Reducing Tee
Product Description
Connects a main line to a smaller branch line, eliminating the need for a separate reducer. Saves space and reduces weld joints.
Manufactured by cold forming or hot forging, followed by heat treatment where required, per ASME B16.9 dimensional tolerances. Available in Schedule 10 through XXS wall thicknesses.
Applications
Reducing tees combine a branch connection with a size reduction in a single forged fitting, eliminating the separate reducer weld. They are widely used in process industries where a small-bore branch draws flow from a larger main header — for example, connecting an instrument loop, a sampling station, or a small utility line from a refinery process header sized up to NPS 48.
Typical installations include pump suction branch-offs from large cooling water mains, chemical injection takeoffs from production headers, steam tracing connections on distribution lines, and HVAC air handling unit branch drops. The integrated design reduces welding count, leak points, and installation labor compared to a tee plus separate eccentric reducer.
Carbon steel WPB reducing tees handle steam, oil, and condensate from -29°C to 425°C. Stainless WP304/WP316 grades serve corrosive chemical feed lines, food and beverage process distribution, and seawater injection piping. Branch sizes range from NPS 1/4″ up to 36″ for heavy industrial applications.
Quality Assurance & Certification
Reducing tees are forged or extruded to ASME B16.9 dimensional tolerances, with the branch bore stepped down to the specified size. The junction area is ultrasonically checked for wall thickness consistency. EN 10204 3.1 material certificates accompany each shipment with heat analysis and mechanical test data.
NDT options include radiography on branch seams, ultrasonic wall verification, and liquid penetrant examination on stainless surfaces. For critical services, third-party inspection by BV, SGS, or TUV can witness pressure testing and dimensional hold points before release to shipment.
Bevel ends are capped with plastic protectors; carbon steel units receive rust-preventive coating. Packing follows export standards in wooden crates, with each tee labeled by run size, branch size, schedule, material grade, heat number, and ASME B16.9 compliance.
ASME Standard Data
This fitting is manufactured to ASME B16.9-2018, Factory-Made Wrought Buttwelding Fittings. This Standard covers overall dimensions, tolerances, ratings, testing, and markings for factory-made wrought buttwelding fittings in sizes NPS 1/2 through NPS 48 (DN 15 through DN 1200).
1. Scope and Size Range
This Standard covers overall dimensions, tolerances, ratings, testing, and markings for factory-made wrought buttwelding fittings in sizes NPS 1/2 through NPS 48 (DN 15 through DN 1200).
2. Units Policy — SI and U.S. Customary Must Not Be Mixed
This Standard states values in both SI (Metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text and tables, the U.S. Customary units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard.
3. NPS–DN Relationship
DN/NPS: 15=1/2, 20=3/4, 25=1, 32=1-1/4, 40=1-1/2, 50=2, 65=2-1/2, 80=3, 100=4. NOTE: For NPS > 4, DN = 25 × NPS.
4. Materials — ASME B16.9 Table 5-1 Material Groupings
Wrought fittings covered by this Standard shall be in accordance with ASTM A234, A403, A420, A815, B361, B363, B366, or the corresponding specification in ASME BPVC Section II. The term “wrought” denotes fittings made of pipe, tubing, plate, or forgings.
| Group No. | Material | ASTM / ASME Specification |
|---|---|---|
| Group 1 | Carbon and low-alloy steels | ASTM A234/A234M, ASTM A420/A420M |
| Group 2 | Austenitic and duplex stainless steels | ASTM A403/A403M, ASTM A815/A815M |
| Group 3 | Nickel alloys | ASTM B366/B366M |
| Group 4 | Aluminum alloys | ASTM B361 |
| Group 5 | Titanium alloys | ASTM B363 |
Source: ASME B16.9-2018, Table 5-1 Material Groupings (corpus lines 674-676; OCR-recovered mapping, verified against standard group order).
5. Marking and WP / Special-Fitting Certification
Each fitting shall be permanently marked to show: (a) manufacturer’s name or trademark; (b) material identification, either the ASTM or ASME grade designation; (c) schedule number or nominal wall thickness in mm; (d) size — the NPS identification number related to the end connections; (e) compliance — see para. 4.4. A manufacturer may supplement these mandatory markings with others, including a DN size designation, but confusion shall be avoided.
Standard fittings: certified by prefix “WP”. Special fittings: certified by supplementary suffix: “S58” of ASTM A960 applies for A234, A403, A420; “S8” for A815; “SPLD” for B361, B363, B366.
6. Dimensional Tables — Reducing Outlet Tees (ASME B16.9-2024 Table 6.1-8)
Center-to-end C (run) and M (outlet) for reducing outlet tees and crosses, from NPS 1/2×1/2×3/8 up to 48×48×22 (213 size combinations). Table split into two sections for readability.
