Files for post: Contact Us (0 downloads)
Today’s topic grows out of a discussion held at CADWorx University 2010 between my esteemed colleague, Kyle Pope and edit: the Canadian “an esteemed Canadian colleague” Rod Abbott. They were trying to decide the best way to put nozzles on existing equipment. I happen to have my own take on that particular problem.
A couple criteria define which method to choose when using someone else’s non-CADWorx 3D model. First, is it accurate? Second, is it overly complex?
If the model isn’t accurate, we have to create it from scratch anyways. The second item is easier to handle since we can remove objects. If the model includes bolts or a similar level of detail, you will probably need to delete some of the finer objects. Especially if your model starts to get large, over-detailing will quickly lead to extremely slow performance.
Keep in mind, our sole object is to enable the connections for piping. Presumably if we are trying to use someone else’s model, we are not also sending it between PV Elite and CADWorx Equipment.
The first step is to get a model. I found one here: http://www.cadforum.cz/catalog_en/?q=Heat+Exchanger+Heads It’s a good practice to ask your vendors for a 3D model. Some already have them created, others may get them created for you. It never hurts to ask!
The model I choose only has four connections, but it is in metric units. I’ve scaled mine to Imperial due to my aversion to working in metric.
The trick I prefer to use is to create a small welded flat head, and put a nozzle on the end of it. Then you can move the nozzle to the location you need it. Make sure to grab all of the parts (the Equipment X and nodes) when you move it.
Start a new piece of equipment (I named mine 160E1):
Choose a welded flat head:
By default the welded flat head is quite large. Change the diameter 8 1/4” so we can match the reinforcement pad behind the nozzle. Also on the Placement Tab change the orientation to horizontal, and rotate it to 270 deg. You should have something similar to this:
Interestingly enough we should be able to line up the welded flat head with the red part of the nozzle. The easiest way to do this is by choosing the Specify On Screen option under the Location settings on the Placement tab.
By trial and error, I found the welded flat head should be about 3/4” long to match the red base of the nozzle. Now let’s place a nozzle on it.
The nozzle is 3 1/2” rated for 150 lbs. I changed the flange to Raised Face Slip On as well. The last dimension to tweak is the Outside Projection which by measuring is determined to be 3 3/4”.
Our nozzle lines up and is the correct size to match. The finishing touch will be to move the nozzle so that the node on the face of flange lines up exactly with the original nozzle. Start the MOVE command, do a solid window from the top left to the bottom right and hit enter to confirm the selection. Notice that we included the X which is the vessel intelligence and then nodes associated with our nozzle.
Then we can grab the center of our nozzle, and snap it to the center of the original nozzle. The original is slightly larger than ours, so the nozzle is hidden by the existing shape. The same process can be repeated for any connection. Remember that you can have multiple pieces of equipment with the same tag in the same drawing file.
Connect to the nozzle the same way as you would with any other equipment nozzle. An iso connecting to this nozzle should look like this: