Originally Posted by Bill Seal
This thread seems to have gotten becalmed in the Horse Latitudes, but I'll give it another try: The tank I'm having made will be about 20w x 15 long x 20 high. Most aluminum tanks appear to be 0.080" material, does this seem to be too thin, and would 0.125 be recommended?, or am I being OCD.
I made a 27 gallon fuel tank
( gas ) out of .125, 5052 aluminum. I had the tank quoted and they quoted it out of .100, 5052. But the cost difference between 0.100 and 0.125 was not significant. So I went with 0.125.
I wouldn't bother with 0.080. Its harder to weld and you have a lot less strength. It might be enough initially, but if you have any corrosion
, you have a lot less margin.
0.125 might have been a slight overkill for a 27 gallon tank, but it should outlast me. My tank was quite flat since it lays under a center console deck
Your tank is nearly square. So you will have big flat sides. I'd go with 0.125 on that tank and rest easy. If you are wondering, have them quote it with 0.100 vs 0.125. I'll be surprised if the difference is $50. For custom tanks, the cost is mostly labor (engineering, quoting, fabrication, etc). Aluminum isn't cheap
, but labor and overhead is still more than 50% of the material costs. I think I had about $250 in materials with shipping
. The tank that I was quoted was over $600 plus shipping
. Make sure you don't have any dissimilar metals in contact with the tank. Also, I would sand, prime and paint
the tank before installation