Jump to: Run NPS 1/2–12 · Run NPS 14–48
6.1 Run NPS 1/2 – 12 (52 combinations)
| Nominal Pipe Size (Run × Run × Outlet) | Run OD | Outlet OD | Run C | Outlet M |
|---|---|---|---|---|
| 1 × 1 × 3/4 | 33.40 mm (1.32 in.) | 26.70 mm (1.05 in.) | 38 mm (1.50 in.) | 38 mm (1.50 in.) |
| 1 × 1 × 1/2 | 33.40 mm (1.32 in.) | 21.30 mm (0.84 in.) | 38 mm (1.50 in.) | 38 mm (1.50 in.) |
| 1-1/4 × 1-1/4 × 1 | 42.20 mm (1.66 in.) | 33.40 mm (1.32 in.) | 48 mm (1.88 in.) | 48 mm (1.88 in.) |
| 1-1/4 × 1-1/4 × 3/4 | 42.20 mm (1.66 in.) | 26.70 mm (1.05 in.) | 48 mm (1.88 in.) | 48 mm (1.88 in.) |
| 1-1/4 × 1-1/4 × 1/2 | 42.20 mm (1.66 in.) | 21.30 mm (0.84 in.) | 48 mm (1.88 in.) | 48 mm (1.88 in.) |
| 1-1/2 × 1-1/2 × 1-1/4 | 48.30 mm (1.90 in.) | 42.20 mm (1.66 in.) | 57 mm (2.25 in.) | 57 mm (2.25 in.) |
| 1-1/2 × 1-1/2 × 1 | 48.30 mm (1.90 in.) | 33.40 mm (1.32 in.) | 57 mm (2.25 in.) | 57 mm (2.25 in.) |
| 1-1/2 × 1-1/2 × 3/4 | 48.30 mm (1.90 in.) | 26.70 mm (1.05 in.) | 57 mm (2.25 in.) | 57 mm (2.25 in.) |
| 1-1/2 × 1-1/2 × 1/2 | 48.30 mm (1.90 in.) | 21.30 mm (0.84 in.) | 57 mm (2.25 in.) | 57 mm (2.25 in.) |
| 2 × 2 × 1-1/2 | 60.30 mm (2.38 in.) | 48.30 mm (1.90 in.) | 64 mm (2.50 in.) | 60 mm (2.38 in.) |
| 2 × 2 × 1-1/4 | 60.30 mm (2.38 in.) | 42.20 mm (1.66 in.) | 64 mm (2.50 in.) | 57 mm (2.25 in.) |
| 2 × 2 × 1 | 60.30 mm (2.38 in.) | 33.40 mm (1.32 in.) | 64 mm (2.50 in.) | 51 mm (2 in.) |
| 2 × 2 × 3/4 | 60.30 mm (2.38 in.) | 26.70 mm (1.05 in.) | 64 mm (2.50 in.) | 44 mm (1.75 in.) |
| 2-1/2 × 2-1/2 × 2 | 73 mm (2.88 in.) | 60.30 mm (2.38 in.) | 76 mm (3 in.) | 70 mm (2.75 in.) |
| 2-1/2 × 2-1/2 × 1-1/2 | 73 mm (2.88 in.) | 48.30 mm (1.90 in.) | 76 mm (3 in.) | 67 mm (2.62 in.) |
| 2-1/2 × 2-1/2 × 1-1/4 | 73 mm (2.88 in.) | 42.20 mm (1.66 in.) | 76 mm (3 in.) | 64 mm (2.50 in.) |
| 2-1/2 × 2-1/2 × 1 | 73 mm (2.88 in.) | 33.40 mm (1.32 in.) | 76 mm (3 in.) | 57 mm (2.25 in.) |
| 3 × 3 × 2-1/2 | 88.90 mm (3.50 in.) | 73 mm (2.88 in.) | 86 mm (3.38 in.) | 83 mm (3.25 in.) |
| 3 × 3 × 2 | 88.90 mm (3.50 in.) | 60.30 mm (2.38 in.) | 86 mm (3.38 in.) | 76 mm (3 in.) |
| 3 × 3 × 1-1/2 | 88.90 mm (3.50 in.) | 48.30 mm (1.90 in.) | 86 mm (3.38 in.) | 73 mm (2.88 in.) |
| 3 × 3 × 1-1/4 | 88.90 mm (3.50 in.) | 42.20 mm (1.66 in.) | 86 mm (3.38 in.) | 70 mm (2.75 in.) |
| 3-1/2 × 3-1/2 × 3 | 101.60 mm (4 in.) | 88.90 mm (3.50 in.) | 95 mm (3.75 in.) | 92 mm (3.62 in.) |
| 3-1/2 × 3-1/2 × 2-1/2 | 101.60 mm (4 in.) | 73 mm (2.88 in.) | 95 mm (3.75 in.) | 89 mm (3.50 in.) |
| 3-1/2 × 3-1/2 × 2 | 101.60 mm (4 in.) | 60.30 mm (2.38 in.) | 95 mm (3.75 in.) | 83 mm (3.25 in.) |
| 3-1/2 × 3-1/2 × 1-1/2 | 101.60 mm (4 in.) | 48.30 mm (1.90 in.) | 95 mm (3.75 in.) | 79 mm (3.12 in.) |
| 4 × 4 × 3-1/2 | 114.30 mm (4.50 in.) | 101.60 mm (4 in.) | 105 mm (4.12 in.) | 102 mm (4 in.) |
| 4 × 4 × 3 | 114.30 mm (4.50 in.) | 88.90 mm (3.50 in.) | 105 mm (4.12 in.) | 98 mm (3.88 in.) |
| 4 × 4 × 2-1/2 | 114.30 mm (4.50 in.) | 73 mm (2.88 in.) | 105 mm (4.12 in.) | 95 mm (3.75 in.) |
| 4 × 4 × 2 | 114.30 mm (4.50 in.) | 60.30 mm (2.38 in.) | 105 mm (4.12 in.) | 89 mm (3.50 in.) |
| 4 × 4 × 1-1/2 | 114.30 mm (4.50 in.) | 48.30 mm (1.90 in.) | 105 mm (4.12 in.) | 86 mm (3.38 in.) |
