Guides · Setting up
Laps, swages, seams: where the app puts them
The allowances you set once in Settings, and exactly where they land on every pattern.
Settings, once
| Setting | What the app does with it |
|---|---|
| Lap | One total; half goes each side of the seam line, outside the true girth |
| Swage | Default 3 mm; added at every joint on bends, every mitre on a lobster, every collar on a tee. Never on a plain end |
| Seam | Per fitting, on the 12-point dial. 1 throat, 7 back, 4 side |
| Paper | A4, A3, Letter, Legal, Tabloid; tiled 1:1 with crosshairs |
| Company name | Printed on every template (Pro) |
On the pattern
- Rivet and screw holes sit on the seam lines, both edges, so the rolled piece closes to the exact diameter. Not out in the lap.
- Fold lines dashed, cut line solid, swage lines marked, all in the layer colours the drawing has always used.
- A 100 mm calibration bar on every sheet. If it does not rule 100 mm, the printer scaled it. Do not cut.
Worked to the outside of the lagging
Pipe plus twice the insulation is the cladding diameter, and from there the pipe does not exist. The place it bites is bend radius: a 1D on a heavily lagged pipe can be fine for the pipe and impossible for the cladding, and the app will tell you before it prints.
Saved jobs keep the sizing mode they were made in, so a reopened job prints the same metal.