Butt Weld Tube Fitting Spacing

[Bunt23]

I have a mixing chamber that I'm designing, and there is a 1" butt weld pipe fitting that will be welded on the outlet hole with a 1/8" fillet weld around the fitting, as shown in the attached picture. The outlet hole is 0.87" in diameter and its center is situated 0.94" above the bottom edge of mix chamber, as shown in the other picture. The mix chamber is 0.09" thick SS sheet metal. The bottom of the mixing chamber is attached to a base plate with a 1/8" fillet weld around the OD. It would be beneficial to our process to have the outlet hole as close to the bottom edge as possible, but I'm not sure how close I can get before the welds on the outlet pipe and the base will be too close such that they start to cause issues. Right now, if you do the math, the bottom-most edge of the outlet hole is 0.505" from the bottom edge of the mixing chamber. Does anyone know of a standard spacing requirement for this type of weld application? I'd like to put that outlet hole a little closer towards the bottom edge of the mixing chamber, but if it's too close I'm scared that the edge would warp. Any help is appreciated!

 

[Bunt23]

Here's the second picture

 

[Bunt23]

And here's the third picture

 

[EdStainless]

Where your fitting welds to the wall should be a full penetration weld.
If you fillet weld it on you will create a large area of crevice behind it and almost assure corrosion issues.

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P.E. Metallurgy, Plymouth Tube

 

[Bunt23]

You are correct. A detail I forgot to mention... there will be a sanitary grade weld around the outlet hole on the inside of the mixing chamber as well to prevent that.

 

[EdStainless]

You need to use one weld, not one inside and one outside.

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P.E. Metallurgy, Plymouth Tube

 

[Bunt23]

Ok, so a full penetration weld, then? Any insight as to how close I can get to the bottom edge without causing any warping issues?