Understanding the dimensions of 90-degree elbows is crucial for ensuring proper fit and function when designing or maintaining piping systems. This guide provides detailed charts of 90-degree elbow dimensions in inches, covering both long-radius (LR) and short-radius (SR) configurations.
Understanding 90-Degree Elbows
A 90-degree elbow is a pipe fitting that changes the direction of flow by 90 degrees. They are commonly used in various industries, including plumbing, HVAC, and industrial piping. The two primary types are:
- Long Radius (LR) Elbows: These have a center-to-end distance equal to 1.5 times the nominal pipe size (NPS). They are used when a smoother flow with less friction loss is required.
- Short Radius (SR) Elbows: These have a center-to-end distance equal to the NPS. They are used in tight spaces where a compact fitting is necessary.
90-degree radius Elbow Dimensions Chart (in inches)
Below is a chart detailing the dimensions of 90-degree long radius elbows:
| Nominal Pipe Size (NPS) | Outside Diameter (OD) | Center-to-End (A) | Approx. Weight (lbs) |
|---|---|---|---|
| 1/2 | 0.84 | 1.50 | 0.15 |
| 3/4 | 1.05 | 1.50 | 0.20 |
| 1 | 1.315 | 1.50 | 0.25 |
| 1 1/4 | 1.66 | 1.88 | 0.40 |
| 1 1/2 | 1.90 | 2.25 | 0.50 |
| 2 | 2.375 | 3.00 | 0.80 |
| 2 1/2 | 2.875 | 3.75 | 1.25 |
| 3 | 3.5 | 4.50 | 1.75 |
| 4 | 4.5 | 6.00 | 3.00 |
| 5 | 5.563 | 7.50 | 4.50 |
| 6 | 6.625 | 9.00 | 6.50 |
| 8 | 8.625 | 12.00 | 11.00 |
| 10 | 10.75 | 15.00 | 17.50 |
| 12 | 12.75 | 18.00 | 24.00 |
| 14 | 14.00 | 21.00 | 30.00 |
| 16 | 16.00 | 24.00 | 40.00 |
| 18 | 18.00 | 27.00 | 50.00 |
| 20 | 20.00 | 30.00 | 65.00 |
| 24 | 24.00 | 36.00 | 95.00 |
Note: Dimensions conform to ASME B16.9 standards.
90-degree Short Radius Elbow Dimensions Chart (in inches)
Below is a chart detailing the dimensions of 90-degree short-radius elbows:
| Nominal Pipe Size (NPS) | Outside Diameter (OD) | Center-to-End (A) | Approx. Weight (lbs) |
|---|---|---|---|
| 1/2 | 0.84 | 0.84 | 0.10 |
| 3/4 | 1.05 | 1.05 | 0.15 |
| 1 | 1.315 | 1.315 | 0.20 |
| 1 1/4 | 1.66 | 1.66 | 0.30 |
| 1 1/2 | 1.90 | 1.90 | 0.40 |
| 2 | 2.375 | 2.375 | 0.60 |
| 2 1/2 | 2.875 | 2.875 | 1.00 |
| 3 | 3.5 | 3.5 | 1.50 |
| 4 | 4.5 | 4.5 | 2.50 |
| 5 | 5.563 | 5.563 | 3.75 |
| 6 | 6.625 | 6.625 | 5.50 |
| 8 | 8.625 | 8.625 | 9.50 |
| 10 | 10.75 | 10.75 | 15.00 |
| 12 | 12.75 | 12.75 | 21.00 |
| 14 | 14.00 | 14.00 | 28.00 |
| 16 | 16.00 | 16.00 | 36.00 |
| 18 | 18.00 | 18.00 | 45.00 |
| 20 | 20.00 | 20.00 | 55.00 |
| 24 | 24.00 | 24.00 | 80.00 |
Note: Dimensions conform to ASME B16.9 standards.
Key Considerations
- Material Selection: Ensure the elbow material matches the piping material to prevent corrosion and ensure compatibility.
- Pressure Rating: Verify that the elbow’s pressure rating aligns with the system’s operating pressure.
- Application Requirements: Choose between long-radius and short-radius elbows based on space constraints and flow requirements.
FAQ
- What is the difference between long-radius and short-radius 90-degree elbows?
Long radius (LR) elbows have a center-to-end dimension equal to 1.5 times the nominal pipe size (NPS), offering smoother flow with reduced friction. Short radius (SR) elbows, on the other hand, have a center-to-end dimension equal to the NPS, making them suitable for tight spaces but with higher friction loss. - What standards are 90-degree elbow dimensions based on?
Most 90-degree elbow dimensions follow the ASME B16.9 standard, ensuring manufacturing uniformity and compatibility with various piping systems. - How do I choose the correct material for a 90-degree elbow?
Select a material that matches your piping system, considering pressure, temperature, and fluid type. Common materials include carbon steel, stainless steel, and various alloys. - What are the common applications of 90-degree elbows?
These fittings redirect flow, adjust piping layouts, or connect pipes at right angles in plumbing, HVAC systems, industrial piping, and chemical processing plants. - Where can I find a 90-degree elbow dimensions chart in PDF format?
You can download detailed charts from reputable industry resources or manufacturers’ websites, often in PDF format for easy reference. These charts typically include dimensions in inches for both long and short-radius elbows.
