Butt-weld equal tee dimensions: ASME B16.9 and EN 10253-1
Centre-to-end dimensions of our equal tees, 2" to 8", in both standards, with overall run length, wall and weight.
Reading tee dimensions
Dimension C runs from the centre of the tee to the plane of a run end, dimension M from the centre to the outlet. On an equal tee all three outlets share the same size and C = M. Our EN 10253-1 sheets call it F.
ASME B16.9 equal tees
In A234 WPB, painted, 2" to 8".
| NPS | OD D (mm) | C = M (mm) | Run 2 × C (mm) |
|---|---|---|---|
| 2" | 60.3 | 64 | 128 |
| 2½" | 73.0 | 76 | 152 |
| 3" | 88.9 | 86 | 172 |
| 4" | 114.3 | 105 | 210 |
| 5" | 141.3 | 124 | 248 |
| 6" | 168.3 | 143 | 286 |
| 8" | 219.1 | 178 | 356 |
Equal tees to ASME B16.9: C (run) and M (outlet) are centre-to-end. Tolerance ± 2 mm.
EN 10253-1 equal tees
In S235, black or galvanized, 60.3 to 219.1 mm.
| NPS | OD D (mm) | F (mm) | Wall T (mm) | Weight (kg) |
|---|---|---|---|---|
| 2" | 60.3 | 64 | 2.9 | 1.10 |
| 2½" | 76.1 | 76 | 2.9 | 1.50 |
| 3" | 88.9 | 86 | 3.2 | 2.20 |
| 4" | 114.3 | 105 | 3.6 | 4.30 |
| 5" | 139.7 | 124 | 4.0 | 6.20 |
| 6" | 168.3 | 143 | 4.5 | 9.00 |
| 8" | 219.1 | 178 | 6.3 | 19.70 |
Equal tees to EN 10253-1, in S235: F is centre-to-face, the same on all three outlets.
What changes between the standards
For the same size the centre-to-end is the same: 64 mm at 2", 105 mm at 4", 178 mm at 8". Only the outside diameters differ at 2½" (76.1 in EN, 73.0 in ASME) and 5" (139.7 versus 141.3): choose the tee in the series of your pipe.
For a branch smaller than the line, combine an equal tee with a concentric reducer on the outlet. Reducing tees are made to drawing.
Dimensions by size
Standards
- ASME B16.9: equal tees, dimensions and tolerances.
- EN 10253-1: non-alloy steel equal tees.
Frequently asked questions
How long is a 4" equal tee?
210 mm between run faces (2 × 105 mm), in both standards.
Are C and M always equal?
On an equal tee, yes. On a reducing tee, M to the outlet differs.
Do you make reducing tees?
To drawing. As standard we offer an equal tee plus a reducer.
Other charts
Butt-weld elbow dimensions: ASME B16.9 and EN 10253-1An elbow’s take-off is its centre-to-end: from the bend centre to the plane of the end.
Butt-weld reducer dimensions: ASME B16.9 and EN 10253-1Under ASME B16.9, length H depends on the large end only: 102 mm for any 4" reducer.
Butt-weld cap and dished end dimensions: ASME B16.9 and EN 10253-1ASME B16.9 caps measure 25 mm (½") to 102 mm (8"); above a limiting wall the length becomes E1.