| NPS | Outside Diameter at Bevel (mm) | OD (inch) | 90° LR Center-to-End A (mm) | 45° LR Center-to-End B (mm) |
|---|---|---|---|---|
| 1/2" | 21.3 | 0.84 | 38 | 16 |
| 3/4" | 26.7 | 1.05 | 38 | 19 |
| 1" | 33.4 | 1.32 | 38 | 22 |
| 1-1/4" | 42.2 | 1.66 | 48 | 25 |
| 1-1/2" | 48.3 | 1.90 | 57 | 29 |
| 2" | 60.3 | 2.38 | 76 | 35 |
| 2-1/2" | 73.0 | 2.88 | 95 | 44 |
| 3" | 88.9 | 3.50 | 114 | 51 |
| 3-1/2" | 101.6 | 4.00 | 133 | 57 |
| 4" | 114.3 | 4.50 | 152 | 64 |
| 5" | 141.3 | 5.56 | 190 | 79 |
| 6" | 168.3 | 6.62 | 229 | 95 |
| 8" | 219.1 | 8.62 | 305 | 127 |
| 10" | 273.0 | 10.75 | 381 | 159 |
| 12" | 323.8 | 12.75 | 457 | 190 |
| 14" | 355.6 | 14.00 | 533 | 222 |
| 16" | 406.4 | 16.00 | 610 | 254 |
| 18" | 457.0 | 18.00 | 686 | 286 |
| 20" | 508.0 | 20.00 | 762 | 318 |
| 22" | 559.0 | 22.00 | 838 | 343 |
| 24" | 610.0 | 24.00 | 914 | 381 |
| NPS | Outside Diameter at Bevel (mm) | OD (inch) | Center-to-Center O (mm) | Center-to-Center O (inch) | Back-to-Face K (mm) | Back-to-Face K (inch) |
|---|---|---|---|---|---|---|
| 1/2" | 21.3 | 0.84 | 76 | 3.00 | 48 | 1.88 |
| 3/4" | 26.7 | 1.05 | 76 | 3.00 | 51 | 2.00 |
| 1" | 33.4 | 1.32 | 76 | 3.00 | 56 | 2.19 |
| 1-1/4" | 42.2 | 1.66 | 95 | 3.75 | 70 | 2.75 |
| 1-1/2" | 48.3 | 1.90 | 114 | 4.50 | 83 | 3.25 |
| 2" | 60.3 | 2.38 | 152 | 6.00 | 106 | 4.19 |
| 2-1/2" | 73.0 | 2.88 | 190 | 7.50 | 132 | 5.19 |
| 3" | 88.9 | 3.50 | 229 | 9.00 | 159 | 6.25 |
| 3-1/2" | 101.6 | 4.00 | 267 | 10.50 | 184 | 7.25 |
| 4" | 114.3 | 4.50 | 305 | 12.00 | 210 | 8.25 |
| 5" | 141.3 | 5.56 | 381 | 15.00 | 262 | 10.31 |
| 6" | 168.3 | 6.62 | 457 | 18.00 | 313 | 12.31 |
| 8" | 219.1 | 8.62 | 610 | 24.00 | 414 | 16.31 |
| 10" | 273.0 | 10.75 | 762 | 30.00 | 518 | 20.38 |
| 12" | 323.8 | 12.75 | 914 | 36.00 | 619 | 24.38 |
| 14" | 355.6 | 14.00 | 1067 | 42.00 | 711 | 28.00 |
| 16" | 406.4 | 16.00 | 1219 | 48.00 | 813 | 32.00 |
| 18" | 457.0 | 18.00 | 1372 | 54.00 | 914 | 36.00 |
| 20" | 508.0 | 20.00 | 1524 | 60.00 | 1016 | 40.00 |
| 22" | 559.0 | 22.00 | 1676 | 66.00 | 1118 | 44.00 |
| 24" | 610.0 | 24.00 | 1829 | 72.00 | 1219 | 48.00 |
| Dimension | Description | Unit |
|---|---|---|
| D | Outside Diameter at Bevel | mm / inch |
| O | Center-to-Center Dimension | mm / inch |
| K | Back-to-Face Dimension | mm / inch |
| A | One-Half of Center-to-Center Dimension O | mm / inch |
| 180° | Return / U Bend Angle | Degrees |
| LR | Long Radius Configuration | 1.5D Nominal Radius |
| Feature | LR 45° Elbow | LR 90° Elbow | LR 180° Return / U Bend |
|---|---|---|---|
| Angle | 45° | 90° | 180° |
| Radius | Long Radius | Long Radius | Long Radius |
| Typical Radius | 1.5D | 1.5D | 1.5D |
| Flow Direction | 45° Change | 90° Change | 180° Reversal |
| Dimension Reference | Center-to-End B | Center-to-End A | Center-to-Center O / Back-to-Face K |
| Connection | Butt Weld | Butt Weld | Butt Weld |
| Common Description | 45° LR Elbow | 90° LR Elbow | LR Return / U Bend |
| Schedule | Wall Classification | Typical Application |
|---|---|---|
| 5S | Light Wall | Low Pressure / Corrosive Service |
| 10S | Light Wall | General Process Piping |
| 20S | Medium Wall | Industrial Piping |
| STD | Standard Wall | General Industrial Service |
| 40S | Standard Wall | Process Piping |
| XS | Extra Strong | Higher Pressure Service |
| 80S | Heavy Wall | High Pressure Service |
| 160 | Extra Heavy Wall | High Pressure / High Temperature |
| XXS | Double Extra Strong | Heavy Duty Piping |
| Product | Angle | Radius | Weight Basis | Actual Weight |
|---|---|---|---|---|
| LR Elbow | 45° | Long Radius | NPS + Schedule + Material | Depends on actual configuration |
| LR Elbow | 90° | Long Radius | NPS + Schedule + Material | Depends on actual configuration |
| LR Return | 180° | Long Radius | NPS + Schedule + Material | Depends on actual configuration |
| U Bend | 180° | Long Radius | Tube/Pipe OD + Wall + Radius | Calculated from final dimensions |
| Custom LR Return | 180° | Custom | Approved Drawing | Calculated from drawing |
Actual weight varies according to NPS, outside diameter, wall thickness, schedule, material density, radius, manufacturing method and end preparation.
| Industry | Application |
|---|---|
| Oil & Gas | Pipeline and Process Piping |
| Petrochemical | Process Lines and Flow Direction Changes |
| Refinery | Process and Utility Piping |
| Power Generation | Steam, Boiler and High Temperature Piping |
| Chemical Processing | Corrosive Fluid Handling |
| Pharmaceutical | Stainless Steel Process Piping |
| Food Processing | Hygienic Piping Systems |
| Heat Exchanger Systems | Return and Circulation Lines |
| Boiler Systems | Tube Coil and Return Connections |
Each flange follows a rigorous 8-step forging and quality-control process to ensure conformance with ASTM A182 and ASME standards.
Prime 304 stainless steel billet sourced and certified.
Heat to 1100°C – 1250°C for optimal forgeability.
Shape billet into flange geometry under controlled pressure.
Solution anneal at 1040°C – 1120°C, then quench.
CNC machining, drilling, and surface finishing.
Tensile, hardness, PMI, visual and impact tests performed.