User-defined Nominal Dimensions

For users who required bores, bolt diameters and lengths, and rod diameters that are not included in the standard nominal values stored in core, a facility exists for the creation of tables that hold the required values in the Catalog database.

When being switched from module to module, the Catalog database is scanned for a NBRWLD element with the PURP attribute set to BORE indicating that user-defined nominal bores etc are to be used. If so, the nominal bore-checking routine is switched to the user-defined nominal bores.

Bores

For most users, the requirement is adding or removing a few bores. For this purpose, a macro of standard AVEVA E3D Design bores is provided (nominal_bore.mac), which enables a user to edit the values concerned and then input the User-defined Nominal Bore table into the Catalog.

Bolts

When there is a need to use a bolting Catalog with both Imperial and Metric projects, there is not always a direct conversion from one system to the other. For example, a ½ inch bolt may convert to a 12mm rather than a 13mm one.

To overcome the problem, User-defined Nominal Bolting tables for diameter and length can be set up, as for the User-defined Nominal Bore table. The PURP attribute is set to BDIA for bolt diameters and BLEN for bolt lengths.

Rods

When rods for hangers and supports are specified, the rod diameter is related to the bore diameter. It is, therefore, necessary to have User-defined Nominal Rod Diameter tables, if User-defined Nominal bores are being used.

If a hanger connects to a branch with different bores, the rod diameter is selected to match the branch with the User-defined Nominal bore or, if this applies to neither branch, the standard piping bore. The PURP attribute is set to ROD.

Database