hi all

[fifan74]

Hi there to everyone from sydney australia by way of salt lake city utah. I have been wanting to give this a go for a very long time and figured how a got my keg for free it was time to start my research. I made a mistake and did not make my first post here to introduce myself and posted a question in the mentors section that did not get answered....hope i did not ruffle too many feathers.
Anyhow i am a machinist with about 20 years in the industry and i am way into making my own things and am lucky enough to have an entire shop at my disposal for making just about anything. that being said and out of the way here is a copy of my first question that i asked the mentors that did not get answered if anyone can help.

Hi all first time poster here. I have spent countless hours over the last few weeks filling my brain with the wealth of fantastic knowledge here and have now decided to start my build. I am building just a regular old pot still as i only plan on making whisky. As luck would have it someone put a 15 gallon keg in the stainless recycle bin yesterday and i was the lucky guy that found it. Anyhow i am interested in building a electric boiler with it and would like to put a 6 inch or 150 mm weld neck flange on the side where the heating element will go and use a 3/4 inch or 19 mm flat face flange with about 8 3/8 in or 10mm bolts to tighten it to the flange that i will tig to the keg itself. offset in the flange(so i can adjust where the heating element is in the mash in subsquent runs) i will drill and tap the threads for the heating element. my question is this can i use a copper gasket in between the 2 ss flanges for sealing? I know that high performance race engines use copper head gaskets so it kinda made me think of a way of building my boiler a little bit different and i am really interested in doing it this way to clean it. do you think i am wasting my time by attempting this? Just a little bit about me i am a machinist by trade so the machining of. the flanges and making the copper gasket are not an issue nor is the tig welding. Thanks in advance for any help.