American Threaded 90° Elbow
- NPS :1/8“ to 2” (DN 6-50mm)
- Radius of curvature: 1.5D for long radius (LR) and 1D for short radius (SR).
- Pressure Rating: Radius of Curvature
- Maximum bearing pressure 1.6MPa
- Wall thickness: SCH80/XXS grade wall thickness 3.73-8.74mm
- Material: carbon steel, alloy, stainless steel
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American threaded 90° elbows are pipe steering fittings threaded through the ASME B1.20.1 standard tapered pipe, manufactured using a forging process, and are suitable for use in low-pressure systems such as fire protection and cooling water. Its sealing relies on mechanical fastening of the threads to the raw material tape, making it easier to install than butt-weld elbows but with lower pressure capacity. The standard radius of curvature reduces fluid resistance, and special material versions can cope with corrosive media.
American Threaded 90° Elbow
Comparison of long radius and short radius elbows
- Long Radius Elbow (1.5D) Short Radius Elbow (1.0D).
- Radius of curvature: 1.5 times the nominal diameter is equal to the nominal diameter of the pressure loss is reduced by 30% -50% of the fluid resistance is easy to produce turbulence and scouring.
- Space requirements: 57% increase in installation length for compact spaces.
- Applicable standards: GB/T12459-2017 preferred SH/T3059 limited to the maximum pressure degradation of 20%.
- Typical applications: slurry transportation, high-pressure steam boiler flue, jacketed pipe.
American Threaded 90° Elbow Dimensional Tolerance
Outside diameter deviation: ±0.8mm for ≤NPS 2, ±1%OD for >NPS2
Angle tolerance: 45 ° / 90 ° elbow allows ± 0.5 ° deviation
Carbon steel to meet ASTM A105, stainless steel to meet ASTM A182 F304/316
Wall Thickness-Pressure Comparison Table
| NPS (in) | DN (mm) | SCH40 (mm) | SCH80(mm) | 150LB Pressure(MPa) | 300LB Pressure (MPa) | 600LB Pressure (MPa) |
| 1/2 | 15 | 2.77 | 3.73 | 1.6 | 5 | 10 |
| 2 | 50 | 3.91 | 5.54 | 1.6 | 5 | 10 |
| 6 | 150 | 7.11 | 10.97 | 1.6 | 5 | 10 |
| 12 | 300 | 9.53 | 12.7 | 1.6 | 5 | 10 |
| 24 | 600 | 12.7 | 17.48 | 1.6 | 5 | 10 |