Getting Started
with AVEVA E3D
Functions : How AVEVA E3D™ Data is Stored : MODEL Database Element Types
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When the database is first built, it is empty except for a single element named the WORLD, every database has its own WORLD element as the first element in the hierarchy.
Below the WORLD element, the second level of the hierarchy is a SITE element. A SITE element may be considered as a significant collection of project areas, whose size is not necessarily determined by physical area, but by practical considerations. It may, for example be the whole project, or one part of a large project. There can be as many SITE elements within a AVEVA E3D™ project as required for data organisation.
Equipment items are built up in AVEVA E3D™ using elements known as primitives. Each piece of equipment can comprise any number of primitive shapes positioned to form the item. The primitives may be owned directly by the EQUI element or by a Sub-Equipment element. An equipment item would typically be a pump, or a vessel, the box, nozzles and cylinder primitives are clearly visible in the pump shown below.
Primitives are the basic building blocks of AVEVA E3D™, they are used by other disciplines to create catalogue components. There are many types of primitive, each with its own features, which when combined with other primitives can represent complex shapes. Examples of primitives are nozzle (NOZZ), box (BOX), cylinders (CYLI) and pyramids (PYRA).
Structural profiles are represented in AVEVA E3D™ by general section (GENSEC) elements. I-section profile sizes are selected using a Section Specification that references standard catalogue data for section sizes complying with various national standards. Plates are represented by panel (PANE) elements.
Branch elements are sections of a pipe, which have known start and finish points. In AVEVA E3D™ the start and finish points are called the Head and Tail. Heads and tails may be connected to nozzles, tees or other Heads and tails, depending on the configuration of the pipe, or left open ended.
Piping components are selected using Piping Specifications that reference standard catalogue data. For example, each time the user wants to use a 100mm bore elbow, AVEVA E3D™ always accesses the data for it from the component catalogue. The data for this remains constant no matter how many 100mm bore elbows are used in the design.
