ASME B16.9
ASTM
ASTM A234 WPB Concentric Reducer Dimensions & Weight Chart (ASME B16.9 SCH 40)
Carbon Steel ASTM A234 WPB · SCH 40 / STD · 1/2" to 24" (large end)
Dimensions & weight table
Reference values for layout and freight estimates. Confirm critical dimensions against the latest ASME edition and your project ITP before procurement.
| NPS | DN | OD (mm) | Wall (mm) | C / A (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1/2" | 15 | 21.3 | 2.77 | 51 | 0.21 |
| 3/4" | 20 | 26.7 | 2.87 | 51 | 0.24 |
| 1" | 25 | 33.4 | 3.38 | 51 | 0.27 |
| 1-1/4" | 32 | 42.2 | 3.56 | 51 | 0.31 |
| 1-1/2" | 40 | 48.3 | 3.68 | 51 | 0.36 |
| 2" | 50 | 60.3 | 3.91 | 76 | 0.42 |
| 2-1/2" | 65 | 73 | 5.16 | 76 | 0.51 |
| 3" | 80 | 88.9 | 5.49 | 89 | 0.6 |
| 4" | 100 | 114.3 | 6.02 | 102 | 0.72 |
| 5" | 125 | 141.3 | 6.55 | 127 | 0.87 |
| 6" | 150 | 168.3 | 7.11 | 140 | 1.02 |
| 8" | 200 | 219.1 | 8.18 | 152 | 1.32 |
| 10" | 250 | 273.1 | 9.27 | 178 | 1.62 |
| 12" | 300 | 323.9 | 10.31 | 203 | 1.92 |
| 14" | 350 | 355.6 | 11.13 | 229 | 2.22 |
| 16" | 400 | 406.4 | 12.7 | 254 | 2.52 |
| 18" | 450 | 457.2 | 14.27 | 279 | 2.82 |
| 20" | 500 | 508 | 15.09 | 305 | 3.12 |
| 24" | 600 | 610 | 17.48 | 356 | 3.72 |
Material data
Chemical composition
- C
- ≤ 0.30 %
- Mn
- 0.29 – 1.06 %
- P
- ≤ 0.050 %
- S
- ≤ 0.058 %
- Si
- ≥ 0.10 %
Mechanical properties
- Tensile strength
- ≥ 415 MPa (60 ksi)
- Yield strength
- ≥ 240 MPa (35 ksi)
- Elongation
- ≥ 30 % (in 50 mm)
Manufacturing & quality assurance
Yanshan Hengzhenyuan Pipeline — integrated forming, heat treatment, machining and NDT for export utility and EPC programs.
Production capability
- Concentric reducers per ASME B16.9; seamless or welded construction
- Hot-forming of large OD transitions; heat treatment per WPB
- Beveled large and small ends per ASME B16.25
- Common one-step reductions stocked for export spools
Inspection & release
- End-to-end H and end OD inspection; PMI per heat
- NDE on welds per project ITP
- Dye penetrant on critical transitions when specified
- EN 10204 3.1 and third-party witness available
Engineering FAQ
The listed NPS and OD refer to the large (run) end. Small end size follows the common one-step reduction for that line class—confirm both ends on the isometric when ordering.
Yes. See the eccentric reducer chart; flat side orientation must be shown on the drawing or MTO.
H is the overall end-to-end length of the concentric reducer per ASME B16.9, used for pipe rack layout and shipping volume estimates.
Yes. Specify SCH 80 on both ends or mismatched schedules if the line list requires it.
Quick RFQ
Include quantity, delivery port and required certificates. We respond with mill pricing and lead time.