Piping & Instrumentation Isometrics (P&ID)
Drafting chemical and process piping spools with precise 30° skew angles, weld locations, and fitting elevations.
3D-Zeichnen, Rohrleitungen und Spielekarten
Isometric projection represents 3-dimensional objects on a 2D plane by foreshortening all three principal axes equally at 120° angles to one another. The grid consists of vertical lines (90°) intersected by parallel diagonals inclined at +30° and -30° from the horizontal.
h = s · sin(60°) = s · (√3 / 2) ≈ 0.866025 · s; θ ∈ {30°, 90°, 150°}Isometric projection was formalized in 1822 by Professor William Farish of Cambridge University. Farish recognized that mechanical engineers needed an optical drawing method that preserved measurable linear scale along all three axes without perspective foreshortening.
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Drafting chemical and process piping spools with precise 30° skew angles, weld locations, and fitting elevations.
Illustrating mechanical disassembly sequences, bolt patterns, and internal sub-assemblies with measurable 1:1 scale.
Mapping multi-level isometric dungeons, cliffside terrain, and three-dimensional castle interiors for gaming campaigns.
Constructing pixel-perfect retro game environments, building cutaways, and modular furniture prototypes.
Identify the three primary axis directions: vertical for height (Z), +30° right for length (X), and +30° left for width (Y).
Draw the overall envelope of your object along the primary isometric lines using direct measurement increments.
Non-isometric edges (such as roof slopes or bevels) cannot be measured directly. Locate their endpoints along isometric lines, then connect them.
Construct circles on isometric planes using the four-center rhombus approximation method or isometric ellipse guides.
Physical millimeter spacing applies along all three axis directions. Verify that the distance between vertical lines matches your selected spacing using a ruler.
Skizzieren Sie Diagramme, tragen Sie Messpunkte ein oder zeichnen Sie geometrische Formen direkt im Browser.