# Pressure Vessels and Heat Exchangers

## BS5500 - Calculation of factor 'C' for figure 3.5.5(3)

You must read and understand the *disclaimer*

I disagree with the calculation of the factor C given by some commercially available design
software and present here an iterative method for calculation of factor C,
based on Appendix R. If you plot the figure using this method wou will find that it very closely matches the
figure printed in BS5500:1991.

Unfortunately I no longer have access to the current edition of BS5500, and am unable to present the
equations in original form at this time. If you can help, please
email me.

You may use this fragment freely as you see fit providing you accept the conditions of the disclaimer,
though I do insist that you email
me if it is incorporated into your software.

appdxr.c

Iain W. Bird

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