Because the main pipe run size is used for Olet taps, there are some challenges around branch welds. When working with AutoCAD Plant 3D, accurate weld linear length calculations can improve piping system project planning, integrity, and efficiency. One common pitfall that users need to be aware of is the misleading nature of the TapWeld size. Here’s why you should be cautious and how to avoid mistakes in your calculations.
Understanding TapWeld and its Challenges
In AutoCAD Plant 3D, TapWeld is a Joint, or Connector, Accessory. This joint is deceptive because it always displays the main pipe run size as the Nominal Diameter. Hence, determining weld lengths for all TapWelds is challenging but achievable.
Whenever o-lets are inserted, the P3D Connector joining the main pipe run to the branch fitting is a Tap by default. Unfortunately, P3D presents the main pipe run size, leading to challenges in accurately accumulating the total linear inches of weld needed around olet piping components.
Exploring the Related Project Settings
In AutoCAD Plant 3D:
- Plant 3D DWG Settings > Piping Connection Settings: Fasteners, like the TapWeld, join two piping parts. There are numerous default Joint Names, and the default for the connector between olets and pipe is the Tap Joint.
- Fasteners and Tap Welds: Tap JointTypes have Tap Weld Fasteners found under Connector > Accessory on the AutoCAD Properties palette. Use ctrl-click to select the tap node and access Tap Weld properties. Here, the Size value is set to the main pipe run when the branch size is needed.
Solution Ideas for Accurate Calculations
To ensure accurate weld linear length calculations, follow these steps:
Extracting All Welds: Extract all welds from the [P3dConnector] table where the [JointType] column contains ‘weld’ and ‘tap’.
Accumulating WeldParts: Extract the parts connected to the part ports identified with port names (S1, S2, S3, etc.). WeldParts can be accumulated from the [P3dPartConnection] table. Collect the welded part port Names or SIDE codes.
