The way you set up a Plant 3D project is the single most important decision on the whole job, and most people treat it as the boring bit. It is the admin you click through to reach the real work, the modelling. So units get picked without much thought, the database takes whatever default is […]
The way you set up a Plant 3D project is the single most important decision on the whole job, and most people treat it as the boring bit. It is the admin you click through to reach the real work, the modelling. So units get picked without much thought, the database takes whatever default is offered, and the specs are left exactly as they came out of the box. Then modelling starts, and the Plant 3D project quietly carries those early decisions for the rest of its life.
It happens from the other direction too. You commission a model, take delivery, and only later find the project underneath was thrown together. The picture looks fine. It is everything behind the picture that fights you.
Here is the part worth slowing down for. That first setup shapes everything the model will ever do, because a Plant 3D project locks to those early choices. Some of them, your units and your database in particular, you cannot change later without serious pain. Every drawing, every report, every tag is decided before a single pipe is drawn.
So the question was never “how fast can we start modelling”. It is “have we set this up so it can do everything we will need”. Get it wrong and you have two options, both bad: live with a Plant 3D project that cannot give you what you want, or rebuild it from scratch.
When the foundation is wrong, the symptoms surface later and they are expensive. Specs that do not match the plant, so components come out wrong. Tags that ignore your site standard, so nothing reconciles. Isometrics in the wrong border and the wrong style, so every drawing needs reworking. Layering you cannot bend to the job in front of you.
If you own the site, that is an asset you paid for that cannot earn its full value, plus the cost of putting it right. If you engineer the site, it is you doing the reworking, you explaining why the outputs do not match the standard, and you redoing setup that should have been done once, properly, at the start.
A good Plant 3D project is set up deliberately. None of it goes as deep as a Smart P&ID project, which you can read about in our Layout of a P&ID article, but all of it matters.
A Plant 3D project is a structured container, run through the Project Manager, with a folder structure that holds your P&ID drawings, your 3D model drawings, your orthographics and your isometrics in one place. We build one project per site. Plant 3D can run both the P&IDs and the 3D models inside the same project, which is a valid way to work, but for brownfield modelling we prefer to keep them separate.
This is what makes a Plant 3D project different from ordinary CAD. The DWG holds the geometry, the shapes you see, while the database holds the intelligence, every tag, property and piece of data attached to the model. You choose where that database lives: a local database when one person is on the project, or SQL Server when a team needs to work on the same project at once.
Some choices lock the moment you make them, and units are the clearest example. You set the project as Imperial, Metric, or Mixed Metric, where nominal bore is in inches and length is in millimetres, and that decision stays. Get it right on day one.
Your specs are the biggest single setup decision. Autodesk Plant 3D builds its 3D components from a catalogue, picking standard parts and sizing them automatically from rules, rather than you modelling each one by hand. We get into how that works in a later article on basic versus spec driven modelling, and into specs and catalogues in their own article. For now the point is this: it ships with some basic piping specs, but it is well worth building your own, or modifying the supplied ones, to match your plant. That means your materials, schedules, pressure classes, weights, descriptions and manufacturers, and a good deal more. Specs cover your instrumentation and pipe supports too. Neonex Digital has over fifteen years building these catalogues and specs for clients across chemical, water and refining sites.
Tied to all of it is your nomenclature. Equipment numbers, line numbers and asset numbers are built from properties and joined into a tag, to your standard. Because Plant 3D works on a parent and child relationship, data flows down the hierarchy. Pipelines are children of equipment. Piping components, supports included, are children of pipelines. So a valve takes its size from the pipeline it sits on, automatically. Property data can also be pulled in from other sources, so the model can carry information you already hold elsewhere.
Layering and colouring are built into the project, unlike standard AutoCAD where you manage them yourself. You can colour the model by spec, by size, by status, by tracing, by insulation, or by any tag property, and because the project controls it, you can change it whenever you like. One client keeps their main models coloured by spec. But when we produce piping layout concepts for them, we colour by status instead, so existing lines show white and new lines show red. It is a clear way to show exactly what is changing, and we export it to Navisworks so they can present the concept to their engineering departments.
Isometrics and orthographics are set up here too. Isometrics work straight out of the box, but the customisation runs deep: border file, border fields, colouring and layering, symbology, dimensions and annotations. You can build more than one setup, which is how the same model produces, say, an NDT isometric showing basic end to end dimensions in black and white, no bill of materials but with NDT tables, alongside a full fabrication isometric with complete dimensions, a full bill of materials, and lines in black with dimensions in red. Orthographics follow the same idea, set up with your own borders, layering, colouring and annotation styles. We cover both in depth later in this series.
One habit sits alongside all of this: back the project up regularly. Backups are simple to take, and the only real question is how much work you would be willing to lose if something went wrong, a day, a week, a month.
Once a Plant 3D project is set up well, it stops being a one off. It becomes a template you roll out across every site you run, so your specs, your tags, your layering and your isometric styles are identical everywhere. That consistency is worth a great deal if you manage more than one site, and it is exactly what we set up for the clients who do.
This is where we start, before any modelling happens. At Neonex Digital we set up your Plant 3D project properly, to your standards, so it can do everything you need. We capture your site, build out the specs, catalogues and nomenclature to match your plant, and configure the layering, isometrics and orthographics the way you want them. With over fifteen years doing this across chemical storage sites, water utilities and refineries, we know which early decisions you will thank yourself for later, and we build the Plant 3D project so you only have to do it once.
If you have inherited a Plant 3D project that fights you, or you are about to start a new one, the setup is the part that decides everything that follows. It is worth getting right.
Next in this series: The Breakdown of Plant 3D Equipment.
