90° Tee layout
Enter insulation jacket ODs, not nominal pipe size. Works for equal or unequal tees: enter the same OD twice for equal.
Inputs
Pick from chart
Pick from chart
Where the seam lands on the branch
Type an OD, or pick one from the chart under each box. Sizes read pipe × wall, so 4×1 is 4" pipe with 1" insulation; ⅛ sizes are copper tube. Bold is 1" wall. ODs from the Knauf Earthwool 1000° chart, in inches. Other brands can differ slightly.
0Branch circumference
0Mark spacing (16 marks)
0Deepest cut
Layout by station
| Stn | Depth 1/16" | Decimal | Angle |
|---|
Pattern, to scale
Laid flat as cut on the jacket. Width is the branch circumference, depth is the cut, both at the same scale. Marks are spaced evenly; the orange mark is your lap.