Welding Conical Tubes

We have a subcontractor who welds small 316 s/s custom cones when the standard hygienic pipe reducers are too big but they would be unhappy to give away their hard won art for free. However, I do know that the biggest problem seems to be with polishing inside these smaller structures after welding under inert gas. Machining from solid may be a better approach.

Hello,

You folks may wish to use a TIG torch using only Argon, use 1/16" rod. With stainless, you can use water in an atomizer and cool as you go, it would be my thought to weld a small section, use an atomizer and cool it off, continue welding another small section etc etc. Not sure how well this will work for your purposes, but nothing tried, nothing gained.....

Forget about welding sheet, its too cumbersome and messy for those size cones. It is faster and easier to spin the cones (metal spinning) from either sheet or tube (seamless tube). With a well designed setup you can feedbothe cones on the same machine using the same size tube. YOumay need to heat the tube, most SS is quite ductile. Mild steel may work harden somewhat. either way you will get excellent finish inside and out and very little waste if any.

TIG be very carefull

If you need lots just buy them (Sinmag Taiwan is good.) For just a few I found MIG easier (I'm a lousy welder) and use a flap disk on the outside and flap wheel on a die grinder on the inside to remove the extra metal. For stainless put a copper slab on the other side of the weld to suck up the heat and stop warping.

good luck, derek

MIG with Cored wire(no Gas needed) is your best solution.Use flattened mandrel+jaws pushing from sides.

Ask for Quotation/supply of a 150Amp machine+cored wires(ss&Carbon Steel) from:

Ms Sucy Lou < kelong@kelong-co.com> . Say I referred<mikemahant@hotmail.com

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