on the back of the truck. Welding sparks are white, torches are usually orange. And to get a welder to hit gas inside of a tank... 1-2 seconds.

If somehow those are torches in the picture, you can get oxy torches through the (up to) 2mm thickness of those tanks in no time (maybe like 1-2 seconds). Here's a video of a guy cutting though 1/4" ~6mm in seconds, for reference: https://youtube.com/shorts/JLijFDI-qgA