Rajveer Stainless & Alloys is the prominent manufacturer, supplier, and exporter of pipe bends and elbows worldwide. The entire long radius elbow range is available at different dimensions, size, shape, length, surface finish, and wall thickness. We also offer this LR Bend as per our valuable clients and the industry demands at the best price. It is the part of pipe fittings used broadly as a form of connection between two lengths of pipes for the fluid’s flow direction into the pipe. These are used in the piping system for smooth working.
Long-radius (LR) elbows are pipe fittings specifically designed to change the direction of flow with a gentle turn. By definition, a long-radius elbow has a centerline curvature of 1.5× the nominal pipe diameter (1.5D). This larger radius produces a smoother, gradual change in direction, which reduces turbulence and pressure drop compared to sharper bends. Long-radius elbows are commonly available in standard angles (22.5°, 45°, 90°, 180°) and are identified by their large center-to-face dimensions (1.5×NPS for 90° bends). In contrast, a short-radius (SR) elbow has a radius equal to 1.0× the diameter (1D) and a more compact shape.
LR elbows provide gradual changes in flow direction, minimizing energy loss. They reduce pressure drop and erosion (especially important in high-velocity or abrasive flows). The larger bend radius means fluid “sees” a gentler turn, so velocity profile and pressure remain more uniform through the elbow. These come in various sizes from ½″ (DN15) up to very large diameters, with standard sizes covering NPS ½–48 (OD 21.3–1219 mm).
LR Elbow has excellent mechanical strength with perfect dimensional accuracy. It is available in various materials such as stainless steel, carbon steel, high nickel alloy such as nickel, monel, hastelloy, inconel, etc. It provides good corrosion resistance, pitting resistance, and oxidation resistance.
Return bend, also known as a 180° elbow, is a pipe fitting system that helps in moving liquids or other fluids safely and efficiently, and it allows for the whole reversal of the flow. This type of fitting creates a U-shaped path, completely changing the direction of flow back toward the origin point.
U bend, essentially another name for the return bend or 180° elbow, has an anti-corrosive body that shows excellent resistance to high heat and acidic media. We offer return elbow having many outstanding features such as high tensile strength, superior finish, higher durability, and excellent machinability.
Return bend also offers remarkable erosion resistance and longer functioning life. This U Bend also provides better resistance to crevice corrosion and stress corrosion cracking. Because of these attributes, Rajveer Stainless & Alloys manufactured LR Bend are highly valued by our clients. Our high-quality LR Elbow is mostly used by the ventilation facility pipeline, water supply system, dairy, food processing industrial pipeline, chemical industry, solar power application, fertilizer, sugar industry, petrochemical, and agriculture industry.
Rajveer Stainless & Alloys manufactures elbow bend pipe using premium quality raw materials selected and tested thoroughly by our expert team members. Our professionals precisely fabricate these products using the latest tools and techniques to fulfill the needs of industries. We always follow all the international and national quality standards to ensure perfect dimensional accuracy. We give the highest significance to the packaging of products and appropriately pack U Bend and offer damage-free delivery. We always use the fastest mode of transport and provide on-time delivery of products.
| Size | Seamless ( 1/2″～24″), Welded / Fabricated (1/2″～48″) |
|---|---|
| Dimensions | ASME/ANSI B16.9, ASME B16.28, BS4504, BS4504, BS1560, BS10 |
| Type | Buttweld |
| Form | Buttweld Long Radius Elbow, Returns & U Bends. |
Standards
Long-radius elbows are governed by pipe fitting standards. In the US/ANSI system, ASME B16.9 covers wrought butt-weld pipe fittings (including LR elbows) for NPS ½–48. (By contrast, ASME B16.28 covers short‐radius elbows).
Material standards include ASTM A234/A420 for carbon & alloy steel fittings and ASTM A403/A815 for austenitic and duplex stainless fittings.
Internationally, ISO 3419 (steel butt-weld fittings) specifies dimensions and steels for bends (type “2D” and “3D”) and ISO 5251 covers stainless butt-weld fittings (type 3D, 5D).
European standards (EN 10253-2/-4) and MSS SP-43 (stainless) likewise define LR elbow geometry.
In summary, LR elbows conform to the dimensional and material specs of these standards, ensuring interchangeability and code compliance.
