A 3D Geomset is a grouping of the primitive elements which make up a Piping Component, Joint or Fitting. It specifies the dimensions, orientation and obstruction geometry of each primitive. The Geomset defines what is drawn for a particular Component by PARAGON (and other AVEVA E3D™ modules), and also defines the obstruction geometry of the Component for use when clash checking. Each Component is built up from a combination of three-dimensional primitives, as listed in 3D Geomsets (GMSET).

Creating a Geomset consists of creating the relevant member primitives and setting the attributes for each primitive. For each primitive the OBST attribute must be set, whilst for a primitive that is required to be drawn the LEVEL, TUFLA and CLFLA attributes must also be set. (Refer to Component Design and Representation in PARAGON and Equipment and Primitives for details of these attributes.) 3D Geomset elements and their attributes are listed in 3D Geomset Primitives.

By using the TUFLA and CLFLA flags, you can create two different drawings of a Component, a double-line representation (tube) and a single-line ‘stick’ representation (centreline).

To define the tube representation for the tee shown in Figure 5:2.: Example of Parameterisation for a Reducing Tee (with clash geometry) the commands shown below could be used. (The P-points in the following examples relate to the Pointset defined in PTAXI.)

To define the centreline representation for the tee (with welded joints), the following commands could be used. Figure 5:10.: Centreline Representation of a Reducing Tee shows the symbol produced. The illustration is drawn with REPRESENTATION PPOINTS ON LENGTH 0 NUMBERS ON. The P-points are thus displayed as dots, but they cannot be seen because they lie on the displayed LINEs.

Note how a P-point has been used to define an axis direction and origin for a primitive - see Reference Section for details.