hierarchy in pdms_ world, site, zone
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2/21/2015 Hierarchy in PDMS: World, Site, Zone
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Hierarchy in PDMS: World, Site, ZoneHierarchy in PDMS (Plant Design Management System): World, Site,ZoneIn the previous post, we saw the PDMS overview. I will cover WORLD, SITE, ZONE aspects in PDMSsoftware developed by Aveva Plant to create 3D models.
Before anyone starts modeling in the design module of PDMS, he should be well acquainted with theconcept of hierarchy in PDMS i.e. WORLD, SITE & ZONE.
All PDMS data is stored in the form of a hierarchy. A PDMS Design database has:
a top level, World (usually represented by the symbolic name /*)
two principal administrative sublevels, Site and Zone.
Hierarchy in PDMS
If you login to PDMS SAMPLE project with design module, the tree shown in fig.1 appears under the DesignExplorer.
At the top of the tree is WORLD which contains number of SITES. In each SITE there are number ofZONES. While modeling the designer shall model in the correct SITE & the correct ZONE as per thephilosophy decided at the start of the project by the Lead Engineer & PDMS Administrator. Theseinstructions are generally covered in the document called as 3D Modeling Execution Procedure or 3DModeling Job Notes.
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2/21/2015 Hierarchy in PDMS: World, Site, Zone
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Fig.1: Hierarchy in PDMS SAMPLE project
The concept of hierarchy can be explained with an example shown in fig.2
WORLD in PDMS:The complete plant area appearing in the Plot Plan or the overall layout can be considered as “WORLD” forthe Project. In the example the complete deck area highlighted in thick black border can be considered asthe area available as WORLD in the PDMS. All the PDMS modeling shall be limited within this area.
SITE in PDMS:In a project, the Plot Plan or the overall layout is divided into several subareas based on the sheet (A0 orA1) and the scale (eg. 1: 100 or 1:50) used for developing the equipment layout.
In the equipment layout for each subarea there are different equipment & components of each disciplinei.e. Mechanical Equipment, Piping, Electrical, Instrumentation, etc. These subareas are used to createSITES in PDMS.
In PDMS there are individual SITES created for different disciplines for each subareas. Referring to theexample the deck area is divided in to four subareas AREA1, AREA2, AREA3 & AREA4 by the thick redlines.
For AREA1, there are different SITES created in PDMS as PIP_AREA1, EQUIP_AREA1, STRU_AREA1,ELEC_AREA1, INSTR_AREA1 for modeling of Piping, Equipment, Structural, Electrical & Instrumentationrespectively. Similar SITES will be created for each of the subareas.
ZONE in PDMS:In each of the SITES created there are different categories of components which are required to bemodeled under each discipline.
For each category there is a ZONE created in PDMS.
eg. In a project there are different fluid codes or services (i.e. CD, CO, FW, OD, etc.), so the pipes can becategorized as per the fluid codes or services. Using the above categorization in the example there aredifferent ZONES created for each fluid code or service as PAREA1/PIPECD, PAREA1/PIPECO, PAREA1/PIPEFW, PAREA1/PIPEOD.
The above split of WORLD, SITE & ZONE can be seen in the Fig.3.
Generally in a project the creation of SITES & ZONES is the responsibility of PDMS administrator.
The PDMS designer will not have permission to create SITE & ZONE in the project. PDMS designer has therights only to model the equipment & component in the ZONE.
So while modeling the PDMS designer has to check the physical location of the component on the Plot plan &equipment layout then select the proper ZONE in PDMS before start of the modeling.
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2/21/2015 Hierarchy in PDMS: World, Site, Zone
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In the example shown in fig.2, to model a pipe with line number CD4”AL0NL1PP in AREA1 you should beon the ZONE PAREA1/PIPECD to model the pipe.
The names used to identify database levels below Zone depend on the specific engineering discipline forwhich the data is used. For piping design data, the lower administrative levels (and their PDMSabbreviations) are:
• Pipe (PIPE)
• Branch (BRAN)
Fig 2 Example of a Deck layout
2/21/2015 Hierarchy in PDMS: World, Site, Zone
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Fig .3: Hierarchy in PDMS for EXAMPLE project
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