For ASME B16.5 socket weld flanges, we record class rating, socket bore, facing and material before releasing the quotation.
| Standard / Type | Product | Typical scope |
|---|---|---|
| Type | SWRF / SWRTJ | Facing and groove by order |
| Bore | Socket / step bore | Available drawing linked to the item |
| Class rating | 150 to 2500 | By ASME B16.5 requirement |
| NPS | OD in | Thickness in | Bolt circle in | Holes | Hole dia. in | Approx. lb |
|---|---|---|---|---|---|---|
| 1/2" | 3.5 | 0.44 | 2.38 | 4 | 0.62 | 1 |
| 3/4" | 3.88 | 0.5 | 2.75 | 4 | 0.62 | 2 |
| 1" | 4.25 | 0.56 | 3.12 | 4 | 0.62 | 2 |
| 1 1/2" | 5 | 0.69 | 3.88 | 4 | 0.62 | 3 |
| 2" | 6 | 0.75 | 4.75 | 4 | 0.75 | 5 |
| 3" | 7.5 | 0.94 | 6 | 4 | 0.75 | 8 |
| 4" | 9 | 0.94 | 7.5 | 8 | 0.75 | 13 |
| 6" | 11 | 1 | 9.5 | 8 | 0.88 | 19 |
| 8" | 13.5 | 1.12 | 11.75 | 8 | 0.88 | 30 |
| 10" | 16 | 1.19 | 14.25 | 12 | 1 | 43 |
| 12" | 19 | 1.25 | 17 | 12 | 1 | 64 |
| 16" | 23.5 | 1.44 | 21.25 | 16 | 1.12 | 98 |
| 20" | 27.5 | 1.69 | 25 | 20 | 1.25 | 165 |
| 24" | 32 | 1.88 | 29.5 | 20 | 1.38 | 220 |
| NPS | OD in | Thickness in | Bolt circle in | Holes | Hole dia. in | Approx. lb |
|---|---|---|---|---|---|---|
| 1/2" | 3.75 | 0.56 | 2.62 | 4 | 0.62 | 2 |
| 3/4" | 4.62 | 0.62 | 3.25 | 4 | 0.75 | 3 |
| 1" | 4.88 | 0.69 | 3.5 | 4 | 0.75 | 3 |
| 1 1/2" | 6.12 | 0.81 | 4.5 | 4 | 0.88 | 6 |
| 2" | 6.5 | 0.88 | 5 | 8 | 0.75 | 7 |
| 3" | 8.25 | 1.12 | 6.62 | 8 | 0.88 | 13 |
| 4" | 10 | 1.25 | 7.88 | 8 | 0.88 | 22 |
| 6" | 12.5 | 1.44 | 10.62 | 12 | 0.88 | 39 |
| 8" | 15 | 1.62 | 13 | 12 | 1 | 58 |
| 10" | 17.5 | 1.88 | 15.25 | 16 | 1.12 | 81 |
| 12" | 20.5 | 2 | 17.75 | 16 | 1.25 | 115 |
| 16" | 25.5 | 2.25 | 22.5 | 20 | 1.38 | 190 |
| 20" | 30.5 | 2.5 | 27 | 24 | 1.38 | 315 |
| 24" | 36 | 2.75 | 32 | 24 | 1.62 | 475 |
| NPS | OD in | Thickness in | Bolt circle in | Holes | Hole dia. in | Approx. lb |
|---|---|---|---|---|---|---|
| 1/2" | 3.75 | 0.56 | 2.62 | 4 | 0.62 | 2 |
| 3/4" | 4.62 | 0.62 | 3.25 | 4 | 0.75 | 3 |
| 1" | 4.88 | 0.69 | 3.5 | 4 | 0.75 | 4 |
| 1 1/2" | 6.12 | 0.88 | 4.5 | 4 | 0.88 | 7 |
| 2" | 6.5 | 1 | 5 | 8 | 0.75 | 9 |
| 3" | 8.25 | 1.25 | 6.62 | 8 | 0.88 | 16 |
| 4" | 10.75 | 1.5 | 8.5 | 8 | 1 | 37 |
| 6" | 14 | 1.88 | 11.5 | 12 | 1.12 | 80 |
| 8" | 16.5 | 2.19 | 13.75 | 12 | 1.25 | 115 |
| 10" | 20 | 2.5 | 17 | 16 | 1.38 | 170 |
| 12" | 22 | 2.62 | 19.25 | 20 | 1.38 | 200 |
| 16" | 27 | 3 | 23.75 | 20 | 1.62 | 330 |
| 20" | 32 | 3.5 | 28.5 | 24 | 1.75 | 510 |
| 24" | 37 | 4 | 33 | 24 | 2 | 730 |
| NPS | OD in | Thickness in | Bolt circle in | Holes | Hole dia. in | Approx. lb |
|---|---|---|---|---|---|---|
| 1/2" | 4.75 | 0.88 | 3.25 | 4 | 0.88 | 4 |
| 3/4" | 5.12 | 1 | 3.5 | 4 | 0.88 | 5 |
| 1" | 5.88 | 1.12 | 4 | 4 | 1 | 8 |
| 1 1/2" | 7 | 1.25 | 4.88 | 4 | 1.12 | 12 |
| 2" | 8.5 | 1.5 | 6.5 | 8 | 1 | 25 |
| 3" | 10.5 | 1.88 | 8 | 8 | 1.25 | 48 |
| 4" | 12.25 | 2.12 | 9.5 | 8 | 1.38 | 73 |
| 6" | 15.5 | 3.25 | 12.5 | 12 | 1.5 | 165 |
| 8" | 19 | 3.62 | 15.5 | 12 | 1.75 | 260 |
| 10" | 23 | 4.25 | 19 | 12 | 2 | 435 |
| 12" | 26.5 | 4.88 | 22.5 | 16 | 2.12 | 580 |
| 16" | 32.5 | 5.75 | 27.75 | 16 | 2.62 | Confirm |
| 20" | 38.75 | 7 | 32.75 | 16 | 3.12 | Confirm |
| 24" | 46 | 8 | 39 | 16 | 3.62 | Confirm |
Use these tables for RFQ preparation. Final production should be confirmed against the required standard edition, drawing, material grade and certificate requirement.
Confirm SWRF or SWRTJ facing, step bore details, NPS size, class, material and certificate requirements.
Socket weld flanges are commonly reviewed for small-bore pressure piping where bore and fit-up details matter.
Our technical team compares the requested standard edition and project drawing, then releases the applicable dimensions to production.
We record the Class, RF, FF or RTJ facing, bore or pipe schedule and tolerance notes on each ASME quotation line.
Flange type, sealing face, drilling, thickness and machining details are checked together so production and inspection use the same specification.
Our order file carries the agreed EN 10204 3.1, PED, AD 2000, UKCA, PMI, NDT and third-party inspection scope through to shipment.
Send the ASME B16.5 flange type, NPS, Class, facing, bore or pipe schedule, material grade, quantity and certificate requirement.