| 5 × 5 × 4 | 141.30 mm (5.56 in.) | 114.30 mm (4.50 in.) | 124 mm (4.88 in.) | 117 mm (4.62 in.) |
| 5 × 5 × 3-1/2 | 141.30 mm (5.56 in.) | 101.60 mm (4 in.) | 124 mm (4.88 in.) | 114 mm (4.50 in.) |
| 5 × 5 × 3 | 141.30 mm (5.56 in.) | 88.90 mm (3.50 in.) | 124 mm (4.88 in.) | 111 mm (4.38 in.) |
| 5 × 5 × 2-1/2 | 141.30 mm (5.56 in.) | 73 mm (2.88 in.) | 124 mm (4.88 in.) | 108 mm (4.25 in.) |
| 5 × 5 × 2 | 141.30 mm (5.56 in.) | 60.30 mm (2.38 in.) | 124 mm (4.88 in.) | 105 mm (4.12 in.) |
| 6 × 6 × 5 | 168.30 mm (6.62 in.) | 141.30 mm (5.56 in.) | 143 mm (5.62 in.) | 137 mm (5.38 in.) |
| 6 × 6 × 4 | 168.30 mm (6.62 in.) | 114.30 mm (4.50 in.) | 143 mm (5.62 in.) | 130 mm (5.12 in.) |
| 6 × 6 × 3-1/2 | 168.30 mm (6.62 in.) | 101.60 mm (4 in.) | 143 mm (5.62 in.) | 127 mm (5 in.) |
| 6 × 6 × 3 | 168.30 mm (6.62 in.) | 88.90 mm (3.50 in.) | 143 mm (5.62 in.) | 124 mm (4.88 in.) |
| 6 × 6 × 2-1/2 | 168.30 mm (6.62 in.) | 73 mm (2.88 in.) | 143 mm (5.62 in.) | 121 mm (4.75 in.) |
| 8 × 8 × 6 | 219.10 mm (8.62 in.) | 168.30 mm (6.62 in.) | 178 mm (7 in.) | 168 mm (6.62 in.) |
| 8 × 8 × 5 | 219.10 mm (8.62 in.) | 141.30 mm (5.56 in.) | 178 mm (7 in.) | 162 mm (6.38 in.) |
| 8 × 8 × 4 | 219.10 mm (8.62 in.) | 114.30 mm (4.50 in.) | 178 mm (7 in.) | 156 mm (6.12 in.) |
| 8 × 8 × 3-1/2 | 219.10 mm (8.62 in.) | 101.60 mm (4 in.) | 178 mm (7 in.) | 152 mm (6 in.) |
| 10 × 10 × 8 | 273 mm (10.75 in.) | 219.10 mm (8.62 in.) | 216 mm (8.50 in.) | 203 mm (8 in.) |
| 10 × 10 × 6 | 273 mm (10.75 in.) | 168.30 mm (6.62 in.) | 216 mm (8.50 in.) | 194 mm (7.62 in.) |
| 10 × 10 × 5 | 273 mm (10.75 in.) | 141.30 mm (5.56 in.) | 216 mm (8.50 in.) | 191 mm (7.50 in.) |
| 10 × 10 × 4 | 273 mm (10.75 in.) | 114.30 mm (4.50 in.) | 216 mm (8.50 in.) | 184 mm (7.25 in.) |
| 12 × 12 × 10 | 323.80 mm (12.75 in.) | 273 mm (10.75 in.) | 254 mm (10 in.) | 241 mm (9.50 in.) |
| 12 × 12 × 8 | 323.80 mm (12.75 in.) | 219.10 mm (8.62 in.) | 254 mm (10 in.) | 229 mm (9 in.) |
| 12 × 12 × 6 | 323.80 mm (12.75 in.) | 168.30 mm (6.62 in.) | 254 mm (10 in.) | 219 mm (8.62 in.) |
| 12 × 12 × 5 | 323.80 mm (12.75 in.) | 141.30 mm (5.56 in.) | 254 mm (10 in.) | 216 mm (8.50 in.) |
6.2 Run NPS 14 – 48 (161 combinations)
| Nominal Pipe Size (Run × Run × Outlet) | Run OD | Outlet OD | Run C | Outlet M |
|---|---|---|---|---|
| 1/2 × 1/2 × 3/8 | 21.30 mm (0.84 in.) | 17.30 mm (0.68 in.) | 25 mm (1 in.) | 25 mm (1 in.) |
| 1/2 × 1/2 × 1/4 | 21.30 mm (0.84 in.) | 13.70 mm (0.54 in.) | 25 mm (1 in.) | 25 mm (1 in.) |
| 3/4 × 3/4 × 1/2 | 26.70 mm (1.05 in.) | 21.30 mm (0.84 in.) | 29 mm (1.12 in.) | 29 mm (1.12 in.) |
| 3/4 × 3/4 × 3/8 | 26.70 mm (1.05 in.) | 17.30 mm (0.68 in.) | 29 mm (1.12 in.) | 29 mm (1.12 in.) |
| 14 × 14 × 12 | 355.60 mm (14 in.) | 323.80 mm (12.75 in.) | 279 mm (11 in.) | 270 mm (10.62 in.) |
| 14 × 14 × 10 | 355.60 mm (14 in.) | 273 mm (10.75 in.) | 279 mm (11 in.) | 257 mm (10.12 in.) |
| 14 × 14 × 8 | 355.60 mm (14 in.) | 219.10 mm (8.62 in.) | 279 mm (11 in.) | 248 mm (9.75 in.) |
| 14 × 14 × 6 | 355.60 mm (14 in.) | 168.30 mm (6.62 in.) | 279 mm (11 in.) | 238 mm (9.38 in.) |
| 16 × 16 × 14 | 406.40 mm (16 in.) | 355.60 mm (14 in.) | 305 mm (12 in.) | 305 mm (12 in.) |
