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Satish Lelesatish.lele@gmail.com |
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AutoCAD Package is prepared in such a manner that it can be easily customized. Program for Drawing Process & Instrumentation Diagrams is such a customized program in my PROGRAMS for PIPING Series, for AutoCAD Release 12 onwards. The program is based on AutoLISP and symbols or blocks are created as and when required and then inserted. Bill of Material is created by a VBA program, which creates a table in MS Excel. In case of valves, the pipe line is cut in that portion. Since blocks are created each time, there is a lot of saving of Disk space. Since the program is written in AutoLISP, it can be even modify further. The different pipe lines are arranged on different layers. This is a menu driven program. Special Dialogue Boxes are created to make the program more user friendly. |
- pi : We can select items through pull down menu
- picon : We can select items through pull down and then through icon menu
Pull Down Menu to Create Lines : The lines are arranged on different layers, and the layer name is same as line number. The line number is generally in format : Size-Service-Line Number-Spec. The existing lines are shown in the list box.
- New Line Number : We can add new lines to the box by typing in New Line Number and select add. New layer is created, and it is displayed in list box.
- Edit Line Number : To edit an existing line number, we select a line number from list box, enter a new line number and select edit line number. The old number in list box is replaced by new number.
- Delete Line Number : To delete an existing line number, we select a line number from list box, and it is deleted.
- Draw Line : We can draw lines on a particular layer using this option. For this we have to either select a line number from list box, or type in a new line number.
Pull Down Menu to insert Instruments : We can insert Instruments in the lines. We select an Instrument to be inserted. We are then asked to select where it is to be inserted.
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Pull Down Menu to insert valves : To insert a valve in a line, we select a valve to be inserted. We are then asked to select a line at left insertion point on that line. The line is cut and valve is inserted in the line. Valve is put on the layer of the line.
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MISCELLANEOUS EQUIPMENTS
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Pull Down Menu to insert Steam Fittings : We can insert Steam Fittings in the drawing. We slect a Steam Fittings to be inserted. We are then asked to select a line at left insertion point where it is to be inserted. Steam Fittings is put on the layer of the line.
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Pull Down Menu to insert Pipe Fittings : We can insert Pipe Fittings in the drawing. We select a Pipe Fitting to be inserted. We are then asked to select a line at left insertion point where it is to be inserted. Pipe Fitting is put on the layer of the line.
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Pull Down Menu to insert Strainers : We can insert strainers in the drawing. We select a strainer to be inserted. We are then asked to select a line at left insertion point where it is to be inserted. Strainer is put on the layer of the line.
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