1. Select Equipment Tools>Edit Component from the Equipment menu.
2. Pick vertical vessel T-135. The Vertical Vessel placement dialog displays with the same parameters you entered when you placed the vessel.
3. Change the value of parameters C and D to 0.
4. Press OK. The following message dialog displays indicating that since you defined the vessel skirt parameters C and D as 0, the vessel will be re-drawn without a skirt.
5. Press OK to redraw the vessel without the skirt using the modified parameter values.
LESSON 6 PRIMITIVES AND STRUCTURES
EQUIPMENT provides an expansive array of custom object primitives to enable you to create your own equipment components. The primitive placement options are divided in the menu and toolbars into three types, Equipment Primitives, Associative Primitives and Transition Components.
When you construct equipment from primitives, the first primitive placed becomes the parent component.
This primitive must be placed from the Equipment Primitives menu. You may then associate as many associative primitives or transition components as needed to the parent equipment primitive to build your equipment. The options in the Associative Primitives menu will prompt you to select an existing equipment item or primitive to associate the new primitive. Associative primitives may be attached to any existing EQUIPMENT component or primitive.
The Transition Components menu provides commands to place transition pieces when building a custom piece of equipment. For example if you have a square piece and a round piece and you want to “join”
them together, then the transition component should be used. Transition components are also considered associate components, which indicates that they must be attached to an existing component.
Constructing equipment assemblies in this manner is best described as a process similar to attaching nozzles to equipment. In this example, if you modify the vessel dimensional parameters, the nozzles will move accordingly. In this same context, if you modify the parent primitive of an equipment assembly, the child primitives will be moved or sized accordingly.
For example, if you construct an equipment assembly by placing a rectangular solid base, then attach an axial cylinder to the base, then attach a second axial cylinder, then modify the height of the base, the attached cylinder shell primitives will be moved in the vertical the distance of the modified solid base height. In addition, if you change the width of the first cylinder, then second cylinder width will automatically adjust to the modified width of the first cylinder because it is its child.
Each primitive will have a drawing database record, which can be modified. Each primitive will have a reference point for associating nozzles or other primitives. If you want to connect nozzles or other primitives to an equipment assembly, you must select the correct assembly primitive to associate the nozzle.
For example, if a vertical vessel assembly is constructed from primitives using a 4’ associative axial cylinder primitive for the first shell section, a 2’ associative axial cylinder primitive for the section shell section, and an associative head primitive for the vessel head, if you want to attach a nozzle to the first shell section, 2’ from the bottom of the first shell section, you must pick the first cylinder primitive when prompted to Select Equipment. If you pick the second cylinder primitive, the nozzle will be placed 2’ up from its reference point, which will actually place the nozzle 6’ up from the bottom of the first shell section.
As mentioned previously, when you connect a primitive to another primitive or equipment item, it becomes associated to the first parent primitive as a child or slave primitive. If you modify the dimensional parameters of the parent, the child will be moved or sized accordingly.
The nozzle placement routines also handle the vessel assembly as individual objects. Therefore, when you place a radial or axial nozzle on equipment created from primitives, you must be sure to select the correct primitive to place the nozzle form that primitive’s reference point.
Objectives
This Lesson introduces EQUIPMENT’s associative primitive and structure placement options. The objectives of this Lesson are as follows:
• Learn how to add an elliptical head associative primitive to the bottom of the vertical vessel
• Learn how to attach an axial elbow nozzle to the bottom of the vertical vessel
• Learn how to attach ladder and circular platform structures to the vertical vessel
Exercise 1 Adding a Head to the Bottom of the Vertical Vessel
In this exercise, you will learn how to attach an elliptical head associative primitive to the bottom of vertical vessel T-135. Move to the FRONT view before performing this exercise.
1. Select Associative Primitives>Heads>Elliptical from the Equipment menu.
2.. Pick a point on vertical vessel T-135, nearest the location for the elliptical head, to display the Associate Elliptical Vessel Head dialog.
3. Enter the head parameters as shown below.
4. Make sure that you enable the Link Diameter check box. This option associates the diameter of the head to the diameter of the vessel. Therefore, if the diameter of the vessel is modified, the diameter of the head will also be modified automatically.
5. Press OK to attach the head to the vertical vessel.
Exercise 2 Adding Legs to the Vertical Vessel
In this exercise, you will learn how to attach legs to vertical vessel T-135. The legs, lugs, and heads are classified as associative (ASSOC) type components, which means that they can only be placed by associating them to an existing component.
1. Select Vessels>Add Legs from the Equipment menu.
2. Pick vertical vessel T-135 to display the Legs on Vertical Vessel dialog. Do not pick the point on the head.
3. Enter the leg parameters as shown below.
Note: As referenced in the prompt description for parameter C, when inserting legs the vessel reference point is based on the vessel’s original insertion point.
4. Press OK to attach the legs to the vessel.
Exercise 3 Adding Nozzles to Tower T-135
In this exercise, you will learn how to place an axial elbow nozzle on vertical tower T-135. As mentioned previously, nozzles are associative components. Therefore, you must pick an existing component to form the association. In the case of axial nozzles, when you pick the existing component, you must make sure to pick the desired end. The placement routine will place the axial nozzle on the end closest to the point that you picked to form the association.