Tube formulas
Tube formulas
(OP)
Hi All.
I'm looking for two formulas:
1. The number of tubes that can fit in a given circular arrangement similar to a boiler.
2. The length of tubing needed to form a coil.
Thanks in advance.
I'm looking for two formulas:
1. The number of tubes that can fit in a given circular arrangement similar to a boiler.
2. The length of tubing needed to form a coil.
Thanks in advance.





RE: Tube formulas
Make a coil, unroll it and measure.
Questions entirely too vague.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Tube formulas
http:
rmw
RE: Tube formulas
From this ratio you can work from the number of tubes to the tubesheet size, or the other way around.
What it does not take into account is any partition plates to create multipass units, and also the unperforated area around the edge of the tubesheet.
2. When you bend a tube to make a coil the outer edge will stretch, and the inner edge will compress. So the total length of the coil measured on the outer edge will be longer than the tube that was used to make it, but the total length on the inner edge will be less than the original tube. The choice of which length to use depends on what you want to use the calculation for. If I was estimating how much tube to purchase I would use the outer edge to ensure that I had sufficient pipe. If I was estimating the length to get the area for heat transfer I would use the inner edge to ensure I was not overstating the area.
RE: Tube formulas