Socket Weld Connection (heat transfer)
Socket Weld Connection (heat transfer)
(OP)
What is the temperature during the process of welding a 3/4" pipe into a socket weld connection?
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Socket Weld Connection (heat transfer)
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RE: Socket Weld Connection (heat transfer)
The materials being welded? Depends on those materials, but the melt points are easily looked up.
Temperature of the arc? Ask a plasma scientist, as it's debatable if you can actually use those terms.
Peak temperature of something connected to the tube, but some distance away from the weld joint? Ah, that is a heat transfer problem. Will depend on the time required to complete the weld, wall thickness of tubes.
RE: Socket Weld Connection (heat transfer)
RE: Socket Weld Connection (heat transfer)
RE: Socket Weld Connection (heat transfer)
Argh; this does not answer my question. Are you worried about the temperature of fluid in the pipe (as in a hot tapping process, as zapster suggested)?
Or is "your product" some valve or other solid object that is being welded to?
RE: Socket Weld Connection (heat transfer)
RE: Socket Weld Connection (heat transfer)
RE: Socket Weld Connection (heat transfer)
Now do it again, but assume the weld takes some finite time to put down (do several iterations from 15 seconds to 5 minutes).
Now do it a third time with a tube stub on one side that can soak up heat.
RE: Socket Weld Connection (heat transfer)
The equation used by most of us involved with welding is Q=(IxEx60/V) where I is amperage, E is voltage, and V is the travel speed. What isn't accounted for is the efficiency of the welding process, i.e., how much of the energy is actual transferred into the weld puddle.
The welding process and the welding parameters influence the energy per unit time introduced into the weld. That being the case, you can select a welding process such as GTAW that has inefficient heat transfer and low welding amperage, a short arc length and high travel speeds to minimize the energy introduced into your part. A cool down period can be used to allow the heat to dissipate before doing damage to you part.
Since the material being welded is unlikely to form martensite upon cooling, you can hasten the cooling between passes with a blower or with wet rags applied to the area adjacent to the socket joint.
Best regards - Al
RE: Socket Weld Connection (heat transfer)
All the heat input problems can be minimized with smaller weld pass sizes and plenty of time for cooling between passes. I do not know much about your situation so I can't tell you if cooling between passes using accelerated methods is best. In my work, we are often trying to do the opposite during welding, trying to keep all the part warm enough. Good Luck!
RE: Socket Weld Connection (heat transfer)
RE: Socket Weld Connection (heat transfer)