Archive for December, 2010

Subassembly Composer for Civil 3D 2011

December 16, 2010

Autodesk Labs has released a preview of the new Subassembly Composer.  This is a standalone program for you to create custom subassemblies.

After you have created the subassembly to your liking, you can import it into Civil 3D as shown below:

12-16-2010 3-45-02 PM

You can read more about this from Autodesk’s Jason Hickey on the Being Civil blog, and another good write up on this is from Joshua Modglin on the civil3d.com blog.

Have a Merry Christmas, and stay tuned for more blogs coming your way.

Plant Construction Series

December 8, 2010

Process Pipe (pipe and tube)

Tubular products are termed ‘tube’ or ‘pipe’. Tube is customarily specified by its outside diameter and wall thickness, expressed either in BWG (Birmingham wire gage) or in thousandths of an inch. Pipe is customarily identified by ‘nominal pipe size’, with wall thickness define by ‘schedule number’, ‘API designation’, or ‘weight’. Non-standard pipeis specified by nominal size with wall thickness stated.

The principal uses for the tube are in heat exchangers, instrument lines, and small interconnections on equipment such as compressors, boilers and refrigerators.

Next time

Commonly use Sizes and Lenghts for Steel Pipe

AZelaya

Total Cad System Inc.

AutoCAD P&ID’s Tips and Tricks

December 8, 2010

Tip

By default, the tree view shows only nodes with content in the current drawing or project. You can refresh the Data Manager view at any point to return all columns to the default descending sort order. Refreshing the data view also refreshes annotations and Off-page Connectors in the current drawing.

AZelaya

Total Cad System Inc.

AutoCAD Plant 3D

December 8, 2010

Structure Ribbon

For the creation of steel structures. On the ribbon you will find not only the commands to create a steel structure, but also several tools to fine tune how elements of the steel structure connect to each other.

the structural modeler in AutoCAD Plant 3D is not intended to create production ready drawings for structures, its purpose is to setup a structure which can be use for placing equipment and routing pipe.

The Structural Ribbon contains the following parts; Sturctural Members, Grid, Railings, Stairs, plate, Grating, Footing and Ladders. and you will be also capable to Modify, cut, change the visibility and Export to SDNF

Next time:

Tool Palettes in AutoCAD Plant 3D

AZelaya

Total Cad System Inc.

Piping & Instrumentation Diagram Series

December 8, 2010

FlowLines on P&ID

All Flow lines and Interconnections should be shown on P&ID’s. Every line should show direction of flow, and be labeled to show area of project, conveyed fluid, line size, piping material or specification code number (company code), and number of the line.

Line Number example: 74-BZ-6-412-23 may denote the 23rd line in area 74, a 6-inch pipe to company specification 412. ‘BZ’ identifies the conveyed fluid. This type of full designation for a flow line need not be used, provided identification is adequate.

Piping drawings use the line numbering of the P&ID, and the following points apply to piping drawings as well as P&ID’s

  • For a system of lines conveying the same fluid, allocate sequential numbers to lines, begining with ‘1’ for each system
  • For continuous line, retain the same number of line (such as 23 in example) as the line goes thru valves, strainers, small filters, traps, venturis, orifice flanges and small equipment generally-unless the line changes size
  • Terminate the number of the line at a major item of equipment such as a tank, pressure vessel, mixer, or any equipment carrying an individual equipment number
  • Allocate new numbers to branches

As with the process flow diagram, directions of flow within the drawing are shown by solid arrows placed at every junction, and all corners except where changes of direction occur closely together. Corners should be square. The number of crossing should be kept minimal by good arrangement.

Process and service streams entering or leaving the process are noted by hollow arrows (Offpage Connectors)  with the name of the conveyed fluid written over the arrohead and the continuation sheet number within it. No process flow data will normally be shown on a P&ID.

Next time

Notes for lines, showing equipment and Special Items

AZelaya

Total Cad System Inc.