| 16 × 16 × 12 | 406.40 mm (16 in.) | 323.80 mm (12.75 in.) | 305 mm (12 in.) | 295 mm (11.62 in.) |
| 16 × 16 × 10 | 406.40 mm (16 in.) | 273 mm (10.75 in.) | 305 mm (12 in.) | 283 mm (11.12 in.) |
| 16 × 16 × 8 | 406.40 mm (16 in.) | 219.10 mm (8.62 in.) | 305 mm (12 in.) | 273 mm (10.75 in.) |
| 16 × 16 × 6 | 406.40 mm (16 in.) | 168.30 mm (6.62 in.) | 305 mm (12 in.) | 264 mm (10.38 in.) |
| 18 × 18 × 16 | 457 mm (18 in.) | 406.40 mm (16 in.) | 343 mm (13.50 in.) | 330 mm (13 in.) |
| 18 × 18 × 14 | 457 mm (18 in.) | 355.60 mm (14 in.) | 343 mm (13.50 in.) | 330 mm (13 in.) |
| 18 × 18 × 12 | 457 mm (18 in.) | 323.80 mm (12.75 in.) | 343 mm (13.50 in.) | 321 mm (12.62 in.) |
| 18 × 18 × 10 | 457 mm (18 in.) | 273 mm (10.75 in.) | 343 mm (13.50 in.) | 308 mm (12.12 in.) |
| 18 × 18 × 8 | 457 mm (18 in.) | 219.10 mm (8.62 in.) | 343 mm (13.50 in.) | 298 mm (11.75 in.) |
| 20 × 20 × 18 | 508 mm (20 in.) | 457 mm (18 in.) | 381 mm (15 in.) | 368 mm (14.50 in.) |
| 20 × 20 × 16 | 508 mm (20 in.) | 406.40 mm (16 in.) | 381 mm (15 in.) | 356 mm (14 in.) |
| 20 × 20 × 14 | 508 mm (20 in.) | 355.60 mm (14 in.) | 381 mm (15 in.) | 356 mm (14 in.) |
| 20 × 20 × 12 | 508 mm (20 in.) | 323.80 mm (12.75 in.) | 381 mm (15 in.) | 346 mm (13.62 in.) |
| 20 × 20 × 10 | 508 mm (20 in.) | 273 mm (10.75 in.) | 381 mm (15 in.) | 333 mm (13.12 in.) |
| 20 × 20 × 8 | 508 mm (20 in.) | 219.10 mm (8.62 in.) | 381 mm (15 in.) | 324 mm (12.75 in.) |
| 22 × 22 × 20 | 559 mm (22 in.) | 508 mm (20 in.) | 419 mm (16.50 in.) | 406 mm (16 in.) |
| 22 × 22 × 18 | 559 mm (22 in.) | 457 mm (18 in.) | 419 mm (16.50 in.) | 394 mm (15.50 in.) |
| 22 × 22 × 16 | 559 mm (22 in.) | 406.40 mm (16 in.) | 419 mm (16.50 in.) | 381 mm (15 in.) |
| 22 × 22 × 14 | 559 mm (22 in.) | 355.60 mm (14 in.) | 419 mm (16.50 in.) | 381 mm (15 in.) |
| 22 × 22 × 12 | 559 mm (22 in.) | 323.80 mm (12.75 in.) | 419 mm (16.50 in.) | 371 mm (14.62 in.) |
| 22 × 22 × 10 | 559 mm (22 in.) | 273 mm (10.75 in.) | 419 mm (16.50 in.) | 359 mm (14.12 in.) |
| 24 × 24 × 22 | 610 mm (24 in.) | 559 mm (22 in.) | 432 mm (17 in.) | 432 mm (17 in.) |
| 24 × 24 × 20 | 610 mm (24 in.) | 508 mm (20 in.) | 432 mm (17 in.) | 432 mm (17 in.) |
| 24 × 24 × 18 | 610 mm (24 in.) | 457 mm (18 in.) | 432 mm (17 in.) | 419 mm (16.50 in.) |
| 24 × 24 × 16 | 610 mm (24 in.) | 406.40 mm (16 in.) | 432 mm (17 in.) | 406 mm (16 in.) |
| 24 × 24 × 14 | 610 mm (24 in.) | 355.60 mm (14 in.) | 432 mm (17 in.) | 406 mm (16 in.) |
| 24 × 24 × 12 | 610 mm (24 in.) | 323.80 mm (12.75 in.) | 432 mm (17 in.) | 397 mm (15.62 in.) |
| 24 × 24 × 10 | 610 mm (24 in.) | 273 mm (10.75 in.) | 432 mm (17 in.) | 384 mm (15.12 in.) |
| 26 × 26 × 24 | 660 mm (26 in.) | 610 mm (24 in.) | 495 mm (19.50 in.) | 483 mm (19 in.) |
| 26 × 26 × 22 | 660 mm (26 in.) | 559 mm (22 in.) | 495 mm (19.50 in.) | 470 mm (18.50 in.) |
| 26 × 26 × 20 | 660 mm (26 in.) | 508 mm (20 in.) | 495 mm (19.50 in.) | 457 mm (18 in.) |
| 26 × 26 × 18 | 660 mm (26 in.) | 457 mm (18 in.) | 495 mm (19.50 in.) | 444 mm (17.50 in.) |
| 26 × 26 × 16 | 660 mm (26 in.) | 406.40 mm (16 in.) | 495 mm (19.50 in.) | 432 mm (17 in.) |
| 26 × 26 × 14 | 660 mm (26 in.) | 355.60 mm (14 in.) | 495 mm (19.50 in.) | 432 mm (17 in.) |
