Pipe Wraparound Template Ordinates

Markback ordinate table for wrapping a template to scribe an angled pipe cut.

Run the calculator

Formula and source

For a plane cut at angle alpha from square, longitudinal offset at circumferential station phi: y(phi) = (OD/2) * tan(alpha) * (1 - cos(phi)), phi over 0..360 in equal stations; circumference = pi*OD; max ordinate = OD*tan(alpha).

The pipefitter's wraparound (ordinate) method for marking an angled pipe cut, y = (OD/2)*tan(alpha)*(1 - cos(phi)), as taught in NCCER Pipefitting and the standard layout references, by name; first-principles geometry.

Audience

This tile is built for plumbers and the adjacent professions in the Cross-Trade Utilities group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tools

Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.