ASME B16.9 ELBOW Dimension
Table Standard Specifications: ASME B16.9 / ANSI B16.28 / MSS-SP-43 | Product Type: Short Radius & Long Radius Elbows
2. Short Radius Elbow Size Chart (R = 1.0D)
Table Explanation
The center radius R of the short radius elbow is 1.0 × outer diameter (OD), suitable for installations with limited space. All dimensions conform to ASME B16.9 , in millimeters (mm) and kilograms (kg).
Short radius elbow size specification table (Schedule 40 standard wall thickness)
| Nominal size | NPS | outer diameter | OD (mm) | center radius | R (mm) | Wall thickness | t (mm) | weight | Weight (kg) | End type |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 0.5 | 21.3 | 21.3 | 21.3 | 21.3 | 2.77 | 2.77 | 0.25 | 0.25 | standard |
| 3/4 | 0.75 | 26.7 | 26.7 | 26.7 | 26.7 | 2.87 | 2.87 | 0.38 | 0.38 | standard |
| 1 | 1.0 | 33.4 | 33.4 | 33.4 | 33.4 | 3.38 | 3.38 | 0.58 | 0.58 | standard |
| 1-1/4 | 1.25 | 42.2 | 42.2 | 42.2 | 42.2 | 3.56 | 3.56 | 0.92 | 0.92 | standard |
| 1-1/2 | 1.5 | 48.3 | 48.3 | 48.3 | 48.3 | 3.68 | 3.68 | 1.15 | 1.15 | standard |
| 2 | 2.0 | 60.3 | 60.3 | 60.3 | 60.3 | 3.91 | 3.91 | 1.80 | 1.80 | standard |
| 2-1/2 | 2.5 | 73.0 | 73.0 | 73.0 | 73.0 | 4.19 | 4.19 | 2.65 | 2.65 | standard |
| 3 | 3.0 | 88.9 | 88.9 | 88.9 | 88.9 | 4.55 | 4.55 | 4.00 | 4.00 | standard |
| 4 | 4.0 | 114.3 | 114.3 | 114.3 | 114.3 | 5.16 | 5.16 | 6.80 | 6.80 | standard |
| 5 | 5.0 | 141.3 | 141.3 | 141.3 | 141.3 | 5.74 | 5.74 | 10.50 | 10.50 | standard |
| 6 | 6.0 | 168.3 | 168.3 | 168.3 | 168.3 | 6.35 | 6.35 | 15.20 | 15.20 | standard |
| 8 | 8.0 | 219.1 | 219.1 | 219.1 | 219.1 | 7.11 | 7.11 | 26.80 | 26.80 | standard |
| 10 | 10.0 | 273.0 | 273.0 | 273.0 | 273.0 | 8.18 | 8.18 | 44.50 | 44.50 | standard |
| 12 | 12.0 | 323.9 | 323.9 | 323.9 | 323.9 | 9.53 | 9.53 | 68.20 | 68.20 | standard |
3. Long Radius Elbow Dimensions Table (R = 1.5D)
Table Explanation
The center radius of the long radius elbow is R = 1.5 × outer diameter (OD), resulting in low fluid resistance and suitability for most industrial piping systems. All dimensions conform to ASME B16.9 .
Long radius elbow size specification table (Schedule 40 standard wall thickness)
| Nominal size | NPS | outer diameter | OD (mm) | center radius | R (mm) | Wall thickness | t (mm) | weight | Weight (kg) | End type |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 0.5 | 21.3 | 21.3 | 32.0 | 32.0 | 2.77 | 2.77 | 0.42 | 0.42 | standard |
| 3/4 | 0.75 | 26.7 | 26.7 | 40.0 | 40.0 | 2.87 | 2.87 | 0.65 | 0.65 | standard |
| 1 | 1.0 | 33.4 | 33.4 | 50.0 | 50.0 | 3.38 | 3.38 | 1.05 | 1.05 | standard |
| 1-1/4 | 1.25 | 42.2 | 42.2 | 63.0 | 63.0 | 3.56 | 3.56 | 1.68 | 1.68 | standard |
| 1-1/2 | 1.5 | 48.3 | 48.3 | 73.0 | 73.0 | 3.68 | 3.68 | 2.15 | 2.15 | standard |
| 2 | 2.0 | 60.3 | 60.3 | 90.5 | 90.5 | 3.91 | 3.91 | 3.45 | 3.45 | standard |
| 2-1/2 | 2.5 | 73.0 | 73.0 | 110.0 | 110.0 | 4.19 | 4.19 | 5.15 | 5.15 | standard |
| 3 | 3.0 | 88.9 | 88.9 | 133.0 | 133.0 | 4.55 | 4.55 | 7.80 | 7.80 | standard |
| 4 | 4.0 | 114.3 | 114.3 | 171.5 | 171.5 | 5.16 | 5.16 | 13.20 | 13.20 | standard |
| 5 | 5.0 | 141.3 | 141.3 | 212.0 | 212.0 | 5.74 | 5.74 | 20.50 | 20.50 | standard |
| 6 | 6.0 | 168.3 | 168.3 | 252.5 | 252.5 | 6.35 | 6.35 | 29.80 | 29.80 | standard |
| 8 | 8.0 | 219.1 | 219.1 | 328.5 | 328.5 | 7.11 | 7.11 | 52.50 | 52.50 | standard |
| 10 | 10.0 | 273.0 | 273.0 | 409.5 | 409.5 | 8.18 | 8.18 | 87.80 | 87.80 | standard |
| 12 | 12.0 | 323.9 | 323.9 | 486.0 | 486.0 | 9.53 | 9.53 | 134.50 | 134.50 | standard |
4. Wall Thickness Rating Table (Schedule Ratings)
Wall thickness description
According to ASME B16.9 standard, the wall thickness grades of elbows are divided into STD (standard), XS (thick), XXS (extra thick), etc., which are suitable for different pressure ratings.
ASME B16.9 Elbow Wall Thickness Grade Comparison Table
| Wall thickness grade | Schedule | Nominal size range | NPS Range | Applicable Standards | Application | Minimum wall thickness | Min. Thickness (mm) |
|---|---|---|---|---|---|---|---|
| standard | STD | 1/2 – 24 | 0.5 – 24 | ASME B16.9 | General Purpose | 2.77 – 12.70 | |
| Thickened | XS | 1/2 – 24 | 0.5 – 24 | ASME B16.9 | High voltage applications | 3.73 – 19.05 | |
| Extra Thick | XXS | 1/2 – 20 | 0.5 – 20 | ASME B16.9 | Extremely high pressure | 5.56 – 31.75 | |
| 40 | 40 | 1/2 – 24 | 0.5 – 24 | ASME B16.9 | Standard pressure | 2.77 – 12.70 | |
| 80 | 80 | 1/2 – 24 | 0.5 – 24 | ASME B16.9 | Medium and high voltage | 3.73 – 19.05 | |
| 160 | 160 | 1 – 24 | 1.0 – 24 | ASME B16.9 | high pressure | 5.56 – 31.75 | |
| XXS | XXS | 1/2 – 20 | 0.5 – 20 | ASME B16.9 | Ultra-high pressure | 5.56 – 31.75 |
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