HOW TO CUT UP HUGE FUEL TANK?

Diesel is suprisingly hard to ignite. Ive seen someone drop a lit match into a bowl of diesel and it just put the match out. To be honest I think you'd be safer with a grinder than a plasma cutter though much lower temperatures.

Diesel needs a wick to burn atmospherically. As said you can extinguish a match in it. When I smoked I would regularly put a fag out in it. Cutting wheel would be preferred but plasma will do. Stop periodically to allow to cool.

Or if its liftable a lorry with a winch just to get it out the way

Could be red diesel for forklifts etc?

Beat me to it!
This might be worth more as a complete tank than as a pile of cut up scrap to be weighed in.

Apologies if that's already been ruled out for some reason but my father in law's business is scrap metal and he often has to tell people that they've spent days cutting stuff up that was worth much more while complete.

I've personally cut up over a dozen of these! We used to strip out old factories prior to redevelopment.

As has been said, you will need to get as much of the fuel out as possible before doing anything. You may find there is still fuel that's clean enough for use in something still in there, but there will normally be quite a bit of water and sludge in there too. If you're weighing the tank in, it will need to be pretty much cleaned out or the scrappy might refuse it. We used to put the waste into 45gal drums and have it collected - wasn't that expensive.

With it emptied out, we would get in and cut all the internal bracing with oxy gear. It won't explode, but it does get a bit smokey! Don't do this unsupervised and have fire fighting gear on hand.

We then cut the tank into manageable chunks with the oxy gear. Cutting it up with disc cutters will take forever and you will have issues with the steel grabbing the blades all the time as it settles under its own weight.

You will find that it sets on fire at this point! If you are not worried about the smoke and heat issues, carry on cutting. If it is going to be an issue, have someone on hand to keep things damped down with a hose - just remember any water that goes into the tank will be contaminated and need disposing of in the correct manner.

They do get bloody hot if you just let them burn though and they can be pretty smokey, so be careful!

Joe

edit:
just had another look at the pictures. It's not actually that big, so you will probably be able to cut all the bracing from outside.
I'd knock the bunding wall down to just a couple of courses before doing any steel cutting - that should give you better access, but still allow you to contain any spills.
Can't you get a truck round there to hiab it away in one piece? May be a quicker and considerably easier option!

^^^ what he said or if there is time ebay it, its worth more as a tank than scrap

Make a nice hot tub