how to draw 3d pipe in autocad
What is Piping Isometric Drawing?
One time the three-dimensional (3D) model has been established in piping design software similar PDS, PDMS, or SP3D, Pipage Designers/Engineers need to convey that information to the yard for fabrication and site for Construction. The transferred data must have to be sufficient for the fabricator with the vision of what is to be fabricated and how the piping should exist connected with other elements, with verbal dimensions and complete build/Bill of materials (BOM). This is where Piping Isometric Drawings play a magnificent role. So pipage isometrics are directly used for the post-obit situations:
- For Construction Services
- For marking upward deviation during site modifications/ as-builting.
- For reference equally Stress Analysis model built up and terminal stress mark up for updating stress requirements.
Piping isometrics indirectly helps to calculate many parameters required during project execution like:
- Inch Meter can be estimated as Length of pipage (in meter) x Size of pipe ( in inch )
- Inch Dia is calculated as Size of Pipage joint ( in inch) x No, of Joints
- Pipe Weight is calculated every bit π ten diameter of the pipe (in m) x length (in m) x thickness (in mm) 10 density of pipage fabric. Density of CS = 7.85 g/cm3
- The volume of Water required for hydro testing is estimated every bit π x {Piping ID (in meter)}² x Length of Pipe
- Insulation Surface area (in m²) tin be found as [π(Pipe OD+ insulation thickness)] (all in meter) x Length of Pipage (in meter)
By definition, Isometric drawings are a pictorial representation that combines summit-width-depth/length into a single view with 30 degrees from its horizontal plane equally shown in the below attached image.
Features of Piping Isometric Drawing
Isometric Drawing is a two dimensional (2D) drawing that represents the 3D pipage system. The important features are
- It is not drawn to the scale, but it is proportionate with exact dimensions represented.
- Pipes are fatigued with a single line irrespective of the line sizes, also as the other configurations such as reducers, flanges, and valves.
- pipes are shown in the same size. The actual sizes are notified in Neb of Material, tagging, call-out, or notes.
- A pipe isometric drawing provides all the required information similar:
- Pipe Line Number
- Continuation isometric number
- Flow direction
- Piping dimensions
- Piping joint types, weld types
- Flange and valve types
- Equipment connection details
- Pipage and Component descriptions with size, quantity, and material codes
Pipage Isometric drawings are popular because of their simplicity nonetheless efficiency to convey complex information. The following figure gives an example of how one Isometric cartoon can represent three orthographic drawings. That is just a simple piping drawing. Imagine circuitous design and yet orthographic drawings are used for construction, that is really a headache.
In earlier days, Isometric drawings were hand-drawn. With the innovation and advancement of the digital age, isometrics are drawn by AutoCAD/Microstation software. In contempo days, the 3D models could automatically extract the Isometric with a single click of a mouse.
How to Read Piping Isometric Drawings?
i. First, imagine that the piping system is built in a box. This basic imagination is required for the piping to have an get-go. So, it will help yous to imagine, how the piping configuration will look like as it travels.
2.Commencement happens when the pipage turns to any angle other than 90-degree or to accommodate odd nozzle'south location or tie in point connections. A popular utilize is a 45-caste elbow and this is used extensively in piping design. In such cases, pipage design may land on Northeast, Southeast, Northwest, or Southwest axes. In order to check the dimension of pipe length with offset, common Pythagoras'southward theorem and Trigonometric rule tin can be used. A sample calculation is shown below as a reference-
Example of length calculation in Piping Isometric
Case of beginning
If yous happened to take difficulties in reading the first, endeavour to depict the imaginary box. It could help you lot in having a amend understanding of which axes the pipe travel and how the piping should look like. In the instance given, accept the flow from 'x', the pipe goes up; then up-northwest; then north. As you get along with Iso a lot, things will come naturally.
3. A North arrow is provided in all piping isometrics to inform the location of the pipage system in piping/ general organization drawing.
iv. The piping isometrics also hascoordinates & tiptop detailed data to verify the exact length of pipe in horizontal and vertical axes respectively. The dimensions in Isometric drawings are measured from the pipe centreline and non from the outer diameter of the pipe (refer to the epitome attached below for reference).
With the advocacy of technology, there could exist minimum or even cypher possibilities that the North arrow, coordinates, and pinnacle in Isometric would differ from the pipage arrangement; hence the dimensions and MTO should lucifer exactly if the source 3D model is the same.
Nonetheless, It is always improve to check and verify as in that location could be some issues with the modeling itself that may cause discrepancies in material and quantity. For example, if double piping is modeled by mistake, it will read the double quantity of fabric.
five. Isometric drawings too inform which pipe should be constructed at the fabrication shop and which should be assembled at the construction/platform field itself. The consummate pipage system is separated into pieces that are transported to the site for erection. These pocket-size piping pieces are termed pipage spools. One sheet of Isometric cartoon ordinarily has few spools.
Every weld that is assembled betwixt spools at the structure site is termed afield weld (FW). In that location is ane more type of weld that is known as field-fit weld (FFW). This FFW is divers by the designer if he/she could foresee that the spool might require some adjustment before the final fit-upwards, so at the location of FFW has been marked, it will be given some pipage length tolerance (normally 150-300mm). Usually, FFW will occur at the nozzle of equipment or necktie-in locations.
The whole assembled pipe will await like the following later on it is assembled at the field.
Pipe isometric cartoon symbols
For reading and understanding a pipe isometric drawing, 1 should acquire the pipage isometric drawing symbols thoroughly. Ordinarily, all these pipe and pipeline drawing symbols are constant and does not vary much from one organization to the another. Knowing the piping drawing symbols will provide various data like:
- Type of Piping Joint: Pipe and pipeline drawing symbols throw lights on the type of articulation like Buttweld, socket weld, or Threaded.
- Type of pipe Components: Isometric drawing piping symbols serves as a gear up reference for type of fittings and components.
- Instrument items: Knowing the piping isometric symbols volition help in recognizing the instrument and special piping items in the isometric.
- Equipment Connection: Equipment connected to a pipe system is as well understood with piping symbols.
- Knowing piping symbols for isometric drawing is useful in preparing MTO/BOM.
Commonly used piping isometric drawing symbols are shown beneath for reference purpose
Video Tutorial of Basics of Piping Isometric Drawing
The post-obit video tutorial on the nuts of piping isometric drawing volition clarify some of your doubts.
Some more Resources for you lot…
Salient Points to check while reviewing Pipe Isometric Drawings
Training of Pipage Isometrics
Types of Piping Drawings
References
- Credit to other sources: svlele.com, wermac.org, pipingengineer.org, thepiping.com, spedweb.com, enggcyclopedia.com, rishabheng.com
- https://www.sciencedirect.com/topics/technology/piping-isometric
Source: https://whatispiping.com/basic-piping-isometric-drawings/
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