I did a little homeowner work yesterday and then made my first move on the oil tank for TVI. The weld-in bung is pretty short. It was designed to be poked down into the tank until it bottomed out on the flange so it would be only about 1/8" proud of the sheet. However, TVI wants it to be parallel with the bottom of the tank, rather than at the 8-degree angle of the top sheet. I'm going to weld the bung into a tube that I'll cut at the proper angle and then weld the tube to the top sheet.
So how did I arrive at the 8-degree angle, you ask? Let me count the ways. First, I checked the angle with a protractor. Second, I used the trig formula tan A= a/b and looked up the number in the Trig Tables in Machinery's Handbook. Third, just to get a little better with the calculator on my phone, I ran the numbers and figured out how to enter the second function on the tangent. The protractor gave an approximate 8-degree answer, the trig tables gave me the answer in degrees and minutes, and the calculator gave me the answer in a decimal format. Sounds like a lot of work but it only took me about 5 minutes.
I'm still contemplating my sequence of operations for putting this thing together. There are quite a few fittings that need to be welded into the tank and each one of them will potentially warp the edge of the sheet. I'll give it a little more thought before I jump in.
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