Diagrams User Guide
Diagrams : Piping & Instrumentation Diagrams (P&IDs) : Instrumentation : High Level Detail
High Level Detail
The Instrument Relationship Shape can be replaced by more advanced structures. The scenario presented in figure Figure 5:14.: Offline instrument is controlling a valve via actuator can be realized using the SCILIN, if a higher level of detailing is desired. In that case, the instrument line is a full featured line consisting of branches and segments, similar to the main flow lines. This will also cater for using any inline style valves and/or fittings within the instrument line if needed. Since SCILIN has a SCLORE pointing to a loop, any member of the SCILIN inherits the loop membership.
If desired, individual fittings can have a direct SCLORE making them direct members of another loop. This may be the case when bridging between different systems and/or signal styles.
It is possible to create control lines from tubes, valves etc. Those elements are the same elements that are created under pipe lines. To distinguish between those two line types in the Diagrams application when importing shape, AVEVA Diagrams gives the user new types to select:
1.
Instrument line - works similar to Pipeline, creates SCILINE element in database after drop.
2.
Instrumentation branch - works similar to Branch, creates branch, segment and tube under SCILIN after drop.
3.
Instrumentation tube - works similar to Tube, creates tube under segment.
All inline components (valves and fittings) have the same Visio shapes for two types of lines: pipelines and instrument lines. To distinguish them in the drawing it is possible to determine different colours for items defined under SCPLIN and items defined under SCILIN lines.
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