Question:

Why do I get the message "For Class 150 flanges, ASME B16.5 para. 5.4.2 recommends gaskets to be in accordance with Fig. E1, Group No. I"? What does this message mean?

Answer:

This message will always be returned by COMPRESS whenever Class 150 flanges are specified. The message is for information only and does not indicate any particular design problem.

If the user does not wish the message to appear, he can select the option "Suppress warning messages" on the Deficiencies dialog that appears when the calculations are run. (Warning messages can be restored using the Set Mode Options dialog/Environment tab; remove checkmark from "Suppress warnings from deficiencies list").

The gasket selected in COMPRESS for ANSI/ASME B16.5 and B16.47 flanges has no effect upon the warning message or upon the flange MAWP rating. The selection in COMPRESS of gasket type for standard flanges is not used for calculation purposes, it is reported in the Drafting program, Coster, and exported in the XML data exchange file.

Standard selection data is provided for Flexitallic gaskets. No other gasket manufacturers offered to make their gasket information available in electronic format suitable for inclusion in COMPRESS. Users can add other gasket types by clicking the "Edit Gasket List" button and entering the necessary information.