Buttwelding Straight Tees and Crosses are used for branch connection of same size as that of a header. ASME B16.9 Table 7 provides dimensions for size range ½” to 48”. To reduce size of inventory crosses are sparingly used. In place of a cross, two tees are normally used. Crosses are used only when there is a space constraint such as in marine applications or revamp work. This page provides metric dimensions for buttwelding straight tees and crosses.
Available dimensions are : OD | Outside Diameter at the Bevel, C | Center to End Run length, M | Center to End Outlet Length.
| NPS | OD | C | M |
|---|---|---|---|
| 1/2 | 21.3 | 25 | 25 |
| 3/4 | 26.7 | 29 | 29 |
| 1 | 33.4 | 38 | 38 |
| 1-1/4 | 42.2 | 48 | 48 |
| 1-1/2 | 48.3 | 57 | 57 |
| 2 | 60.3 | 64 | 64 |
| 2-1/2 | 73.0 | 76 | 76 |
| 3 | 88.9 | 86 | 86 |
| 3-1/2 | 101.6 | 95 | 95 |
| 4 | 114.3 | 105 | 105 |
| 5 | 141.3 | 124 | 124 |
| 6 | 168.3 | 143 | 143 |
| 8 | 219.1 | 178 | 178 |
| 10 | 273.0 | 216 | 216 |
| 12 | 323.8 | 254 | 254 |
| 14 | 355.6 | 279 | 279 |
| 16 | 406.4 | 305 | 305 |
| 18 | 457.0 | 343 | 343 |
| 20 | 508.0 | 381 | 381 |
| 22 | 559.0 | 419 | 419 |
| 24 | 610.0 | 432 | 432 |
| 26 | 660.0 | 495 | 495 |
| 28 | 711.0 | 521 | 521 |
| 30 | 762.0 | 559 | 559 |
| 32 | 813.0 | 597 | 597 |
| 34 | 864.0 | 635 | 635 |
| 36 | 914.0 | 673 | 673 |
| 38 | 965.0 | 711 | 711 |
| 40 | 1016.0 | 749 | 749 |
| 42 | 1067.0 | 762 | 711 |
| 44 | 1118.0 | 813 | 762 |
| 46 | 1168.0 | 851 | 800 |
| 48 | 1219.0 | 889 | 838 |
GENERAL NOTE:
All dimensions are in millimeters.
NOTES:
(1) Outlet dimension M for NPS 26 and larger is recommended
but not required.
(2) Dimensions applicable to crosses NPS 24 and smaller.
