The tube sheet layout tool now also shows the OTL value.
Based upon request of our customers, the free engineering tool for the tube sheet layout now also shows the outer tube limit (OTL) value. Previously only the Outline Tubes value was shown. This value is the sum of all tube outlines together and can be used to calculated the heat transfer area (=outline tubes * number of tubes).
The OTL is the diameter by encircling the outermost tube in the tube layout from the center of the heat exchanger. The OTL is used for the design and calculation of a tubesheet. For example: it will determine the clearance between the outer tubes and the internal diameter of the shell.
If you have suggestions for the free engineering tools please let us know!