Reducing Elbow
Reducing Elbow : Specifications | Materials | Types | Dimensions | Weight Chart | Tolerances | FAQ
Renowned ASME B16.9 Buttweld Reducing Elbow Manufacturer & Global Supplier – Offering top-grade Stainless Steel, Carbon Steel, Alloy Steel, and High Nickel Alloy Reducing Elbows (Seamless & Welded, SCH 40 / SCH 80) to France, Saudi Arabia, Malaysia, Chile, and New Zealand.
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. is a leading manufacturer and exporter of precision-engineered ASME B16.9 Reducing Elbows, designed to connect pipes of different diameters while ensuring a smooth change in flow direction. We combine engineering excellence with timely delivery and competitive pricing, making us a trusted partner for clients across the globe.
A Reducing Elbow is a specialized pipe fitting designed to connect two pipes of different diameters while simultaneously changing the direction of flow, typically at a 45° or 90° angle. Unlike standard elbows, a reducing elbow eliminates the need for a separate reducer and elbow, providing a more compact and streamlined solution. This integrated design reduces turbulence, minimizes pressure loss, and saves installation space.
Quality assurance for reducing elbows involves rigorous testing, including hydrostatic tests, ultrasonic inspections, radiography, and PMI (Positive Material Identification), to ensure compliance with international standards. With their efficiency, durability, and adaptability, ASME B16.9 Buttweld Reducing Elbows remain a key component in modern piping systems, delivering reliable performance under demanding conditions.
Reducing Elbow Specifications, Sizes & Standards
Buttweld Reducing Elbow – Materials, Grades & Standards
| Material Category | Grade | Standards (ASTM / ASME) | Typical Use/Application |
|---|---|---|---|
| Stainless Steel | 304 / 304L / 304H | ASTM A403 WP304/304L/304H | General purpose, corrosion resistance |
| 316 / 316L / 316H | ASTM A403 WP316/316L/316H | Marine & chemical applications | |
| 317 / 317L | ASTM A403 WP317/317L | High corrosion resistance | |
| 321 / 321H | ASTM A403 WP321/321H | High temperature, stabilized | |
| 347 / 347H | ASTM A403 WP347/347H | High-temp pressure systems | |
| 904L | ASTM A403 WP904L / B625 | Acid handling, sulfuric environments | |
| 254 SMO | ASTM A403 / B366 | High chloride environments | |
| Carbon Steel | A234 WPB / WPC | ASTM A234 | Pressure piping & general piping systems |
| A420 WPL6 | ASTM A420 | Low temperature services | |
| Alloy Steel | A234 WP1 / WP5 / WP9 | ASTM A234 | High-temp & pressure pipelines |
| A234 WP11 / WP22 | ASTM A234 | Steam lines & refineries | |
| A234 WP91 | ASTM A234 | Power generation, high performance | |
| Duplex Steel | UNS S31803 / S32205 | ASTM A815 / A790 | Corrosion & high strength use |
| Super Duplex Steel | UNS S32750 / S32760 | ASTM A815 / A790 | Offshore, seawater applications |
| Nickel Alloys | Nickel 200 / 201 | ASTM B366 / B162 | Alkali & chemical processing |
| Inconel 600 / 625 / 718 | ASTM B366 | Heat exchangers, aerospace | |
| Incoloy 800 / 825 | ASTM B366 | Petrochemical & chemical processing | |
| Hastelloy C22 / C276 | ASTM B366 | Severe corrosion resistance | |
| Monel 400 / K500 | ASTM B366 | Seawater, chemical industries | |
| Alloy 20 | ASTM B366 | Sulfuric acid services | |
| Nimonic 75 / 80A | ASTM B366 / B637 | High-temp applications | |
| Copper Nickel | Cu-Ni 90/10 / 70/30 | ASTM B466 / B467 | Marine systems, seawater service |
| Titanium | Grade 2 / Grade 5 | ASTM B363 | Lightweight, corrosion resistance |
