PARAMETRIC · 3D · STEP / STL / 3MF
Square PipeSQUARE PIPE
Generate a square or rectangular tube with wall, length and corner radius. Download STEP, STL or 3MF.
- SectionSquare / rectangular
- CornersConstant wall
- OutputSTEP · STL · 3MF · DXF
LIVE · SQUARE PIPE
□20×20 × t2 × 50
SCALE 1:1 · mm
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CALCULATED · SPEC
AUTO-COMPUTED
wi × hi
16 × 16mm
Inner size
A
144.0mm²
Section area
V
7200mm³
Volume
HOW-TO
How to generate a square pipe STEP / STL file
- 1Enter outer width and height (equal for a square tube).
- 2Enter wall thickness and length.
- 3For a rolled-steel look, add an outer corner radius.
- 4Check the spec cards and any warnings.
- 5Download STEP, STL or 3MF — or send it to Orinovate for a quote.
What is a square pipe?
A square (or rectangular) hollow section is stiff in bending and torsion and easy to join on flat faces — ideal for frames, brackets, furniture and mechanisms. The section is extruded along Z, with inner and outer corner radii keeping a constant wall.
Formulas
Inner size wi = W − 2t, hi = H − 2t; section A = (W·H − (4 − π)R²) − (wi·hi − (4 − π)ri²) with ri = max(R − t, 0); volume V = A·L.
Specs at default parameters
| Parameter | Value | Range |
|---|---|---|
| Outer width (W) | 20 mm | 1–1000 |
| Outer height (H) | 20 mm | 1–1000 |
| Wall thickness (t) | 2 mm | 0.2–200 |
| Length (L) | 50 mm | 0.5–2000 |
| Outer corner radius (R) | 0 mm | 0–200 |
| Inner size (wi × hi) | 16 × 16 mm | — |
| Section area (A) | 144.0 mm² | — |
| Volume (V) | 7200 mm³ | — |
FAQ
What are common square tube sizes?
Steel and aluminium tubes come in 20 × 20 × 1.2, 25 × 25 × 1.6, 30 × 30 × 2, 40 × 20 × 2 mm and so on. Cold-formed steel tube has an outer corner radius of about 1.5–2.5× the wall.
How do I size a plug or sleeve?
A plug's outer size = tube inner size − clearance; for FDM leave 0.15–0.25 mm per side. A sleeve's inner size = tube outer size + clearance.
How do I get section area and weight?
A = outer area − inner area (each corrected by (4 − π)R² for rounded corners); weight = A × L × density — aluminium 2.7 g/cm³, steel 7.85 g/cm³, PLA ≈ 1.24 g/cm³.
Which software opens the square pipe STEP file?
STEP (AP214) opens in Fusion 360, SolidWorks, FreeCAD, Onshape and Rhino. STL / 3MF import directly into Bambu Studio, PrusaSlicer or Cura.
Is it free?
Yes — no sign-up, no fees. Need a physical part? Send it to Orinovate for an instant quote in FDM, SLA, SLS, MJF or CNC.
Related generators
Need a physical part?
Send the model straight to Orinovate's instant quote: FDM, SLA, SLS, MJF, metal printing and CNC, made in Hsinchu, Taiwan.
About STEP / STL / 3MF / DXF
- STEP (.step / .stp, AP214) keeps exact dimensions and surfaces for editing in Fusion 360, SolidWorks or FreeCAD.
- STL and 3MF are triangle meshes that import directly into Bambu Studio, PrusaSlicer or Cura.
- DXF is the top-view 2D outline, ready for laser cutting, waterjet or CNC routing.
- All models are in millimetres at true scale.