TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
(OP)
I was studying the various TEMA HEX options that have a floating tubesheet at the rear (e.g. Types P / S / T / W) and one fundamental that confuses me is whether the entire tube bundle weight is only supported at one end i.e the fixed tubesheet end?
Or is some sort of support provided at the floating end too?
The weight of a long tube bundle + liq. inside tubes & dynamic flow loads must be quite a lot for it to be self supported by the tubes alone, correct? Eventually these loads / moments must be transmitted to the shell somehow & thence to the supports?
Or is some sort of support provided at the floating end too?
The weight of a long tube bundle + liq. inside tubes & dynamic flow loads must be quite a lot for it to be self supported by the tubes alone, correct? Eventually these loads / moments must be transmitted to the shell somehow & thence to the supports?





RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
And in reality after a few years in service most of them don't move much at all (I have seen the distorted tube bundles to prove it).
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
Can you explain a bit more about how the floating tubesheet is supported?
e.g. In the drawings or event the 3D assembly videos I've seen it looks like the bundle is longitudnally and radially free to move at the read end.
Link to Video of a Floating Tube HEX
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
Part #28 looks like the baffles to me.
Isn't Part #15 the floating tubesheet?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
You're right, Nbr 28 are the baffles in the second view. There, the tubes are not restrained.
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
In either a T or S floating head case, an shellside expansion joint or some kind of packing on the tubeside exit nozzle is required for a 1 tubeside pass arrangement ?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
The cases that confuse me are the floating tubesheets with even number of tubeside passes. In those it almost seems to me from the sketches that the rear tubesheet is hanging cantilevered from the fixed tubesheet via the tube bundle.
That's the arrangement I'm confused about in the context of how the floating tubesheet gets supported.
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
-Christine
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
-----------------------------------------------
The U-tube design offers the advantage of reducing the number of
joints. In high-pressure construction this feature becomes of considerable
importance in reducing both initial and maintenance costs. The
use of U-tube construction has increased significantly with the development
of hydraulic tube cleaners, which can remove fouling residues
from both the straight and the U-bend portions of the tubes.
Mechanical cleaning of the inside of the tubes was described by
John [Chem. Eng., 66, 187–192 (Dec. 14, 1959)]. Rods and conventional
mechanical tube cleaners cannot pass from one end of the U
tube to the other. Power-driven tube cleaners, which can clean both
the straight legs of the tubes and the bends, are available
------------------------------------------------------
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?
But for the baffle to support the bundle weight:
RE: TEMA Floating Head / Tubesheet: Is the tube bundle cantilevered or supported at rear end?