| 26 × 26 × 12 | 660 mm (26 in.) | 323.80 mm (12.75 in.) | 495 mm (19.50 in.) | 422 mm (16.62 in.) |
| 28 × 28 × 26 | 711 mm (28 in.) | 660 mm (26 in.) | 521 mm (20.50 in.) | 521 mm (20.50 in.) |
| 28 × 28 × 24 | 711 mm (28 in.) | 610 mm (24 in.) | 521 mm (20.50 in.) | 508 mm (20 in.) |
| 28 × 28 × 22 | 711 mm (28 in.) | 559 mm (22 in.) | 521 mm (20.50 in.) | 495 mm (19.50 in.) |
| 28 × 28 × 20 | 711 mm (28 in.) | 508 mm (20 in.) | 521 mm (20.50 in.) | 483 mm (19 in.) |
| 28 × 28 × 18 | 711 mm (28 in.) | 457 mm (18 in.) | 521 mm (20.50 in.) | 470 mm (18.50 in.) |
| 28 × 28 × 16 | 711 mm (28 in.) | 406.40 mm (16 in.) | 521 mm (20.50 in.) | 457 mm (18 in.) |
| 28 × 28 × 14 | 711 mm (28 in.) | 355.60 mm (14 in.) | 521 mm (20.50 in.) | 457 mm (18 in.) |
| 28 × 28 × 12 | 711 mm (28 in.) | 323.80 mm (12.75 in.) | 521 mm (20.50 in.) | 448 mm (17.62 in.) |
| 30 × 30 × 28 | 762 mm (30 in.) | 711 mm (28 in.) | 559 mm (22 in.) | 546 mm (21.50 in.) |
| 30 × 30 × 26 | 762 mm (30 in.) | 660 mm (26 in.) | 559 mm (22 in.) | 546 mm (21.50 in.) |
| 30 × 30 × 24 | 762 mm (30 in.) | 610 mm (24 in.) | 559 mm (22 in.) | 533 mm (21 in.) |
| 30 × 30 × 22 | 762 mm (30 in.) | 559 mm (22 in.) | 559 mm (22 in.) | 521 mm (20.50 in.) |
| 30 × 30 × 20 | 762 mm (30 in.) | 508 mm (20 in.) | 559 mm (22 in.) | 508 mm (20 in.) |
| 30 × 30 × 18 | 762 mm (30 in.) | 457 mm (18 in.) | 559 mm (22 in.) | 495 mm (19.50 in.) |
| 30 × 30 × 16 | 762 mm (30 in.) | 406.40 mm (16 in.) | 559 mm (22 in.) | 483 mm (19 in.) |
| 30 × 30 × 14 | 762 mm (30 in.) | 355.60 mm (14 in.) | 559 mm (22 in.) | 483 mm (19 in.) |
| 30 × 30 × 12 | 762 mm (30 in.) | 323.80 mm (12.75 in.) | 559 mm (22 in.) | 473 mm (18.62 in.) |
| 30 × 30 × 10 | 762 mm (30 in.) | 273 mm (10.75 in.) | 559 mm (22 in.) | 460 mm (18.12 in.) |
| 32 × 32 × 30 | 813 mm (32 in.) | 762 mm (30 in.) | 597 mm (23.50 in.) | 584 mm (23 in.) |
| 32 × 32 × 28 | 813 mm (32 in.) | 711 mm (28 in.) | 597 mm (23.50 in.) | 572 mm (22.50 in.) |
| 32 × 32 × 26 | 813 mm (32 in.) | 660 mm (26 in.) | 597 mm (23.50 in.) | 572 mm (22.50 in.) |
| 32 × 32 × 24 | 813 mm (32 in.) | 610 mm (24 in.) | 597 mm (23.50 in.) | 559 mm (22 in.) |
| 32 × 32 × 22 | 813 mm (32 in.) | 559 mm (22 in.) | 597 mm (23.50 in.) | 546 mm (21.50 in.) |
| 32 × 32 × 20 | 813 mm (32 in.) | 508 mm (20 in.) | 597 mm (23.50 in.) | 533 mm (21 in.) |
| 32 × 32 × 18 | 813 mm (32 in.) | 457 mm (18 in.) | 597 mm (23.50 in.) | 521 mm (20.50 in.) |
| 32 × 32 × 16 | 813 mm (32 in.) | 406.40 mm (16 in.) | 597 mm (23.50 in.) | 508 mm (20 in.) |
| 32 × 32 × 14 | 813 mm (32 in.) | 355.60 mm (14 in.) | 597 mm (23.50 in.) | 508 mm (20 in.) |
| 34 × 34 × 32 | 864 mm (34 in.) | 813 mm (32 in.) | 635 mm (25 in.) | 622 mm (24.50 in.) |
| 34 × 34 × 30 | 864 mm (34 in.) | 762 mm (30 in.) | 635 mm (25 in.) | 610 mm (24 in.) |
| 34 × 34 × 28 | 864 mm (34 in.) | 711 mm (28 in.) | 635 mm (25 in.) | 597 mm (23.50 in.) |
| 34 × 34 × 26 | 864 mm (34 in.) | 660 mm (26 in.) | 635 mm (25 in.) | 597 mm (23.50 in.) |
| 34 × 34 × 24 | 864 mm (34 in.) | 610 mm (24 in.) | 635 mm (25 in.) | 584 mm (23 in.) |
| 34 × 34 × 22 | 864 mm (34 in.) | 559 mm (22 in.) | 635 mm (25 in.) | 572 mm (22.50 in.) |
