Finally got some pics transferred from my phone!
This is the most recent tank I completed. Its 3/16" 304 stainless steel from top to bottom, with little exception. The exception being pipe fixture are 316 stainless. Welding procedures include spray arc mig (GMAW) and TIG (tungsten inert gas).
The tank is about 14' diameter, the circumference as I recall is like 44' 1/4-ish (outside dimension), it varied a little. The diameter was achieved using a single piece of 3/16" plate 4' x (44' 1/4") then it was rolled to the radius to make the shells. Shells are stacked until we cant go any higher and have to lay the tank down. This one was done in two halves, 4 shells each or 16' long x 14' dia.
The tank was tested a few different ways. Part were vacuum tested for air leaks, then fully ultra-sounded and xrayed, and pressure tested by pumping it full of air to a pre determined psi and then it has to hold for a few days. I passed all tests.
Here is one of the parts I like most, TIG welding the pipe fixtures!
Heres the inside of my half of the tank, you can see the seams which are full penetration welds. First welded (spray arc mig) on the inside, then go outside and grind about half way into the weld, and then fully weld the outside. Thats done at
EVERY seam running both the vertical and horizontal! In total, I welded 432 feet of solid weld bead. That doesnt include any of the TIG welds and other components in the tank, like the coil...
Heres my half on the outside, 16' layin down. Theres also some carbon steel on the end to the left which is also MIG welded to the stainless.
This is a shot of the coils. They were rolled in the shop and assembled outside the tank and TIGged.
And finally for now, I took a pic on the inside after the two halves had been joined! This is lookin the 32' length!
I have pics of the tank loaded on the truck but they wont transfer right from my phone...