Back gas question.

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I would like to know why I couldnt use water to take up some room in a stainless steel container and then back gas a smaller area so as not to fill a big area with gas. Thank you?
Reply:Hello, Nobody home?
Reply:That sounds a little odd. I don't know why you don't just build a back purge specific to what you're welding. Water and super heated metal usually don't play nice together. Even if there is shielding gas between them, I would imagine the heat from welding would cause some of the water to vaporize which would reak havoc on your weld. But I suppose it really all depends on the specific application. How much heat are you going to have to put into it, how much of a gap between the weld and the water. I've welded on parts partially submerged in water in an attempt to control distortion (not my idea) so I kinda see how it may work to reduce the volume of shielding gas needed. I guess just give it a try (preferably on a test piece) and let us know if it works.
Reply:Sounds like nother job for Solar B weld flux.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Nothing wrong with it assuming the condensation is kept out of the area to be welded.  Kind of silly to do though when it's so easy to make small dams out of rice paper, cardboard, etc.
Reply:Originally Posted by WelderskelterI would like to know why I couldnt use water to take up some room in a stainless steel container and then back gas a smaller area so as not to fill a big area with gas. Thank you?