tube to tubesheet expan
tube to tubesheet expan
(OP)
Here my problem.
I have to expand the tubes into tubesheet by rolling
Tubesheet: 304L (holes 25.69mm)
Tubes: CuNi 90 10 (dia 25.4mm x wall 0.7 mm)
How much is the percent wall reduction?
We usually use this value:
Diameter of tube hole “df”
Outside diameter of tube “de”
Inside diameter of tube (after expansion)“D”
Inside diameter of tube (before expansion)“di”
Tube wall thinning (%) “T”
Formula D= di + (df – de) + (de – di) x T
TUBES MATERIAL Tmin Tmax
Carbon steel 8 12
Low alloy steel 8 12
Stainless steel 5 8
Al & all base alloy 4 5
Thank you.
I have to expand the tubes into tubesheet by rolling
Tubesheet: 304L (holes 25.69mm)
Tubes: CuNi 90 10 (dia 25.4mm x wall 0.7 mm)
How much is the percent wall reduction?
We usually use this value:
Diameter of tube hole “df”
Outside diameter of tube “de”
Inside diameter of tube (after expansion)“D”
Inside diameter of tube (before expansion)“di”
Tube wall thinning (%) “T”
Formula D= di + (df – de) + (de – di) x T
TUBES MATERIAL Tmin Tmax
Carbon steel 8 12
Low alloy steel 8 12
Stainless steel 5 8
Al & all base alloy 4 5
Thank you.





RE: tube to tubesheet expan
I'm not sure if i agree with your chart. Carbon steel is normally more like 5-8% and aluminum is more like 10-12%, IIRC.
-Christine
RE: tube to tubesheet expan
RE: tube to tubesheet expan
http://www.elliotttool.com/ttools1.htm
-Christine
RE: tube to tubesheet expan