Butt weld reducer joining two different pipe diameters on a common axis. Preferred on vertical lines.
| Standard | ASME B16.9 / MSS SP-43 |
|---|---|
| Size range | 3/4" × 1/2" – 48" × 42" |
| Wall thickness | SCH 10S–160, STD, XS, XXS |
| Material | ASTM A234 WPB/WPC, A403 WP304/316, A420 WPL6 |
Selection and ordering notes
A butt weld fitting keeps the bore continuous, which lowers pressure drop and turbulence and allows the weld to be fully inspected. It is selected in the same material grade and schedule as the pipe.
State size, schedule, material grade and standard together; PMI reports can be requested for alloy items. See when to use a flanged connection for the details.
Butt weld reducer joining two different pipe diameters on a common axis. Preferred on vertical lines.
Dimensions and tolerances are given in the original drawing and table on the technical document tab. Material certificates (EN 10204 3.1 / 3.2) and inspection reports are supplied with the order file.
Dimension table
| Size | Length H | STD kg | XS kg |
|---|---|---|---|
| 3/4" × 1/2" | 38,1 | 0,07 | 0,1 |
| 1" × 1/2" | 50,8 | 0,14 | 0,18 |
| 1" × 3/4" | 50,8 | 0,14 | 0,18 |
| 1 1/4" × 1/2" | 50,8 | 0,18 | 0,23 |
| 1 1/4" × 3/4" | 50,8 | 0,18 | 0,23 |
| 1 1/4" × 1" | 50,8 | 0,18 | 0,23 |
| 1 1/2" × 1/2" | 63,5 | 0,27 | 0,32 |
| 1 1/2" × 3/4" | 63,5 | 0,27 | 0,32 |
| 1 1/2" × 1" | 63,5 | 0,27 | 0,32 |
| 1 1/2" × 1 1/4" | 63,5 | 0,27 | 0,32 |
| 2" × 1/2" | 76,2 | 0,41 | 0,54 |
| 2" × 3/4" | 76,2 | 0,41 | 0,54 |
| 2" × 1" | 76,2 | 0,41 | 0,54 |
| 2" × 1 1/4" | 76,2 | 0,41 | 0,54 |
| 2" × 1 1/2" | 76,2 | 0,41 | 0,54 |
| 2 1/2" × 1" | 88,9 | 0,68 | 0,91 |
| 2 1/2" × 1 1/4" | 88,9 | 0,68 | 0,91 |
| 2 1/2" × 1 1/2" | 88,9 | 0,68 | 0,91 |
| 2 1/2" × 2" | 88,9 | 0,68 | 0,91 |
| 3" × 1 1/2" | 88,9 | 0,77 | 1,09 |
| 3" × 2" | 88,9 | 0,91 | 1,22 |
| 3" × 2 1/2" | 88,9 | 0,91 | 1,27 |
| 4" × 1 1/2" | 101,6 | 1,36 | 1,91 |
| 4" × 2" | 101,6 | 1,4 | 1,95 |
| 4" × 2 1/2" | 101,6 | 1,45 | 2,04 |
| 4" × 3" | 101,6 | 1,59 | 2,08 |
| 5" × 3" | 127,0 | 2,5 | 3,4 |
| 5" × 4" | 127,0 | 2,7 | 3,8 |
| 6" × 2" | 140,0 | 3,4 | 4,3 |
| 6" × 2 1/2" | 140,0 | 3,4 | 4,5 |
| 6" × 3" | 140,0 | 3,6 | 4,8 |
| 6" × 4" | 140,0 | 3,7 | 5,2 |
| 6" × 5" | 140,0 | 3,9 | 5,4 |
| 8" × 3" | 152,4 | 4,5 | 7,2 |
| 8" × 4" | 152,4 | 5 | 7,7 |
| 8" × 5" | 152,4 | 5,4 | 8,2 |
| 8" × 6" | 152,4 | 5,9 | 8,6 |
| 10" × 4" | 178,0 | 9,1 | 11,8 |
| 10" × 5" | 178,0 | 9,5 | 13,6 |
| 10" × 6" | 178,0 | 9,5 | 13,6 |
| 10" × 8" | 178,0 | 10,0 | 14,0 |
| 12" × 6" | 203,0 | 14,1 | 18,1 |
| 12" × 8" | 203,0 | 14,5 | 19,1 |
| 12" × 10" | 203,0 | 15,4 | 20,0 |
| 14" × 8" | 330,0 | 26,3 | 34,9 |
| 14" × 10" | 330,0 | 27,2 | 36,3 |
| 14" × 12" | 330,0 | 28,6 | 37,6 |
| 16" × 8" | 356,0 | 31,8 | 42,6 |
| 16" × 10" | 356,0 | 33,1 | 43,5 |
| 16" × 12" | 356,0 | 34,5 | 45,4 |
| 16" × 14" | 356,0 | 35,4 | 46,3 |
| 18" × 10" | 381,0 | 38,0 | 52,1 |
| 18" × 12" | 381,0 | 39,0 | 53,5 |
| 18" × 14" | 381,0 | 40,0 | 54,9 |
| 18" × 16" | 381,0 | 40,8 | 53,5 |
| 20" × 10" | 508,0 | 53,0 | 79,9 |
| 20" × 12" | 508,0 | 54,4 | 82,0 |
| 20" × 14" | 508,0 | 57,6 | 80,2 |
| 20" × 16" | 508,0 | 58,9 | 82,0 |
| 20" × 18" | 508,0 | 61,7 | 82,0 |
| 24" × 12" | 508,0 | 63,5 | 84,4 |
| 24" × 14" | 508,0 | 65,3 | 86,8 |
| 24" × 16" | 508,0 | 68,0 | 90,4 |
| 24" × 18" | 508,0 | 72,6 | 96,5 |
| 24" × 20" | 508,0 | 77,1 | 102,5 |
| The length (H) is the same for concentric and eccentric reducers. | |||
