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Pipe Miter / Coping Template Generator

Generate printable wrap-around cutting templates for pipe miters, saddle cuts, and branch connections per PFI ES-1

Free pipe miter template generator for pipefitters, welders, and fabrication shop workers. Enter the pipe OD (or nominal size), wall thickness, miter angle, and number of segments to generate a printable wrap-around template. Supports single miter cuts (elbows), multi-segment miters (segmented bends), saddle-on-pipe intersections (branch connections), and lateral entries at any angle. Print the template, wrap it around the pipe, mark the cut line, and cut with a torch, plasma, or bandsaw. The template accounts for pipe OD and wall thickness, it's based on the actual outside surface where you mark, not the centerline.

Pro Tip: Print at exactly 100% scale, do not use "fit to page" or "shrink to fit." After printing, verify the template by checking the total width against the pipe circumference (π × OD). If it doesn't match within 1/16", your printer is scaling. Use the built-in verification strip that prints alongside the template. For critical welds, add 1/16" to 1/8" material for grinding and fit-up by enabling the weld prep allowance.

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Pipe Miter Cut Template Generator
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How It Works

  1. Select the Cut Type

    Choose from single miter (a straight angled cut), multi-segment miter (2-5 segments to form a bend), saddle/branch (a hole cut in the header pipe), or lateral entry (branch at an angle other than 90°).

  2. Enter Pipe Dimensions

    Enter the pipe size by nominal diameter (the calculator looks up the OD) or enter the OD directly for non-standard pipe. For saddle/branch connections, enter both the header and branch pipe sizes.

  3. Set the Angle

    For miter cuts, enter the cut angle (measured from the pipe axis, so 45° makes a 90° elbow when two pieces are joined). For branches, enter the branch angle (90° for a standard tee, other angles for lateral connections).

  4. Print and Wrap

    Print the template at 100% scale. Cut it out along the edges, wrap it tightly around the pipe with the ends meeting, and tape it in place. Mark along the template edge with soapstone or a scribe, then cut. The verification strip confirms correct print scaling.

Built For

  • Pipefitters cutting miter joints for field-routed piping where standard fittings aren't available or practical
  • Welders fabricating segmented elbows from straight pipe for large-diameter or non-standard radius bends
  • Fabrication shops cutting saddle templates for branch connections on headers and manifolds
  • Maintenance pipefitters making field repairs by cutting in branch connections on existing piping systems
  • Trade school instructors teaching students how miter geometry translates to flat template patterns

Assumptions

  • Pipe outside diameter matches the published nominal dimensions per ASME B36.10M (carbon steel) or B36.19M (stainless steel).
  • The template is printed at exactly 100% scale without any printer scaling or margin adjustments.
  • The pipe is round and straight, out-of-round pipe or bent pipe will not match the template precisely.

References

  • PFI Standard ES-1, Pipe Fabrication Institute: Minimum Length and Spacing for Welded Nozzles
  • Audel's Pipefitters and Welders Pocket Manual, Miter and saddle template geometry
  • IPT's Pipe Trades Manual, Template development for pipe intersections
  • ASME B31.3, Process Piping, Chapter III: miter bend geometry limitations

Frequently Asked Questions

The mathematical template is exact. Accuracy in practice depends entirely on print scaling. Most laser printers reproduce at 100% scale within 0.5% if you disable "fit to page." The built-in verification strip lets you check: measure the printed strip length and compare it to the pipe circumference (π × OD). If they match within 1/16" for pipes under 12", the template is good. For large pipes or critical work, plot on a wide-format plotter for better accuracy.
Instead of bending pipe (which requires a bending machine and can thin the wall), you can create a bend by joining multiple short mitered segments. A 90° bend made from 3 cuts (2 intermediate cuts + 2 end cuts) is called a "3-piece elbow" or "lobster back." More segments create a smoother bend with better flow characteristics. The trade-off is more welding. ASME B31.3 allows segmented miters in many process piping applications with specific geometry limitations.
The template wraps around the outside of the pipe, so it's based on the outside diameter (OD), not the inside. Wall thickness doesn't change the cutting template itself. However, for weld prep purposes, thicker walls require a bevel (typically 37.5° for ASME groove welds), and you may want to add a small material allowance for grinding the bevel after cutting. The tool includes an optional weld prep allowance for this.
A saddle cut (also called a cope or fish-mouth) is the contour cut on the end of a branch pipe so it sits flush against the curved surface of a header pipe. The cut line is a complex curve that depends on both pipe diameters and the intersection angle. You need a saddle template whenever you're welding a pipe branch onto a pipe header without a factory fitting, common in structural tubing, handrail fabrication, and field piping modifications.
Disclaimer: Templates are mathematically generated for the specified geometry. Actual fit depends on pipe dimensional tolerances, print accuracy, and marking/cutting precision. Always verify print scale before cutting. For pressure piping applications, miter joints must comply with the applicable piping code (ASME B31.1, B31.3, etc.) including limitations on miter angle, segment count, and pressure rating.

Learn More

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