Flange Allowance

The flange allowance column allows a default method of specifying the extra material required for loose flanges or extruded.

Any flange with an SCOM COMPYPE attribute set to ALLO is considered as requiring extra material. If a flange requires an allowance then the value is taken from the pipe data table and put into the ALLOW attribute of the flange and the LOOSE attribute is set to TRUE.

The flange allowance value in the pipe data table is an expression so it could be related to the wall thickness for example (10 * pwallth(1)) would give a value of 10 times the wall thickness at p1 of the flange.