| 34 × 34 × 20 | 864 mm (34 in.) | 508 mm (20 in.) | 635 mm (25 in.) | 559 mm (22 in.) |
| 34 × 34 × 18 | 864 mm (34 in.) | 457 mm (18 in.) | 635 mm (25 in.) | 546 mm (21.50 in.) |
| 34 × 34 × 16 | 864 mm (34 in.) | 406.40 mm (16 in.) | 635 mm (25 in.) | 533 mm (21 in.) |
| 36 × 36 × 34 | 914 mm (36 in.) | 864 mm (34 in.) | 673 mm (26.50 in.) | 660 mm (26 in.) |
| 36 × 36 × 32 | 914 mm (36 in.) | 813 mm (32 in.) | 673 mm (26.50 in.) | 648 mm (25.50 in.) |
| 36 × 36 × 30 | 914 mm (36 in.) | 762 mm (30 in.) | 673 mm (26.50 in.) | 635 mm (25 in.) |
| 36 × 36 × 28 | 914 mm (36 in.) | 711 mm (28 in.) | 673 mm (26.50 in.) | 622 mm (24.50 in.) |
| 36 × 36 × 26 | 914 mm (36 in.) | 660 mm (26 in.) | 673 mm (26.50 in.) | 622 mm (24.50 in.) |
| 36 × 36 × 24 | 914 mm (36 in.) | 610 mm (24 in.) | 673 mm (26.50 in.) | 610 mm (24 in.) |
| 36 × 36 × 22 | 914 mm (36 in.) | 559 mm (22 in.) | 673 mm (26.50 in.) | 597 mm (23.50 in.) |
| 36 × 36 × 20 | 914 mm (36 in.) | 508 mm (20 in.) | 673 mm (26.50 in.) | 584 mm (23 in.) |
| 36 × 36 × 18 | 914 mm (36 in.) | 457 mm (18 in.) | 673 mm (26.50 in.) | 572 mm (22.50 in.) |
| 36 × 36 × 16 | 914 mm (36 in.) | 406.40 mm (16 in.) | 673 mm (26.50 in.) | 559 mm (22 in.) |
| 38 × 38 × 36 | 965 mm (38 in.) | 914 mm (36 in.) | 711 mm (28 in.) | 711 mm (28 in.) |
| 38 × 38 × 34 | 965 mm (38 in.) | 864 mm (34 in.) | 711 mm (28 in.) | 698 mm (27.50 in.) |
| 38 × 38 × 32 | 965 mm (38 in.) | 813 mm (32 in.) | 711 mm (28 in.) | 686 mm (27 in.) |
| 38 × 38 × 30 | 965 mm (38 in.) | 762 mm (30 in.) | 711 mm (28 in.) | 673 mm (26.50 in.) |
| 38 × 38 × 28 | 965 mm (38 in.) | 711 mm (28 in.) | 711 mm (28 in.) | 648 mm (25.50 in.) |
| 38 × 38 × 26 | 965 mm (38 in.) | 660 mm (26 in.) | 711 mm (28 in.) | 648 mm (25.50 in.) |
| 38 × 38 × 24 | 965 mm (38 in.) | 610 mm (24 in.) | 711 mm (28 in.) | 635 mm (25 in.) |
| 38 × 38 × 22 | 965 mm (38 in.) | 559 mm (22 in.) | 711 mm (28 in.) | 622 mm (24.50 in.) |
| 38 × 38 × 20 | 965 mm (38 in.) | 508 mm (20 in.) | 711 mm (28 in.) | 610 mm (24 in.) |
| 38 × 38 × 18 | 965 mm (38 in.) | 457 mm (18 in.) | 711 mm (28 in.) | 597 mm (23.50 in.) |
| 40 × 40 × 38 | 1016 mm (40 in.) | 965 mm (38 in.) | 749 mm (29.50 in.) | 749 mm (29.50 in.) |
| 40 × 40 × 36 | 1016 mm (40 in.) | 914 mm (36 in.) | 749 mm (29.50 in.) | 737 mm (29 in.) |
| 40 × 40 × 34 | 1016 mm (40 in.) | 864 mm (34 in.) | 749 mm (29.50 in.) | 724 mm (28.50 in.) |
| 40 × 40 × 32 | 1016 mm (40 in.) | 813 mm (32 in.) | 749 mm (29.50 in.) | 711 mm (28 in.) |
| 40 × 40 × 30 | 1016 mm (40 in.) | 762 mm (30 in.) | 749 mm (29.50 in.) | 698 mm (27.50 in.) |
| 40 × 40 × 28 | 1016 mm (40 in.) | 711 mm (28 in.) | 749 mm (29.50 in.) | 673 mm (26.50 in.) |
| 40 × 40 × 26 | 1016 mm (40 in.) | 660 mm (26 in.) | 749 mm (29.50 in.) | 673 mm (26.50 in.) |
| 40 × 40 × 24 | 1016 mm (40 in.) | 610 mm (24 in.) | 749 mm (29.50 in.) | 660 mm (26 in.) |
| 40 × 40 × 22 | 1016 mm (40 in.) | 559 mm (22 in.) | 749 mm (29.50 in.) | 648 mm (25.50 in.) |
| 40 × 40 × 20 | 1016 mm (40 in.) | 508 mm (20 in.) | 749 mm (29.50 in.) | 635 mm (25 in.) |
| 40 × 40 × 18 | 1016 mm (40 in.) | 457 mm (18 in.) | 749 mm (29.50 in.) | 622 mm (24.50 in.) |
| 42 × 42 × 40 | 1067 mm (42 in.) | 1016 mm (40 in.) | 762 mm (30 in.) | 711 mm (28 in.) |
