ASME B16.5
ASTM
ASTM A105 Slip-On Flange Class 150 Dimensions & Weight Chart (ASME B16.5)
Carbon Steel ASTM A105 / A105N · Class 150 · 1/2" to 24"
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) | Flange OD (mm) | Bolt holes | Weight (kg) |
|---|---|---|---|---|---|---|
| 1/2" | 15 | 21.3 | 2.77 | 90 | 4 | 0.3 |
| 3/4" | 20 | 26.7 | 2.87 | 100 | 4 | 0.5 |
| 1" | 25 | 33.4 | 3.38 | 110 | 4 | 0.7 |
| 1-1/4" | 32 | 42.2 | 3.56 | 115 | 4 | 0.8 |
| 1-1/2" | 40 | 48.3 | 3.68 | 125 | 4 | 1 |
| 2" | 50 | 60.3 | 3.91 | 150 | 4 | 1.7 |
| 2-1/2" | 65 | 73 | 5.16 | 180 | 4 | 2.4 |
| 3" | 80 | 88.9 | 5.49 | 190 | 4 | 3 |
| 4" | 100 | 114.3 | 6.02 | 230 | 8 | 4.9 |
| 5" | 125 | 141.3 | 6.55 | 255 | 8 | 6.1 |
| 6" | 150 | 168.3 | 7.11 | 280 | 8 | 8.3 |
| 8" | 200 | 219.1 | 8.18 | 345 | 8 | 13.7 |
| 10" | 250 | 273.1 | 9.27 | 405 | 12 | 20.2 |
| 12" | 300 | 323.9 | 10.31 | 485 | 12 | 30.2 |
| 14" | 350 | 355.6 | 11.13 | 535 | 12 | 37.4 |
| 16" | 400 | 406.4 | 12.7 | 585 | 16 | 49 |
| 18" | 450 | 457.2 | 14.27 | 635 | 16 | 59 |
| 20" | 500 | 508 | 15.09 | 685 | 20 | 70.6 |
| 24" | 600 | 610 | 17.48 | 790 | 20 | 104.4 |
Material data
Chemical composition
- C
- ≤ 0.35 %
- Mn
- 0.60 – 1.05 %
- P
- ≤ 0.035 %
- S
- ≤ 0.040 %
- Si
- ≤ 0.35 %
Mechanical properties
- Tensile strength
- ≥ 485 MPa (70 ksi)
- Yield strength
- ≥ 250 MPa (36 ksi)
- Elongation
- ≥ 22 % (in 50 mm)
Manufacturing & quality assurance
Yanshan Hengzhenyuan Pipeline — integrated forming, heat treatment, machining and NDT for export utility and EPC programs.
Production capability
- Forged or plate slip-on flanges per ASME B16.5 Class 150
- Bore matches listed NPS/SCH for fillet weld to pipe
- RF 1/16" facing standard; FF or RTJ on inquiry
- Cost-effective alternative to weld neck for lower cyclic loads
Inspection & release
- Flange OD, bore and hub fillet prep inspection
- PMI per heat; dimensional report vs B16.5
- MT on weld prep surfaces when required
- EN 10204 3.1 certificates for export
Engineering FAQ
The pipe passes through the bore and is fillet welded at hub and inside. Weld neck uses a butt weld to the pipe end; choose per line class and stress.
Flange OD and bolt circle for Class 150 RF are the same family per B16.5; hub geometry and weight differ by type.
Yes. Specify NPS and schedule on the inquiry for correct bore ID.
Yes on inquiry. See Class 300 WN chart or request SO 300# on the MTO.
Quick RFQ
Include quantity, delivery port and required certificates. We respond with mill pricing and lead time.