Types and Sizes:
LR elbows come in various angles. The most common are 90° bends, followed by 45° and 180° (U-bend) elbows.
Some systems also use 22.5° or 60° elbows for finer directional control. Standard sizes cover from ½″ (DN15) up to very large diameters (ASME B16.9 covers NPS ½–48, i.e. OD 21.3–1219 mm.
In metric, ISO and EN standards cover butt-weld fittings in similar size ranges. Elbows are made to various wall thicknesses (schedules): for example, standard weight (SCH40), extra-strong (SCH80/XH), and double-extra strong (XXS) are common. The center-to-end dimensions scale with pipe size: for a 90° LR elbow the “center‐to‐face” distance = 1.5×NPS (in inches). (For example, a 6″ NPS LR elbow would have about a 9″ center‑to‑face.)
Materials Used
Long-radius elbows are made from many materials.
Stainless steel long radius elbows (ASTM A403 WP304/316L, A182 F304/316, etc.) are used for corrosive or hygienic services
Duplex stainless (ASTM A815 UNS S31803/32205) is common for oil/gas corrosive service,
Nickel alloys (ASTM B366, e.g. Inconel, Monel, Hastelloy,) for extreme conditions. PVC and CPVC elbows (e.g. ASTM D2466/D2467 fittings) are widely used in water and corrosive fluid plumbing (low pressure, non-metallic systems). Other specialty materials exist (e.g. brass/copper for small elbows, FRP composites, etc.), but carbon and stainless steel dominate high-pressure piping.
Carbon steel is most common (grades like ASTM A234 WPB, A106, ASME SA105), for moderate service (water, steam, oil).
Low-temperature carbon steels (ASTM A420 WPL3/WPL6) are specified for cryogenic services.
Alloy steels (ASTM A234 grades WP1, WP5, WP9, WP91, etc.) cover higher-temperature and higher-pressure oil/gas applications.
Carbon Steel long radius elbow |
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Stainless Steel long radius elbow |
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Alloy Steel long radius elbow |
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Inconel 90 Degree Long Radius Pipe Elbow |
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Copper Long Radius Elbow Materia | T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc |
Copper Nickel Long Radius 90 Degree Elbow | Copper Nickel 90/10 (C70600 ) Longs rad. Elbows, Cupro Nickel 70/30 (C71500) Long Radius Sanitary Elbows, UNS C71640 Long Radius Street Elbows |
Brass Long Radius 45 Degree Elbow | 3602 / 2604 / H59 / H62 / etc. |
Hastelloy Long Radius Reducing Elbow | Hastelloy C276 (UNS N10276) Longs Radius Bend Elbows, C22 (UNS N06022) Long rad. Elbow, C4 Long Radius 45 Degree Elbows, C2000 Long Radius Reducing Elbows, B2 Long Radius Pipe Elbows, B3 Long rad. Elbow, X Long rad. Elbow |
Monel Long Radius Pipe Elbow | Monel 400 (UNS No. N04400) Elbows 90 Degree Long Radius, Monel 500 (UNS No. N05500) Long Radius Sanitary Elbows |
Alloy 20 Lr Bw Elbow | Carpenter® 20 Alloy Longs Radius Street Elbows, Alloy 20Cb-3 Long Radius Steel Elbows |
Aluminium 5d Long Radius Elbow | 5052 /6061/ 6063 / 2017 / 7075 / etc. |
Nickel Lr Bw Elbow | Nickel 200 Sch 40 Long rad. Elbows, Nickel 201 Schedule 10 Long Radius Elbows |
Duplex 10 Inch Long Radius Elbows | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
Super Duplex 10 Inch Long Radius Elbows | S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
Incoloy 12 Inch Long Radius Elbows | Incoloy 800 Sch 160 Longs rad. Elbows, Incoloy 800H Sch 10 Longs rad. Elbows, Incoloy 800HT (UNS N08800) 90 Degree Lr Elbows, Incoloy 825 (UNS N08825) Sch 40 Lr Elbows |
254 Smo Long Radius Elbow Pipe Fittings | SMO 254/6Mo Elbows 45 Deg Lr, UNS S31254 LR Bw Elbows, DIN 1.4547 10 Inch Long Radius Elbows |
Nimonic 90 Degree Long Radius Pipe Elbow | Nimonic 75 12 Inch Long Radius Elbows, Nimonic 80A Long Radius Elbows Pipe Fittings, Nimonic 90 long radius elbow |
Other Long Radius Elbow Material | Tin bronze Long Radius Grooved Elbows, Alumunum bronze 90 Degree Long Radius Pipe Elbows, Lead bronze Long Radius Elbows Sch 40 |
Titanium Long Radius Bend Elbow |
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Long-radius elbows are governed by pipe fitting standards. In the US/ANSI system, ASME B16.9 covers wrought butt-weld pipe fittings (including LR elbows) for NPS ½–48. (By contrast, ASME B16.28 covers short‐radius elbows).
