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Pipe template

Pipe & Tube Notching
Coping Template

Free pipe and tube notching template generator. Enter the main and branch diameters, the branch angle and offset — get the fish mouth pattern for the branch pipe and the main pipe hole template at true 1:1 scale, with ordinates for manual layout.

How it works
  • 90° tees and 20–90° laterals
  • Equal, reducing and offset branches
  • Branch saddle and hole templates
  • Ordinates for manual layout

How it works

1

Enter dimensions

Main and branch diameters, branch height from the main pipe axis, the branch angle and an optional sideways offset.

2

Pick a template

"Pattern" holds both flat templates: A — the saddle for cutting the branch pipe, B — the cut-out in the main pipe; pick a part to show or print it alone. "3D view" lets you check the joint.

3

Print & mark

Print at 100% scale, wrap it around the pipe, line up the seam and trace the cut line. No printer — plot the ordinates at each station.

Frequently asked questions

For the branch pattern the usual practice is the branch outside diameter and the main pipe inside diameter, since the cut sits on the main pipe inner wall. For thin-wall pipe the difference is negligible and outside diameters are fine. The distance along the branch axis from the main pipe axis to the branch end. Every generatrix length on the pattern is derived from it, so it must exceed the highest point of the intersection line. The offset shifts the branch axis sideways from the main pipe axis (eccentric or tangential branch). The branch radius plus the offset cannot exceed the main pipe radius. Yes — enter the same diameter for both pipes. The intersection becomes a saddle with sharp points at the sides and the hole reaches its maximum size. Divide the pipe circumference into the given number of stations, draw a line along the pipe at each and mark the length printed on the template. Join the points with a smooth curve — that is the cut line. On the branch pattern the left and right edges are station 0, which lies in the plane of both axes on the heel side. On the hole template the seam sits on the underside of the main pipe, opposite the hole. The template shows the geometric cut line. Enter both wall thicknesses under «Walls» and the cut is taken on the right wall surfaces. A root gap and a weld bevel are not included — add them after cutting.

Need a different template or some help?

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