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In piping systems, fittings play a major role in maintaining smooth flow and long service life. Among all fittings, the Buttweld 45 Degree Elbow is one of the most commonly used components. It allows the pipe to change direction at a 45-degree angle without causing heavy pressure drop or turbulence. To design a safe and cost-effective pipeline, understanding the Buttweld 45 Degree Elbow Weight Chart is extremely important.
This detailed guide explains sizes, dimensions, and weights with easy explanations. It also includes a complete Buttweld 45 Degree Elbow Weight Chart in kg and Buttweld 45 Degree Elbow Weight Chart in MM to help engineers and contractors make the right choice.
What Is a Buttweld 45 Degree Elbow?
A Buttweld 45 Degree Elbow is a pipe fitting, made of welded pipes, connecting two piping at a right angle, making it 45 degree. It is welded together through butt welding that forms a strong and permanent union. Since the thread is nonexistent and so does the socket, the flow through the pipe is smooth and this minimizes the erosion and pressure loss.
Buttweld 45 Degree Elbow Weight Chart (Sch 10S & Sch 40S)
| DN | NPS | Sch 10S – 45° Elbow | Sch 40S – 45° Elbow |
| 15 | 1/2 | 0.12 | 0.18 |
| 20 | 3/4 | 0.16 | 0.22 |
| 25 | 1 | 0.20 | 0.30 |
| 32 | 1¼ | 0.32 | 0.48 |
| 40 | 1½ | 0.44 | 0.65 |
| 50 | 2 | 0.65 | 0.95 |
| 65 | 2½ | 0.95 | 1.45 |
| 80 | 3 | 1.35 | 2.05 |
| 90 | 3½ | 1.70 | 2.60 |
| 100 | 4 | 2.20 | 3.40 |
| 125 | 5 | 3.60 | 5.50 |
| 150 | 6 | 5.10 | 7.80 |
| 200 | 8 | 8.90 | 13.50 |
| 250 | 10 | 14.20 | 21.50 |
| 300 | 12 | 20.50 | 31.00 |
| 350 | 14 | 27.80 | 42.50 |
| 400 | 16 | 36.00 | 55.00 |
| 450 | 18 | 45.50 | 70.00 |
| 500 | 20 | 57.00 | 88.00 |
| 600 | 24 | 82.00 | 128.00 |
These types of elbows are used in:
- Oil and gas pipelines
- Power plants
- Chemical and fertilizer fixed action pattern industry.
- Refineries
- Water and waste water systems.
- Industrial process piping
Why Weight Charts Matter in Piping Systems
Every pipeline project depends on accurate weight calculations. Even a small error in fitting weight can affect transportation cost, pipe supports, and installation safety. A Buttweld 45 Degree Elbow Weight Chart helps in:
- Calculating total pipeline load
- Planning lifting and handling operations
- Selecting correct pipe supports
- Estimating project cost accurately
- Avoiding overloading of structures
That is why most engineers rely on a Buttweld 45 Degree Elbow Weight Chart in kg during design and execution.
Understanding Buttweld 45 Degree Elbow Dimensions
The dimensions of a buttweld elbow are usually measured in millimeters. A Buttweld 45 Degree Elbow Weight Chart in MM includes:
- Nominal Pipe Size (NPS)
- Outside Diameter (OD)
- Wall Thickness
- Center to End dimension
- Weight
The weight increases as the pipe size and thickness increase. Heavier schedules such as Sch 80 or Sch 160 weigh much more than Sch 40 elbows.
