UJOR Build Thread

WhiskeyJr

New member
Ha, depends on who you ask. Steven just went to SC last weekend and re stocked his arsenal.



Thats a bad (expensive) habit

Careful, illegal interstate transportation of fireworks can be harshly penalized if caught.


Learned that one the hard way.


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derjack

Adventurer
Another thing you can do is to pipe exhaust through it as you weld.


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...or nontoxic, nonflameable gas, like “N“. Gas tanks are way more dangeros than diesel. Anyway it is ONLY thecritical mixture ( gas vs oxigan) that can explode. It has nothing to do the overall volume of gas in the tank.
 

patoz

Expedition Leader
...or nontoxic, nonflameable gas, like “N“. Gas tanks are way more dangeros than diesel. Anyway it is ONLY thecritical mixture ( gas vs oxigan) that can explode. It has nothing to do the overall volume of gas in the tank.


AKA - UEL (Upper Explosive Limit (to rich)) and LEL (Lower Explosive Level (to lean)). The range in between the two is explosive.
 

Navi

Adventurer
A guy my sister went to school with was welding a hole in a gas tank without doing much prep. They found bits and pieces of him all over the shop.

I've patched many many many diesel tanks. Mainly 3/16" wall tanks on oil drilling rigs. Some while diesel is barely dripping out. Some we drained, cleaned, then purged with nitrogen.
 

Bikersmurf

Expedition Leader
I'll not take chances. A photographer friend had to take some pictures for a police investigation. A couple workers were cutting up large gas station fuel tanks... The coroner had difficulty identifying the remains. This with tanks that had been drained and removed months previously.
 

luthj

Engineer In Residence
At work (large jet aircraft) fuel tanks are drained and ventilated for almost a week before mechanics can enter to inspect and/or repair them. Diesel fuel is not volatile enough at room temperatures to be explosive. It is actually fairly difficult to get fuel tanks to explode. A fire is fairly easy though.

Regardless, in the unlikely event of a fuel tank explosion, only a the fuel vapor will contribute energy to the immediate blast. That being said, the enclosed vessel will serve to contain the explosion, at least for a few milliseconds, which amplifies it. At which point the container become shrapnel and any remaining liquid fuel creates a firebomb.... :Wow1:

If welding in a well ventilated space above the fuel line, the tank can be inerted by flushing/filling with nitrogen, argon, or carbon dioxide. The exterior must be free of fuel vapors, as an exterior flash or explosion is still possible.
 

SHAFT

Observer
second that, this is terrifying......i'm pretty negligent but after cutting and welding my tank, i'm still here. So i'm not negligent enough?
 

ujoint

Supporting Sponsor
VivaLaVida is back!

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