Pipe Crosses
NUMET ALLOYS manufactures heavy-duty pipe crosses engineered for multi-directional fluid distribution and converging flow systems. Featuring four precision-machined openings, our crosses eliminate the need for complex tee-assemblies, providing a highly space-efficient, high-integrity junction for dividing or mixing fluids in critical industrial applications.
Detailed Technical Specifications
Reducing Cross: The two branch outlets have a smaller diameter than the main run.
Stainless Steel: ASTM A403 WP304/304L, WP316/316L, WP321, WP347
Alloy & High Nickel: ASTM A234 WP5, WP9, WP11, WP22, Inconel, Monel, Duplex
Welded (ERW/SAW): 24" NB to 48" NB (100% Radiography/X-Ray Tested)
Dimensions (ASME B16.9)
ASME B16.9 tabulates crosses together with tees: a straight cross takes the same centre-to-end dimensions as a straight tee of the same size, and a reducing outlet cross takes the same dimensions as the reducing outlet tee of the same run and outlet combination.
Straight (Equal) Crosses — Centre-to-End C and M
ASME B16.9| SizeNPS | Outside Dia.mm | Outside Dia.inch | Run C = Outlet Mmm | Run C = Outlet Minch |
|---|---|---|---|---|
| 1/2 | 21.3 | 0.840 | 25 | 1.00 |
| 3/4 | 26.7 | 1.050 | 29 | 1.12 |
| 1 | 33.4 | 1.315 | 38 | 1.50 |
| 1-1/4 | 42.2 | 1.660 | 48 | 1.88 |
| 1-1/2 | 48.3 | 1.900 | 57 | 2.25 |
| 2 | 60.3 | 2.375 | 64 | 2.50 |
| 2-1/2 | 73.0 | 2.875 | 76 | 3.00 |
| 3 | 88.9 | 3.500 | 86 | 3.38 |
| 3-1/2 | 101.6 | 4.000 | 95 | 3.75 |
| 4 | 114.3 | 4.500 | 105 | 4.12 |
| 5 | 141.3 | 5.563 | 124 | 4.88 |
| 6 | 168.3 | 6.625 | 143 | 5.62 |
| 8 | 219.1 | 8.625 | 178 | 7.00 |
| 10 | 273.1 | 10.750 | 216 | 8.50 |
| 12 | 323.9 | 12.750 | 254 | 10.00 |
| 14 | 355.6 | 14.000 | 279 | 11.00 |
| 16 | 406.4 | 16.000 | 305 | 12.00 |
| 18 | 457.2 | 18.000 | 343 | 13.50 |
| 20 | 508.0 | 20.000 | 381 | 15.00 |
| 22 | 558.8 | 22.000 | 419 | 16.50 |
| 24 | 609.6 | 24.000 | 432 | 17.00 |
All four ends of a straight cross are the same size, so the run and outlet dimensions are equal.
Reducing Outlet Crosses — Run C and Outlet M
ASME B16.9| Sizerun × outlet | Run Cmm | Outlet Mmm |
|---|---|---|
| 3/4 × 1/2 | 29 | 29 |
| 1 × 1/2 | 38 | 38 |
| 1 × 3/4 | 38 | 38 |
| 1-1/4 × 1/2 | 48 | 48 |
| 1-1/4 × 3/4 | 48 | 48 |
| 1-1/4 × 1 | 48 | 48 |
| 1-1/2 × 1/2 | 57 | 57 |
| 1-1/2 × 3/4 | 57 | 57 |
| 1-1/2 × 1 | 57 | 57 |
| 1-1/2 × 1-1/4 | 57 | 57 |
| 2 × 3/4 | 64 | 44 |
| 2 × 1 | 64 | 51 |
| 2 × 1-1/4 | 64 | 57 |
| 2 × 1-1/2 | 64 | 60 |
| 2-1/2 × 1-1/4 | 76 | 57 |
| 2-1/2 × 1-1/2 | 76 | 64 |
| 2-1/2 × 2 | 76 | 70 |
| 3 × 1-1/4 | 86 | 70 |
| 3 × 1-1/2 | 86 | 73 |
| 3 × 2 | 86 | 76 |
| 3 × 2-1/2 | 86 | 83 |
| 3-1/2 × 1-1/2 | 95 | 79 |
| 3-1/2 × 2 | 95 | 83 |
| 3-1/2 × 2-1/2 | 95 | 89 |
| 3-1/2 × 3 | 95 | 92 |
| 4 × 1-1/2 | 105 | 86 |
| 4 × 2 | 105 | 89 |
