| NPS | Outside Diameter at Bevel (mm) | Outside Diameter (inch) | Center-to-Center O (mm) | Back-to-Face K (mm) |
|---|---|---|---|---|
| 1/2" | 21.3 | 0.84 | 76 | 48 |
| 3/4" | 26.7 | 1.05 | 76 | 51 |
| 1" | 33.4 | 1.32 | 76 | 56 |
| 1-1/4" | 42.2 | 1.66 | 95 | 70 |
| 1-1/2" | 48.3 | 1.90 | 114 | 83 |
| 2" | 60.3 | 2.38 | 152 | 106 |
| 2-1/2" | 73.0 | 2.88 | 190 | 132 |
| 3" | 88.9 | 3.50 | 229 | 159 |
| 3-1/2" | 101.6 | 4.00 | 267 | 184 |
| 4" | 114.3 | 4.50 | 305 | 210 |
| 5" | 141.3 | 5.56 | 381 | 262 |
| 6" | 168.3 | 6.62 | 457 | 313 |
| 8" | 219.1 | 8.62 | 610 | 414 |
| 10" | 273.0 | 10.75 | 762 | 518 |
| 12" | 323.8 | 12.75 | 914 | 619 |
| 14" | 355.6 | 14.00 | 1067 | 711 |
| 16" | 406.4 | 16.00 | 1219 | 813 |
| 18" | 457.0 | 18.00 | 1372 | 914 |
| 20" | 508.0 | 20.00 | 1524 | 1016 |
| 22" | 559.0 | 22.00 | 1676 | 1118 |
| 24" | 610.0 | 24.00 | 1829 | 1219 |
| NPS | Outside Diameter at Bevel (mm) | Outside Diameter (inch) | Center-to-Center O (mm) | Back-to-Face K (mm) |
|---|---|---|---|---|
| 1" | 33.4 | 1.32 | 51 | 41 |
| 1-1/4" | 42.2 | 1.66 | 64 | 52 |
| 1-1/2" | 48.3 | 1.90 | 76 | 62 |
| 2" | 60.3 | 2.38 | 102 | 81 |
| 2-1/2" | 73.0 | 2.88 | 127 | 100 |
| 3" | 88.9 | 3.50 | 152 | 121 |
| 3-1/2" | 101.6 | 4.00 | 178 | 140 |
| 4" | 114.3 | 4.50 | 203 | 159 |
| 5" | 141.3 | 5.56 | 254 | 197 |
| 6" | 168.3 | 6.62 | 305 | 237 |
| 8" | 219.1 | 8.62 | 406 | 313 |
| 10" | 273.0 | 10.75 | 508 | 391 |
| 12" | 323.8 | 12.75 | 610 | 467 |
| 14" | 355.6 | 14.00 | 711 | 533 |
| 16" | 406.4 | 16.00 | 813 | 610 |
| 18" | 457.0 | 18.00 | 914 | 686 |
| 20" | 508.0 | 20.00 | 1016 | 762 |
| 22" | 559.0 | 22.00 | 1118 | 838 |
| 24" | 610.0 | 24.00 | 1219 | 914 |
| 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 | Half of Center-to-Center Dimension | mm / inch |
| 180° | Return Bend Angle | Degrees |
| LR | Long Radius Return | Configuration |
| SR | Short Radius Return | Configuration |
| 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 |
| Return Type | Radius | Angle | Weight Determination |
|---|---|---|---|
| Seamless Return | Long Radius | 180° | Based on NPS, OD, wall thickness and material |
| Seamless Return | Short Radius | 180° | Based on NPS, OD, wall thickness and material |
| Buttwelding Return | Long Radius | 180° | Based on actual manufactured dimensions |
| Buttwelding Return | Short Radius | 180° | Based on actual manufactured dimensions |
| Custom Return | Custom | 180° | Calculated according to approved drawing |
Actual weight varies according to nominal pipe size, outside diameter, wall thickness, schedule, radius, material density, forming method and end preparation. Weight should therefore be confirmed against the final manufactured configuration.
| Industry | Typical Service |
|---|---|
| Petrochemical | Process Piping and Return Lines |
| Oil & Gas | Pipeline and Process Systems |
| Power Generation | Steam and High Temperature Piping |
| Chemical Processing | Corrosive Fluid Handling |
| Pharmaceutical | Stainless Steel Process Piping |
| Food Processing | Hygienic Piping Systems |
| Water Treatment | Process and Utility Piping |
| Refineries | Process and Utility Lines |
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.