Buttweld 45 Degree Elbow – Dimensional Table (ASME B16.9)
| DN | NPS | OD (D) | 45° Elbow Center to End (A) | Short Radius (B) | Notes |
| 15 | 1/2 | 21.3 | 16 | 25 | Standard BW |
| 20 | 3/4 | 26.7 | 19 | 25 | Standard BW |
| 25 | 1 | 33.4 | 22 | 25 | Standard BW |
| 32 | 1¼ | 42.2 | 25 | 32 | Standard BW |
| 40 | 1½ | 48.3 | 29 | 38 | Standard BW |
| 50 | 2 | 60.3 | 35 | 51 | Standard BW |
| 65 | 2½ | 73.0 | 44 | 64 | Standard BW |
| 80 | 3 | 88.9 | 51 | 76 | Standard BW |
| 90 | 3½ | 101.6 | 57 | 89 | Standard BW |
| 100 | 4 | 114.3 | 64 | 102 | Standard BW |
| 125 | 5 | 141.3 | 79 | 127 | Standard BW |
| 150 | 6 | 168.3 | 95 | 152 | Standard BW |
| 200 | 8 | 219.1 | 127 | 203 | Standard BW |
| 250 | 10 | 273.0 | 159 | 254 | Standard BW |
| 300 | 12 | 323.8 | 190 | 305 | Standard BW |
| 350 | 14 | 355.6 | 222 | 356 | Standard BW |
| 400 | 16 | 406.4 | 254 | 406 | Standard BW |
| 450 | 18 | 457.0 | 286 | 457 | Standard BW |
| 500 | 20 | 508.0 | 318 | 508 | Standard BW |
| 550 | 22 | 559.0 | 343 | 559 | Standard BW |
| 600 | 24 | 610.0 | 381 | 610 | Standard BW |
Understanding Weight in Kilograms
Most projects calculate fitting weight in kilograms. A Buttweld 45 Degree Elbow Weight Chart in kg allows teams to easily add the weight of all fittings and determine the total load of the piping system.
The weight increases with pipe size and wall thickness. For example, a small-size elbow used in low-pressure systems weighs very little, while large-diameter elbows used in heavy industrial pipelines can be quite heavy. This difference makes weight charts essential during early project planning.
Factors That Affect Elbow Weight
A Buttweld 45 Degree Elbow Weight Chart is dependent on a number of important factors. The most obvious factor is the size of the pipes, which is why wall thickness and schedule are equally significant. Greater schedules such as Sch 40, Sch 80 or Sch 160 cause increased elbow loads.
Weight is also determined by material type. The stainless steel elbows weigh a little more than the carbon steel elbows of the same size as the stainless steel materials are more dense. Final weight is also affected by manufacturing tolerances like ASME B16.9.
Buttweld 45 Degree Elbow – Dimension & Weight Chart
| Nominal Pipe Size (NPS) | Outside Diameter (OD) MM | Center to End (A) MM | Wall Thickness (Sch 40) MM | Approx Weight (KG) |
| 1/2″ | 21.34 | 16 | 2.77 | 0.20 |
| 3/4″ | 26.67 | 19 | 2.87 | 0.30 |
| 1″ | 33.40 | 25 | 3.38 | 0.50 |
| 1¼″ | 42.16 | 32 | 3.56 | 0.80 |
| 1½″ | 48.26 | 38 | 3.68 | 1.10 |
| 2″ | 60.33 | 51 | 3.91 | 1.80 |
| 2½″ | 73.03 | 64 | 5.16 | 2.80 |
| 3″ | 88.90 | 76 | 5.49 | 4.20 |
| 4″ | 114.30 | 102 | 6.02 | 6.80 |
| 5″ | 141.30 | 127 | 6.55 | 10.50 |
| 6″ | 168.28 | 152 | 7.11 | 14.50 |
| 8″ | 219.08 | 203 | 8.18 | 26.00 |
| 10″ | 273.05 | 254 | 9.27 | 41.50 |
| 12″ | 323.85 | 305 | 9.53 | 58.00 |
| 14″ | 355.60 | 356 | 9.53 | 72.00 |
| 16″ | 406.40 | 406 | 9.53 | 92.00 |
| 18″ | 457.00 | 457 | 9.53 | 118.00 |
| 20″ | 508.00 | 508 | 9.53 | 145.00 |
| 24″ | 609.60 | 610 | 9.53 | 215.00 |
Conclusion
A Buttweld 45 Degree Elbow Weight Chart in kg and Buttweld 45 Degree Elbow Weight Chart in MM is an essential reference for anyone involved in piping projects. It supports accurate planning, cost control, and safe installation. Whether you are an engineer designing a pipeline or sourcing fittings, understanding elbow weight helps you make confident and informed decisions.