ASME B16.9
ASTM
ASTM A234 WPB Eccentric 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 | 0.24 |
| 3/4" | 20 | 26.7 | 2.87 | 51 | 0.27 |
| 1" | 25 | 33.4 | 3.38 | 51 | 0.3 |
| 1-1/4" | 32 | 42.2 | 3.56 | 51 | 0.35 |
| 1-1/2" | 40 | 48.3 | 3.68 | 51 | 0.4 |
| 2" | 50 | 60.3 | 3.91 | 76 | 0.47 |
| 2-1/2" | 65 | 73 | 5.16 | 76 | 0.56 |
| 3" | 80 | 88.9 | 5.49 | 89 | 0.66 |
| 4" | 100 | 114.3 | 6.02 | 102 | 0.79 |
| 5" | 125 | 141.3 | 6.55 | 127 | 0.95 |
| 6" | 150 | 168.3 | 7.11 | 140 | 1.12 |
| 8" | 200 | 219.1 | 8.18 | 152 | 1.44 |
| 10" | 250 | 273.1 | 9.27 | 178 | 1.77 |
| 12" | 300 | 323.9 | 10.31 | 203 | 2.09 |
| 14" | 350 | 355.6 | 11.13 | 229 | 2.42 |
| 16" | 400 | 406.4 | 12.7 | 254 | 2.74 |
| 18" | 450 | 457.2 | 14.27 | 279 | 3.07 |
| 20" | 500 | 508 | 15.09 | 305 | 3.39 |
| 24" | 600 | 610 | 17.48 | 356 | 4.04 |
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
- Eccentric reducers per ASME B16.9 for pump suction and drain layouts
- Flat side orientation marked per isometric (FUP/FOP/flat bottom)
- Seamless or welded; heat treatment per WPB grade
- Beveled ends per ASME B16.25 for field fit-up
Inspection & release
- Flat-side orientation verified against spool drawing
- H length and end OD dimensional report
- PMI and NDE per ITP on welds
- Mill certificates 3.1 for export batches
Engineering FAQ
Eccentric reducers keep the flat side continuous with the bottom of horizontal pipe runs to avoid air pockets or drain traps, common on pump suction and gravity lines.
Mark FUP (flat up), FOP (flat out), or flat bottom on the isometric or MTO. Fabrication will align the flat per the drawing.
Overall length H is similar for the same large/small NPS pair, but centerlines offset. This table lists large-end NPS and reference H for layout.
Any B16.9 combination can be quoted with large end, small end, schedule and orientation on the inquiry.
Quick RFQ
Include quantity, delivery port and required certificates. We respond with mill pricing and lead time.