| 4 × 2-1/2 | 105 | 95 |
| 4 × 3 | 105 | 98 |
| 4 × 3-1/2 | 105 | 102 |
| 5 × 2 | 124 | 105 |
| 5 × 2-1/2 | 124 | 108 |
| 5 × 3 | 124 | 111 |
| 5 × 3-1/2 | 124 | 114 |
| 5 × 4 | 124 | 117 |
| 6 × 2-1/2 | 143 | 121 |
| 6 × 3 | 143 | 124 |
| 6 × 3-1/2 | 143 | 127 |
| 6 × 4 | 143 | 130 |
| 6 × 5 | 143 | 137 |
| 8 × 3-1/2 | 178 | 152 |
| 8 × 4 | 178 | 156 |
| 8 × 5 | 178 | 162 |
| 8 × 6 | 178 | 168 |
| 10 × 4 | 216 | 184 |
| 10 × 5 | 216 | 191 |
| 10 × 6 | 216 | 194 |
| 10 × 8 | 216 | 203 |
| 12 × 5 | 254 | 216 |
| 12 × 6 | 254 | 219 |
| 12 × 8 | 254 | 229 |
| 12 × 10 | 254 | 241 |
| 14 × 6 | 279 | 238 |
| 14 × 8 | 279 | 248 |
| 14 × 10 | 279 | 257 |
| 14 × 12 | 279 | 270 |
| 16 × 6 | 305 | 264 |
| 16 × 8 | 305 | 273 |
| 16 × 10 | 305 | 283 |
| 16 × 12 | 305 | 295 |
| 16 × 14 | 305 | 305 |
| 18 × 8 | 343 | 298 |
| 18 × 10 | 343 | 308 |
| 18 × 12 | 343 | 321 |
| 18 × 14 | 343 | 330 |
| 18 × 16 | 343 | 330 |
| 20 × 8 | 381 | 324 |
| 20 × 10 | 381 | 333 |
| 20 × 12 | 381 | 346 |
| 20 × 14 | 381 | 356 |
| 20 × 16 | 381 | 356 |
| 20 × 18 | 381 | 368 |
| 22 × 10 | 419 | 359 |
| 22 × 12 | 419 | 371 |
| 22 × 14 | 419 | 381 |
| 22 × 16 | 419 | 381 |
| 22 × 18 | 419 | 394 |
| 22 × 20 | 419 | 406 |
| 24 × 10 | 432 | 384 |
| 24 × 12 | 432 | 397 |
| 24 × 14 | 432 | 406 |
| 24 × 16 | 432 | 406 |
| 24 × 18 | 432 | 419 |
| 24 × 20 | 432 | 432 |
| 24 × 22 | 432 | 432 |
How to read a reducing fitting: the run dimension C is the same as a straight fitting of the run size and does not change with the outlet. The outlet dimension M is tabulated for each run and outlet combination — it is not half of C and it cannot be interpolated, so always read it from the table. Sizes are called out run × run × outlet. Values are given in millimetres, the primary units of the standard. Straight crosses are commonly held in stock; reducing crosses are generally manufactured to order.
Dimensions are nominal values from the referenced standard and are shown for reference only; tolerances apply as specified in the standard. Sizes above 24" NB and non-standard combinations are manufactured to order. For certified drawings against your line list, contact our technical team.
Core Advantages
Space & Weld Reduction
Replaces the need to weld multiple tee fittings together. This dramatically reduces the pipeline's footprint and cuts the number of weld joints by half, significantly lowering the risk of leaks.
Balanced Flow Distribution
Engineered with perfectly symmetrical 90-degree branches, allowing for smooth dividing or mixing of fluids from multiple lines into a single central manifold.
High-Stress Junction Integrity
Because a 4-way intersection acts as a natural stress concentrator, our crosses feature reinforced wall thickness at the crotch areas to safely withstand multidirectional thermal expansion.