Heat Exchanger Fabrication Question?
Heat Exchanger Fabrication Question?
(OP)
In a dilemma about exactly how tubes are stuffed in a multi baffle plate heat exchanger. The half plate baffles are already stitch welded on inside of exchanger pipe.
With only a 1/64" clearance in holes for tubes I cannot fathom how one would insert a 35 ft tube thru the full length of a pipe with half baffle plates every 8 ft..
It seems like you would need a broom handle type wood stick aligned thru full length of pipe thru each baffle and then use it as a guide for the tube.
I don't know, have you had any experience around heat exchanger fabrication?
Appreciate your comments and advice,
Robert
With only a 1/64" clearance in holes for tubes I cannot fathom how one would insert a 35 ft tube thru the full length of a pipe with half baffle plates every 8 ft..
It seems like you would need a broom handle type wood stick aligned thru full length of pipe thru each baffle and then use it as a guide for the tube.
I don't know, have you had any experience around heat exchanger fabrication?
Appreciate your comments and advice,
Robert





RE: Heat Exchanger Fabrication Question?
Are you planning to use guide 'bullets' in the tubes when you insert the tubes?
rmw
RE: Heat Exchanger Fabrication Question?
Thanks,
RE: Heat Exchanger Fabrication Question?
Tube are inserted and then expanded to form a leak-proof joint with the tubesheet throughout a mechanical roller expansion or a hydraulic expansion.
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RE: Heat Exchanger Fabrication Question?
Page 12 here:
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-TJ Orlowski
RE: Heat Exchanger Fabrication Question?
-TJ Orlowski
RE: Heat Exchanger Fabrication Question?
Do not be supprised if your baffles have to be cut loose. The placement tolerance of baffles with 1/64" total clearance spaced several feet apart will be on the order of plus/minus 0.001". Might even be less than .001".
RE: Heat Exchanger Fabrication Question?
Duwe6, we will set baffle plates with laser as we have done in similar circumstances calling for tight tolerances.
RE: Heat Exchanger Fabrication Question?
Now that it seems that you have gotten the answers you were looking for, I have a question - purely curiosity.
How did this Hx question get put in a pipeline forum, especially with the quality of the sites heat exchanger forum?
rmw
RE: Heat Exchanger Fabrication Question?
We use a an H section turned on it;s side to hold the bundle while being fabricated. you may have to use a guide bar of far end, nothing but a rounded bar.
rmw
The shell is a section of pipe.
RE: Heat Exchanger Fabrication Question?
I am sorry I did not see a Heat Exchanger forum here, only placed here because of Piping, Fluid Mechanics.
Even tho all have been very helpful here and have answered my questions could you please direct me to the Hx forum in case I have other related concerns.
Thank you,
Robert
RE: Heat Exchanger Fabrication Question?
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RE: Heat Exchanger Fabrication Question?
At 61, I just may need glasses. ;)
Thank you,
Robert
RE: Heat Exchanger Fabrication Question?
I should loan you mine. The don't do me much good anyway.
I was just curious about the forum choice, nothing else. Since both fora involve fluids, a lot of us lurk in both places.
I never dealt with a lot of Hx's that were built in pipes. Most that I ever had to deal with had heavy rolled plate shells that had to be pulled up on the bundle once the tubing was done. But the method of aligning the baffles up prior to tubing is about the same in either case. The baffles have to be well aligned or the tubing will be hell if you can do it at all.
rmw
RE: Heat Exchanger Fabrication Question?
Also a very helpful place for questions such as the OP.
-TJ Orlowski