In this paragraph you will learn how to create, open, delete and copy equipment or items using the Item menu. Make sure that you have created or opened a job entry as described in the previous paragraph called Jobs.
In VPMS an item can be any type of pressure vessel. We will create horizontal vessels, heat exchangers and generic vessels. A generic vessel is an item with an arbitrary number of pressure parts. You can use this type of vessel to design one or more custom made pressure parts or to experiment with alternative design data or conditions.
2.3.1 How to create a new item
Item menu: New
To create a new item use the Item menu entry New and select one if the sub entries. You can choose one of the following pressure vessels types:
A) General vessel
B) Horizontal vessel on two saddles
C) Shell and tube heat exchanger
D) Vertical column on a skirt.
For each new item you must enter a unique item number. This number must be unique within the job you are working on.
A) General vessel
Item menu: New - General vessel
This will open the New general vessel dialog. Enter a unique item number and click the OK button. VMPS will create a new item of type General Vessel. You can use this type of vessel to make separate calculations for pressure parts like cylinders, heads, flanges etc. You can read about adding and deleting parts in chapter 3 Parts.
B) Horizontal vessel
Item menu: New - Horizontal vessel
This will open the new horizontal vessel dialog. You must enter a unique item number (Vessel number/tag) and you can choose the type of head from a drop down list. Click the Ok button to create the vessel. VPMS will create a new horizontal vessel and add the 4 default pressure parts (1 cylinder, 2 heads and saddles). Optionally you can change the default numbers for the pressure parts. For example you can change the default pressure part number CYLINDER into SHELL BARREL.
C) Heat exchanger
Item menu: New - Heat Exchanger
The fist dialog you see is the heat exchanger type dialog. With this dialog you can choose the TEMA type for the heat exchanger you want to create.
- Use the mouse to click on one of the Front end channel pictures. In the centre of the window you will find a character indicating the TEMA type for the selected front end channel The lower part of the window will show an enlarged copy of the small picture you selected.
- Click on one the small Shell pictures you find in the top middle of the screen. Again the dialog will show you the TEMA type character and an enlarged copy of the selected Shell section.
- Click on one of the Rear end Channel pictures.
- Check the heat exchanger configuration (removable bundle and tube sheet type) and click the Create button. This will open the New Heat Exchanger dialog.
- Enter a unique item number and selected the type of head. Optional you can change the pressure part numbers and descriptions. Click the Ok button to create the heat exchanger.
In the chapter Heat Exchanger Design you can read about how to start the mechanical design of the newly created heat exchanger.
While selecting the TEMA type of heat exchanger you want to create you have to look carefully at the number of flanges around the tube sheet. If you create a AEU type of heat exchanger there are two possible configurations.
One with a removable bundle and another with a none removable bundle. The first configuration will have flanges on both sides of the tube sheet. The second one with the none removable bundle will have only one flange connected to tube side of the tube sheet.
2.3.2 How to open an item
Item menu: Open
This menu entry will open the Item Open window. Use the mouse or arrow key to select an item and click the Open button or press the ENTER key. VPMS will load the selected item data and all the pressure part connected to the item. At to top of the screen you can change the item data like the revision number and item description.
Click the save button the save the changes. The bottom half of the screen will show a list of the item related design documents and pressure parts. In the chapter Heat exchanger design you can read how to start the mechanical design of the selected heat exchanger.
2.3.3 How to delete an item
Item menu: Delete
You can only delete the currently open item. To delete an item open it and select the Item menu entry Delete. VPMS will open a Yes/No dialog. Select Yes to delete the item or No to cancel the deletion.
2.3.4 How to copy an item
Item menu: Copy
With this menu entry you can create a copy of the currently open item. You can copy an item from one job number to another or create copies of an item within the same job number. This way you can create multiple copy of an item with different revision number. You could also create copies to design the item for changed conditions or alternative materials.
The Item copy window has two sections. The upper section called Source job & item is for selecting the source to copy from. In lower section called Destination job & item you can select the job number to copy to and enter a new item number. This item number must be unique within the destination job number you selected. To start the copy function click the Copy button. VMPS will copy all item data and related pressure parts to the new item number.