| 42 × 42 × 38 | 1067 mm (42 in.) | 965 mm (38 in.) | 762 mm (30 in.) | 711 mm (28 in.) |
| 42 × 42 × 36 | 1067 mm (42 in.) | 914 mm (36 in.) | 762 mm (30 in.) | 711 mm (28 in.) |
| 42 × 42 × 34 | 1067 mm (42 in.) | 864 mm (34 in.) | 762 mm (30 in.) | 711 mm (28 in.) |
| 42 × 42 × 32 | 1067 mm (42 in.) | 813 mm (32 in.) | 762 mm (30 in.) | 711 mm (28 in.) |
| 42 × 42 × 30 | 1067 mm (42 in.) | 762 mm (30 in.) | 762 mm (30 in.) | 711 mm (28 in.) |
| 42 × 42 × 28 | 1067 mm (42 in.) | 711 mm (28 in.) | 762 mm (30 in.) | 698 mm (27.50 in.) |
| 42 × 42 × 26 | 1067 mm (42 in.) | 660 mm (26 in.) | 762 mm (30 in.) | 698 mm (27.50 in.) |
| 42 × 42 × 24 | 1067 mm (42 in.) | 610 mm (24 in.) | 762 mm (30 in.) | 660 mm (26 in.) |
| 42 × 42 × 22 | 1067 mm (42 in.) | 559 mm (22 in.) | 762 mm (30 in.) | 660 mm (26 in.) |
| 42 × 42 × 20 | 1067 mm (42 in.) | 508 mm (20 in.) | 762 mm (30 in.) | 660 mm (26 in.) |
| 42 × 42 × 18 | 1067 mm (42 in.) | 457 mm (18 in.) | 762 mm (30 in.) | 648 mm (25.50 in.) |
| 42 × 42 × 16 | 1067 mm (42 in.) | 406.40 mm (16 in.) | 762 mm (30 in.) | 635 mm (25 in.) |
| 44 × 44 × 42 | 1118 mm (44 in.) | 1067 mm (42 in.) | 813 mm (32 in.) | 762 mm (30 in.) |
| 44 × 44 × 40 | 1118 mm (44 in.) | 1016 mm (40 in.) | 813 mm (32 in.) | 749 mm (29.50 in.) |
| 44 × 44 × 38 | 1118 mm (44 in.) | 965 mm (38 in.) | 813 mm (32 in.) | 737 mm (29 in.) |
| 44 × 44 × 36 | 1118 mm (44 in.) | 914 mm (36 in.) | 813 mm (32 in.) | 724 mm (28.50 in.) |
| 44 × 44 × 34 | 1118 mm (44 in.) | 864 mm (34 in.) | 813 mm (32 in.) | 724 mm (28.50 in.) |
| 44 × 44 × 32 | 1118 mm (44 in.) | 813 mm (32 in.) | 813 mm (32 in.) | 711 mm (28 in.) |
| 44 × 44 × 30 | 1118 mm (44 in.) | 762 mm (30 in.) | 813 mm (32 in.) | 711 mm (28 in.) |
| 44 × 44 × 28 | 1118 mm (44 in.) | 711 mm (28 in.) | 813 mm (32 in.) | 698 mm (27.50 in.) |
| 44 × 44 × 26 | 1118 mm (44 in.) | 660 mm (26 in.) | 813 mm (32 in.) | 698 mm (27.50 in.) |
| 44 × 44 × 24 | 1118 mm (44 in.) | 610 mm (24 in.) | 813 mm (32 in.) | 698 mm (27.50 in.) |
| 44 × 44 × 22 | 1118 mm (44 in.) | 559 mm (22 in.) | 813 mm (32 in.) | 686 mm (27 in.) |
| 44 × 44 × 20 | 1118 mm (44 in.) | 508 mm (20 in.) | 813 mm (32 in.) | 686 mm (27 in.) |
| 46 × 46 × 44 | 1168 mm (46 in.) | 1118 mm (44 in.) | 851 mm (33.50 in.) | 800 mm (31.50 in.) |
| 46 × 46 × 42 | 1168 mm (46 in.) | 1067 mm (42 in.) | 851 mm (33.50 in.) | 787 mm (31 in.) |
| 46 × 46 × 40 | 1168 mm (46 in.) | 1016 mm (40 in.) | 851 mm (33.50 in.) | 775 mm (30.50 in.) |
| 46 × 46 × 38 | 1168 mm (46 in.) | 965 mm (38 in.) | 851 mm (33.50 in.) | 762 mm (30 in.) |
| 46 × 46 × 36 | 1168 mm (46 in.) | 914 mm (36 in.) | 851 mm (33.50 in.) | 762 mm (30 in.) |
| 46 × 46 × 34 | 1168 mm (46 in.) | 864 mm (34 in.) | 851 mm (33.50 in.) | 749 mm (29.50 in.) |
| 46 × 46 × 32 | 1168 mm (46 in.) | 813 mm (32 in.) | 851 mm (33.50 in.) | 749 mm (29.50 in.) |
| 46 × 46 × 30 | 1168 mm (46 in.) | 762 mm (30 in.) | 851 mm (33.50 in.) | 737 mm (29 in.) |
| 46 × 46 × 28 | 1168 mm (46 in.) | 711 mm (28 in.) | 851 mm (33.50 in.) | 737 mm (29 in.) |
| 46 × 46 × 26 | 1168 mm (46 in.) | 660 mm (26 in.) | 851 mm (33.50 in.) | 737 mm (29 in.) |
| 46 × 46 × 24 | 1168 mm (46 in.) | 610 mm (24 in.) | 851 mm (33.50 in.) | 724 mm (28.50 in.) |
