Question about autogenous welding issues in T316L/T304L
Question about autogenous welding issues in T316L/T304L
(OP)
I am looking to test some SS tubing to determine the sulfur and other elemental component levels. We are experiencing some issues with consistent penetration in our welds, and it seems to be primarily confined to a certain batch of tubing. Although I have test reports for the material stating that it is within our spec., Im sad to say that I do not trust the reports. What test method can be used on this material to determine the true contents. I would like to do some testing, but I feel like I need more info. first.
Thanks to all
Thanks to all





RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
Thanks for your help.
RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
parameter that isn't to be violated. The tube end have to be
square and flat and, "No Bevel of any sort". you cannot
break the edges of the tube either on the inside or outside. Any
chamfer on either side will result in lack of penetration or incomplete fusion or concave cap. It is best not to tack weld a tube to tube weld.
We used De-Staco clamps to hold the tube while welding with the orbital welding head. We air tested right after welding and later hydrotested 100% of the tubes, even though it wasn't needed
You can beat your quoted price for orbital tube welding head as we have two and I know we didn't pay that much for either one
Also you can rent some brands of machines. The two companies below will rent or lease their equipment
http://www.arcmachines.com/products/fusion-welding
http://www.tritool.com/tube_squaring.asp
RE: Question about autogenous welding issues in T316L/T304L
If you set weld parameters to assure full pen in low S then you will have ugly weld shape when you get higher S.
Look at orbital weld heads. The control is much better.
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Plymouth Tube
RE: Question about autogenous welding issues in T316L/T304L
Thanks for your replies.
RE: Question about autogenous welding issues in T316L/T304L
I would definately try to get an Orbital Welding Head by hook or crook.
RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
RE: Question about autogenous welding issues in T316L/T304L
Yes I have. We actually weld in that position (infrequently) for longer parts, so I have a spare positioner I will use for testing these new parameters. I am trying to find a device(torch holder)that has a wheel that rests (or rolls) on the tubing as the part turns,allowing us to set the tungsten distance, and not have to worry about concentricity issues that we have with the chuck and various fixtures that we use to hold different shapes of parts. So far, I have only found one that looks like it will work, but Im having trouble getting info. on it. That device will only work in the vertical orientation, but I think that is the way to go to eliminate the variation of arc length we currently have.
RE: Question about autogenous welding issues in T316L/T304L
Before orbital welding came along we built a welding lathe, actually two 3 jaw chucks with both rotating off a common shaft. The torch was mounted between two parallel bars with a hinge on one end. We had an adjustment screw on the bars to set the standoff distance. We mounted the torch on the side of the tube away from the operator to where he had clear view of the arc.
RE: Question about autogenous welding issues in T316L/T304L
Any facts to confirm or deny this?
Thanks again for your help.