Managing the standard catalog
The
"standard geometry tables" standard catalog is managed in the base project on the "Base
objects" tab.
"@30 > M23 > A10 > Y30 > A10 Standard geometry tables"
Implementation of geometry standards in COMOS
Geometry standards are implemented in COMOS in the form of base objects that contain the
"standard geometry tables". The actual dimensions are listed in the "standard geometry tables"
in relation to the nominal diameter. See also chapter Structure of the standard catalog for
geometry standards (Page 21).
If a pipe part uses a geometry standard, the attributes in which the dimensions are saved
reference this type of standard geometry table. In the engineering data, the dimensions of the
pipe part are then read from the standard geometry table and written to the attributes.
Parameterized access
The "standard geometry tables" standard catalog is parameterized according to system of
standards, connection type, nominal pressure, and flange shape. See also chapter Structure
parameters (Page 21).
You do not usually link the pipe part directly to a standard geometry table. Instead, you
generate a calculation formula which returns the path to a basic table. The corresponding
dimension is then read from the standard geometry table.
The calculation formula comprises fixed and variable components. The variable components
evaluate the structure parameters. The values of these parameters at the pipe part determine
the basic table from which COMOS reads the dimensions for a pipe part.
See also chapter Using the "CatStd(...)" function (Page 32).
User-defined access versus internal calculation formulae
Internal calculation formulae are provided as standard with the flange joint.
COMOS uses internal calculation formulae in the following cases:
● 3D attributes required for calculation of the component dimensions are not set.
● The attributes are not set up at the "3D geometry" tab.
See also chapter Determining the component geometry of a pipe part (Page 28).
See also
Structure of the standard catalog for geometry standards (Page 21)
Preparing for creation and maintenance of pipe specs
3.4 Managing the "standard geometry tables" standard catalog
PipeSpec Designer
20 Operating Manual, 09/2014, A5E32076948-AA
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