| 46 × 46 × 22 | 1168 mm (46 in.) | 559 mm (22 in.) | 851 mm (33.50 in.) | 724 mm (28.50 in.) |
| 48 × 48 × 46 | 1219 mm (48 in.) | 1168 mm (46 in.) | 889 mm (35 in.) | 838 mm (33 in.) |
| 48 × 48 × 44 | 1219 mm (48 in.) | 1118 mm (44 in.) | 889 mm (35 in.) | 838 mm (33 in.) |
| 48 × 48 × 42 | 1219 mm (48 in.) | 1067 mm (42 in.) | 889 mm (35 in.) | 813 mm (32 in.) |
| 48 × 48 × 40 | 1219 mm (48 in.) | 1016 mm (40 in.) | 889 mm (35 in.) | 813 mm (32 in.) |
| 48 × 48 × 38 | 1219 mm (48 in.) | 965 mm (38 in.) | 889 mm (35 in.) | 813 mm (32 in.) |
| 48 × 48 × 36 | 1219 mm (48 in.) | 914 mm (36 in.) | 889 mm (35 in.) | 787 mm (31 in.) |
| 48 × 48 × 34 | 1219 mm (48 in.) | 864 mm (34 in.) | 889 mm (35 in.) | 787 mm (31 in.) |
| 48 × 48 × 32 | 1219 mm (48 in.) | 813 mm (32 in.) | 889 mm (35 in.) | 787 mm (31 in.) |
| 48 × 48 × 30 | 1219 mm (48 in.) | 762 mm (30 in.) | 889 mm (35 in.) | 762 mm (30 in.) |
| 48 × 48 × 28 | 1219 mm (48 in.) | 711 mm (28 in.) | 889 mm (35 in.) | 762 mm (30 in.) |
| 48 × 48 × 26 | 1219 mm (48 in.) | 660 mm (26 in.) | 889 mm (35 in.) | 762 mm (30 in.) |
| 48 × 48 × 24 | 1219 mm (48 in.) | 610 mm (24 in.) | 889 mm (35 in.) | 737 mm (29 in.) |
| 48 × 48 × 22 | 1219 mm (48 in.) | 559 mm (22 in.) | 889 mm (35 in.) | 737 mm (29 in.) |
Source: ASME B16.9-2024 Table 6.1-8, pp. 25–30. Run and Outlet outside diameters at bevel shown in mm (in.). Dimensions identical for reducing crosses per Table 6.1-8.
8. Proof Test Coverage — ASME B16.9 Table 9.2.1-1
| Fitting Tested (Proof Test) | Configurations Qualified by This Test |
|---|---|
| 等径三通 (Straight tee) | 任意缩径级别的等径或异径三通 |
| 异径三通 (Reducing tee) | 支口缩径级别相同或更大的异径三通 |
Proof Test Factor f — ASME B16.9 Table 9.3.1-1
| Number of Proof Tests on Same Configuration | Test Factor f |
|---|---|
| 1 | 1.1 |
| 2 | 1.05 |
| Three or more | 1.0 |
P = 2 S f t / D. D = specified outside diameter of pipe; f = test factor from Table 9.3.1-1; S = actual tensile strength of test fitting; t = nominal pipe wall thickness of the pipe the fitting marking identifies.
The fitting shall withstand the minimum calculated pressure for at least 180 s (3 min).
The test shall be conducted with water. Trapped air in the assembly shall be purged prior to the start of the test.
Critical areas are normally the inner radius of elbows, the crotch of tees and crosses, the knuckle radius of caps, and the large ends of reducers.
Source: ASME B16.9-2018. Hydrostatic testing of wrought fittings is not required by this Standard. All fittings shall be capable of withstanding, without leakage or impairment of serviceability, a hydrostatic test pressure required by the applicable piping code for seamless pipe of material equivalent to, and of the size and wall thickness the fitting marking identifies.
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Frequently Asked Questions
Carbon steel A234 WPB, stainless A403 WP304/304L/316/316L, low-temperature A420 WPL6, and alloy steel A234 WP11/WP22 on request.
NPS 1/2″ to 48″, all standard schedules from SCH 10 to XXS. Custom sizes per drawing available with 15–30 day lead time.
Yes — EN 10204 3.1 MTC, material traceability, and third-party inspection (BV / SGS / TUV) upon request.