| Nominal Pipe Size (NPS) | Outside Diameter at Bevel (O/D) | Dimension A | Dimension B | Center to Center O | Back to Face K |
|---|---|---|---|---|---|
| 1/2″ | 21.3 | 38 | 16 | 76 | 48 |
| 3/4″ | 26.7 | 38 | 19 | 76 | 51 |
| 1″ | 33.4 | 38 | 22 | 76 | 56 |
| 1.1/4″ | 42.2 | 38 | 25 | 95 | 70 |
| 1.1/2″ | 48.3 | 57 | 29 | 95 | 83 |
| 2″ | 60.3 | 76 | 35 | 152 | 106 |
| 2.1/2″ | 73.0 | 95 | 44 | 190 | 132 |
| 3″ | 88.9 | 114 | 51 | 229 | 159 |
| 3.1/2″ | 101.6 | 133 | 57 | 267 | 184 |
| 4″ | 114.3 | 152 | 64 | 305 | 210 |
| 5″ | 141.3 | 190 | 79 | 381 | 262 |
| 6″ | 168.3 | 229 | 95 | 457 | 313 |
| 8″ | 219.1 | 305 | 127 | 610 | 414 |
| 10″ | 273.0 | 381 | 159 | 762 | 518 |
| 12″ | 323.8 | 457 | 190 | 914 | 619 |
| 14″ | 355.6 | 533 | 222 | 1067 | 711 |
| 16″ | 406.4 | 610 | 254 | 1219 | 813 |
| 18″ | 457.0 | 686 | 286 | 1372 | 914 |
| 20″ | 508.0 | 762 | 318 | 1524 | 1016 |
| 22″ | 559.0 | 838 | 343 | 1676 | 1118 |
| 24″ | 610.0 | 914 | 381 | 1829 | 1219 |
| 26″ | 660.0 | 991 | 406 | …… | …… |
| 28″ | 711.0 | 1067 | 438 | …… | …… |
| 30″ | 762.0 | 1143 | 470 | …… | …… |
| 32″ | 813.0 | 1219 | 502 | …… | …… |
| 34″ | 864.0 | 1295 | 533 | …… | …… |
| 36″ | 914.0 | 1372 | 565 | …… | …… |
| NPS | O.D. D | 90 degrees Long Radius Center-to-End A | 90 degrees 3D Center-to-End A |
| 1/2 | 21.3 | 38 | – |
| 3/4 | 26.7 | 38 | 57 |
| 1 | 33.4 | 38 | 76 |
| 1¼ | 42.2 | 48 | 95 |
| 1½ | 48.3 | 57 | 114 |
| 2 | 60.3 | 76 | 152 |
| 2½ | 73 | 95 | 190 |
| 3 | 88.9 | 114 | 229 |
| 3½ | 101.6 | 133 | 267 |
| 4 | 114.3 | 152 | 305 |
| 5 | 141.3 | 190 | 381 |
| 6 | 168.3 | 229 | 457 |
| 8 | 219.1 | 305 | 610 |
| 10 | 273 | 381 | 762 |
| 12 | 323.8 | 457 | 914 |
| 14 | 355.6 | 533 | 1067 |
| 16 | 406.4 | 610 | 1219 |
| 18 | 457 | 686 | 1372 |
| 20 | 508 | 762 | 1524 |
| 22 | 559 | 838 | 1676 |
| 24 | 610 | 914 | 1829 |
| 26 | 660 | 991 | 1981 |
| 28 | 711 | 1067 | 2134 |
| 30 | 762 | 1143 | 2286 |
| 32 | 813 | 1219 | 2438 |
| 34 | 864 | 1295 | 2591 |
| 36 | 914 | 1372 | 2743 |
| 38 | 965 | 1448 | 2896 |
| 40 | 1016 | 1524 | 3048 |
| 42 | 1067 | 1600 | 3200 |
| 44 | 1118 | 1676 | 3353 |
