Buttweld 90° Elbow
BW 90 Degree Elbow: Specifications | Materials | Types | Dimensions | Weight Chart | Tolerances | FAQ
ASME B16.9 Buttweld 90 Degree Elbow Manufacturers, Suppliers and Exporters of Seamless & Welded Sch 40 / Sch 80 90° Elbow in Stainless, Alloy, Carbon Steel, and other High Nickel Grades to USA, UK, Middle East Countries
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. is a trusted name in the field of industrial pipe fittings, manufacturing and supplying high‑quality 90 degree elbows for a wide range of applications. These elbows are designed to smoothly change the direction of flow in pipelines while ensuring strength and durability. Using quality materials such as stainless steel, carbon steel, and alloy steel, our elbows are made to resist corrosion and provide long service life.
We offer seamless and welded 90° Elbow options in different sizes, pressure classes, and specifications that comply with ASME, ANSI, DIN, and other recognized standards. Commonly used in sectors like oil & gas, petrochemical, power generation, water treatment, and chemical processing, our 90 Deg elbows are built for reliable performance even in challenging conditions.
A Buttweld 90 Degree Elbow is a key pipe fitting used to change the direction of flow in a piping system by 90 degrees. It connects two pipes of the same or different diameters through welding, ensuring a strong, leak‑proof joint. This fitting is widely preferred in industries where durability, high pressure handling, and smooth fluid flow are essential.
Our 90 Degree Elbows ensure smooth flow change without turbulence and provide a strong, leak‑proof joint through full penetration welding. Available in seamless and welded types, these elbows come in short radius (SR) and long radius (LR) designs to suit different piping needs. Manufactured to ASME B16.9, MSS‑SP‑75, and DIN standards, they deliver precision, durability, and reliable performance in industrial applications.
We offer high‑precision Buttweld 90° elbows manufactured using advanced technology and strict quality control. Each fitting meets international standards to ensure excellent performance, corrosion resistance, and long service life. Whether you need seamless or welded elbows in standard or custom sizes, we can supply at competitive prices.
90 Degree Elbow Specifications, Sizes & Standards
BW 90° 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 |
Types of ASME B16.9 Buttweld 90° Elbow
Dimensions of 90 Degree Elbow
| NPS (Nominal Pipe Size) | Outside Diameter (OD) mm | Center-to-End (A) – LR mm | Center-to-End (A) – SR mm |
|---|---|---|---|
| 1/2″ | 21.3 | 38 | 25 |
| 3/4″ | 26.7 | 38 | 25 |
| 1″ | 33.4 | 38 | 25 |
| 1 1/4″ | 42.2 | 48 | 32 |
| 1 1/2″ | 48.3 | 57 | 38 |
| 2″ | 60.3 | 76 | 51 |
| 2 1/2″ | 73.0 | 95 | 64 |
| 3″ | 88.9 | 114 | 76 |
| 3 1/2″ | 101.6 | 133 | 89 |
| 4″ | 114.3 | 152 | 102 |
| 5″ | 141.3 | 190 | 127 |
| 6″ | 168.3 | 229 | 152 |
| 8″ | 219.1 | 305 | 203 |
| 10″ | 273.0 | 381 | 254 |
| 12″ | 323.8 | 457 | 305 |
Weight Chart: ASME B16.9 Buttweld 90 deg Elbow(Carbon Steel, SCH 40 / STD)
| Size (Inches) | 90° Elbow (kg) |
|---|---|
| ½” | 0.15 |
| ¾” | 0.25 |
| 1″ | 0.40 |
| 1½” | 0.90 |
| 2″ | 1.40 |
| 3″ | 3.40 |
| 4″ | 6.00 |
| 6″ | 12.00 |
| 8″ | 20.00 |
| 10″ | 31.00 |
| 12″ | 45.00 |
| 14″ | 60.00 |
| 16″ | 78.00 |
| 18″ | 100.00 |
| 20″ | 125.00 |
| 24″ | 180.00 |
| 26″ | 210.00 |
| 28″ | 240.00 |
| 30″ | 275.00 |
| 32″ | 310.00 |
| 36″ | 380.00 |
| 40″ | 460.00 |
| 42″ | 500.00 |
| 44″ | 540.00 |
| 48″ | 620.00 |
90° Elbow Fitting Tolerances as per ASME B16.9
| Fitting Type | Parameter | Tolerance | |
|---|---|---|---|
| Up to 4” NPS | Above 4” NPS | ||
| 90° Elbows | 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 | ||
How to choose the right 90 Degree Elbow?
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Determine Pipe Size – Match the elbow to the exact nominal pipe size (NPS) of your piping system to ensure a perfect fit and maintain consistent flow capacity.
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Check Wall Thickness (Schedule) – Verify that the elbow’s wall thickness corresponds with the pipe schedule (e.g., Sch 40, Sch 80, Sch 160) to handle the system’s pressure requirements safely.
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Select Material Type – Choose materials based on operating environment and media type. Common options include stainless steel for corrosion resistance, carbon steel for cost efficiency, and alloy steel or special alloys for high-temperature or high-pressure conditions.
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Choose Radius Type –
Long Radius (LR) – Ideal for smoother flow, reduced turbulence, and lower pressure drop; preferred in most industrial applications.
Short Radius (SR) – Suitable for installations with tight spaces where compact piping is essential, though it may cause higher flow resistance.
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Confirm Standards Compliance – Ensure the elbow meets relevant standards such as ASME B16.9, EN, DIN, or JIS to guarantee dimensional accuracy, material quality, and global compatibility.
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Consider Operating Conditions – Factor in system temperature, operating pressure, and the nature of the conveyed fluid (abrasive, corrosive, viscous) to select an elbow that ensures safety, durability, and optimal performance.
What does a 90 Degree Elbow do in a piping system?
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Direction Change: Redirects the flow by exactly 90 degrees.
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Space Management: Helps pipelines navigate around obstacles or fit in tight spaces.
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Design Flexibility: Enables compact and efficient piping layouts.
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Flow Continuity: Maintains fluid flow with minimal disruption when properly designed.
Which standards define the dimensions and quality of 90 Degree Elbows?
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ASME B16.9: Specifies factory-made wrought buttweld fittings, including dimensional tolerances and wall thickness.
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MSS-SP-75: Covers high-strength butt-welding fittings for pipeline systems.
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DIN Standards: Provide German specifications for dimensions, materials, and tolerances.
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ANSI Standards: Define measurement units, pressure ratings, and manufacturing quality.
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ISO Standards: Offer globally harmonized specifications for interchangeability and quality assurance.