How to bending double tube heat exchanger
How to bending double tube heat exchanger
(OP)
I would like to make double tube heat exchanger for my refrigerator.
and somebody please recommend me for method to avoid inner tube crushing when bending it
and somebody please recommend me for method to avoid inner tube crushing when bending it





RE: How to bending double tube heat exchanger
Best to use Swagelok Heat Exchanger Tees or equal for this process.
RE: How to bending double tube heat exchanger
RE: How to bending double tube heat exchanger
But paraffin has always worked for me.
Just as a note, if you ever need to put tight bends in large tubes use BB's to fill them.
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P.E. Metallurgy, Plymouth Tube
RE: How to bending double tube heat exchanger
We never pack the interiors or the annulus with anything. We pick our tightest bend radius based on the outer tube. We accept quite a bit of oval its but no buckling/kinking. We bend on ordinary flat pipe cylindrical mandrels for the most part.
Don't concern yourself with the fact that the outer and inner tubes will touch at a point and the annulus won't be continuous. In our experience it does not negatively affect heat transfer in most services.