‘Clamp’ symbols can show up on piping isometric drawings when modeling hygienic mechanical joints like the Tri-Clamp®.
The Isogen SKEY for Tri-Clamp end type needs to include a ‘CL’ for this graphic to come out. CADWorx users need to know that by default the SKEY for a Tri-Clamp by Butt-Weld ferrule comes across as MPBW so the clamp graphic will not show for a Tri-Clamp joint. If a clamp graphic is desired the SKEY for Tri-Clamp ferrules must be changed from MPBW to CLBW. Here is what the difference looks like and please note that it is not necessary to have a clamp in the CADWorx model…
ECE recommends making the SKEY override in the Project (PRJ) file. In this way every Tri-Clamp ferrule will be populated with the desired SKEY automatically.
This is done by browsing to a ferrule, under the flange section, and then typing in the Isogen Symbol Information. Unfortunately, these fields are always blank even though CADWorx does assign an SKEY. Perhaps someday CADWorx development will populate these fields so we know what will be passing to the models and isogen when adding a new component. Anyway, this example calls for the Identifier to be CONNECTOR and the the SKEY to be CLBW (Clamp x Buttweld) as illustrated below. These overrides are simply typed into the fields. One Applied and Saved, this SKEY will pass to the CADWorx model and be flagged automatically as an override.
Another option to consider is simply overriding the SKEYs on components after they are placed into the model. This is accomplished by using the CEDIT command then clicking the ISOGEN button. Within the Isogen Data dialog one can check the Override for the SKEY and type in ‘CLBW’ as shown below. By the way, this is exactly what it will look like if the ISOGEN Symbol Information is changed in the PRJ file as described above.
SKEYs define so much of the graphics output for Isogen. It is important for users to know they have controls within the CADWorx Specification Editor and the Component Edit (CEDIT) dialog box to set SKEYs. Users also have an SKEY Symbol Editor where they can design custom symbols or modify standard symbols to meet specific requirements. Taking control of SKEYs will definitely improve isogen output quality so it is worth getting to know more about them.
Here are some links a few ECE Training Videos that have more information on SKEYs. Please note that both videos require you to log in with the proper access level:
1. SKEY Editor Overview
2. CEDIT Dialog – A Deep Dive