| Aluminium | 6061 / 5083 | ASTM B361 | Low-pressure, non-corrosive piping |
Dimensions of Reducing Elbow
| Nominal Size (Main Pipe) | Nominal Size (Branch) | Center to End (A) | Outside Diameter (Main) (D) | Outside Diameter (Branch) (d) |
|---|---|---|---|---|
| 2″ | 1½″ | 76 | 60.3 | 48.3 |
| 3″ | 2″ | 114 | 88.9 | 60.3 |
| 4″ | 3″ | 152 | 114.3 | 88.9 |
| 6″ | 4″ | 229 | 168.3 | 114.3 |
| 8″ | 6″ | 305 | 219.1 | 168.3 |
| 10″ | 8″ | 381 | 273.0 | 219.1 |
| 12″ | 10″ | 457 | 323.9 | 273.0 |
| 14″ | 12″ | 533 | 355.6 | 323.9 |
| 16″ | 14″ | 610 | 406.4 | 355.6 |
| 18″ | 16″ | 686 | 457.0 | 406.4 |
| 20″ | 18″ | 762 | 508.0 | 457.0 |
| 24″ | 20″ | 914 | 610.0 | 508.0 |
Weight Chart: ASME B16.9 Reducing Elbow (SCH 40 / STD)
| Main Size (D) | Branch Size (d) | SCH 40 Weight (kg) | SCH 80 Weight (kg) |
|---|---|---|---|
| 2″ x 1½″ | 1.10 | 1.50 | 1.90 |
| 3″ x 2″ | 2.50 | 3.30 | 4.50 |
| 4″ x 3″ | 4.80 | 6.50 | 9.00 |
| 6″ x 4″ | 9.80 | 13.50 | 18.50 |
| 8″ x 6″ | 17.00 | 23.50 | 32.50 |
| 10″ x 8″ | 27.00 | 37.50 | 51.00 |
| 12″ x 10″ | 38.00 | 53.00 | 72.00 |
| 14″ x 12″ | 51.00 | 72.00 | 98.00 |
| 16″ x 14″ | 66.00 | 93.00 | 126.00 |
| 18″ x 16″ | 82.00 | 116.00 | 158.00 |
| 20″ x 18″ | 101.00 | 143.00 | 195.00 |
| 24″ x 20″ | 146.00 | 206.00 | 281.00 |
Buttweld Reducing Elbow Tolerances as per ASME B16.9
| Fitting Type | Parameter | Tolerance | |
|---|---|---|---|
| Up to 4” NPS | Above 4” NPS | ||
| Reducing Elbow | Outside Diameter at Bevel | ±1.6 mm (1/16″) | ±1.6 mm (1/16″) |
| Center-to-End (A, B) | ±1.6 mm (1/16″) | ±3.2 mm (1/8″) | |
| Wall Thickness | -12.5% (no positive tolerance) | ||
| Ovality | Shall not exceed 1% of specified OD | ||
What is the difference between a Reducing Elbow and a Reducer + Elbow combination?
Reducing Elbow (Single Fitting)
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Combines two functions: changes direction (45° or 90°) and reduces pipe size in one fitting.
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Saves space in the piping layout.
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Requires fewer joints/welds, reducing leakage risk.
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Faster installation with less labor cost.
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Ideal for compact systems and high-pressure applications.
Reducer + Elbow Combination (Two Separate Fittings)
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Uses a reducer to change pipe size and a separate elbow to change direction.
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Requires more installation space.
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Involves extra joints/welds, increasing leakage points.
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Takes more time and labor to install.
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Generally higher cost due to multiple fittings.
What are the advantages of using a Reducing Elbow?
The main advantages include:
Space saving: Eliminates the need for a separate reducer and elbow.
Reduced leakage points: Fewer joints mean less risk of leaks.
Smooth flow transition: Minimizes turbulence and pressure drop.
Cost-effective installation: Reduces the number of fittings needed.
How to select the right Reducing Elbow?
When selecting a reducing elbow, consider:
- Pipe size and reduction size
- Bend radius (Short Radius or Long Radius)
- Material compatibility with media
- Operating temperature and pressure
- Compliance with international standards like ASME B16.9, MSS-SP-43, and DIN specifications