tig welding aluminum fuel tanks

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Hi I would like to build a aluminum fuel tank for my welding truck.  Basically it would be used as a slip tank so I could fill up in the field and go longer periods without hitting the fuel station.  I heard all fuel tanks need to be double walled and need baffels and pressure vents.  Can anyone shed so light on to this iam in a pretty big hurry to get my rig deck doneThanks
Reply:Baffles are always a good idea to prevent sloshing... that way the pick-up tube won't starve for fuel.A vent is a MUST but can be incorporated into the cap, it doesn't necessarily have to be an extra piece welded into the tank.As far as double walled....never heard of it being mandatory. In off road racing, we are required to have a can around our fuel cell...basically making it double wall for safety reasons. I guess it's not a bad idea for everyday use.- PaulLast edited by ZTFab; 08-08-2006 at 12:30 AM.http://all-a-cart.comWelding Cart Kits and accessories
Reply:Tractor supply company sells these right off the showroom floor.  They used to carry a brochure that had a little diagram, almost as good as a set of plans...it might be behind the counter now, because I didn't see it the last time I was there.  It even listed all the features.  If you have a TSC nearby, it might be worth asking if they have any literature on their tanks.Smithboy...if it ain't broke, you ain't tryin'.
Reply:Dont know of any requirement for tanks to be double walled, an internal rubber bladder is always a good idea, though.I r 2 a perfessional
Reply:has anyone here built a aluminum tank and could possible show me a pic of the baffles and vent setup. The problem I have is that this is a custom size so I have to incorporate all of the components in the space that I have and still be able to carry a decent amount of fuel
Reply:I've built many custom fuel tanks for boats, trucks, equipment,etc. There's no rocket science involved, and the most important thing is to ensure it doesn't leak! Welding on a tank that has contained fuel is risky business, so the safe way to do it, is to make sure it doesn't leak to begin with!      I dont have pics of tanks, but for the baffles, space them evenly in the tank, to seperate it into several compartments, with the top and bottom corners of the baffle, notched to allow fuel and air flow through it. I've seen many unbaffled tanks crack, and leak due to the fuel sloshing and flexing the walls.......... as far as the vent, weld a coupler into the top, and use a hose, or incorperate it into the cap.   Be sure to pressurize the tank, with air, to about 3 or 4 psi, and check all the seams with soapy water for leaks.             Good luck, and have a good time!We need to protect Freedom of Speech, otherwise, how would we know who the A-holes (like me) are.