| 46 | 1168 | 1753 | 3505 |
| 48 | 1219 | 1829 | 3658 |
| NPS | O.D. D | 45 Degrees Long Radius Center-to-End A | 45 Degrees 3D Center-to-End A |
| 1/2 | 21.3 | 38 | – |
| 3/4 | 26.7 | 38 | 57 |
| 1 | 33.4 | 38 | 76 |
| 1¼ | 42.2 | 48 | 95 |
| 1½ | 48.3 | 57 | 114 |
| 2 | 60.3 | 76 | 152 |
| 2½ | 73 | 95 | 190 |
| 3 | 88.9 | 114 | 229 |
| 3½ | 101.6 | 133 | 267 |
| 4 | 114.3 | 152 | 305 |
| 5 | 141.3 | 190 | 381 |
| 6 | 168.3 | 229 | 457 |
| 8 | 219.1 | 305 | 610 |
| 10 | 273 | 381 | 762 |
| 12 | 323.8 | 457 | 914 |
| 14 | 355.6 | 533 | 1067 |
| 16 | 406.4 | 610 | 1219 |
| 18 | 457 | 686 | 1372 |
| 20 | 508 | 762 | 1524 |
| 22 | 559 | 838 | 1676 |
| 24 | 610 | 914 | 1829 |
| 26 | 660 | 991 | 1981 |
| 28 | 711 | 1067 | 2134 |
| 30 | 762 | 1143 | 2286 |
| 32 | 813 | 1219 | 2438 |
| 34 | 864 | 1295 | 2591 |
| 36 | 914 | 1372 | 2743 |
| 38 | 965 | 1448 | 2896 |
| 40 | 1016 | 1524 | 3048 |
| 42 | 1067 | 1600 | 3200 |
| 44 | 1118 | 1676 | 3353 |
| 46 | 1168 | 1753 | 3505 |
| 48 | 1219 | 1829 | 3658 |
| NPS | O.D. D | 180° Long Radius | |
Center to Center O | Back to Face K | ||
| 1/2 | 21.3 | 76 | 48 |
| 3/4 | 26.7 | 76 | 51 |
| 1 | 33.4 | 76 | 56 |
| 1¼ | 42.2 | 95 | 70 |
| 1½ | 48.3 | 114 | 83 |
| 2 | 60.3 | 152 | 106 |
| 2½ | 73 | 190 | 132 |
| 3 | 88.9 | 229 | 159 |
| 3½ | 101.6 | 267 | 184 |
| 4 | 114.3 | 305 | 210 |
| 5 | 141.3 | 381 | 262 |
| 6 | 168.3 | 457 | 313 |
| 8 | 219.1 | 610 | 414 |
| 10 | 273 | 762 | 518 |
| 12 | 323.8 | 914 | 619 |
| 14 | 355.6 | 1067 | 711 |
| 16 | 406.4 | 1219 | 813 |
| 18 | 457 | 1372 | 914 |
| 20 | 508 | 1524 | 1016 |
| 22 | 559 | 1676 | 1118 |
| 24 | 610 | 1829 | 1219 |
| Type of Seamless Long Radius Return | FOB Price: US $0.2-50 / Piece |
| Long Radius U Bends | FOB Price: US $0.2-500 / Piece |
| Nickel Alloy Seamless LR 45° Elbow | FOB Price: US $1.2-2500 / Piece |
| Long Radius Returns manufacturer | FOB Price: US $0.11-1 / Piece |
| High Quality Butt Weld LR 90 Deg Elbow | FOB Price: US $8-8000 / Piece |
| Stainless Steel Long Radius U Bends | FOB Price: US $0.5-6 / Piece |
| Alloy Welded Long Radius Returns | FOB Price: US $1-5000 / Piece |
| Buttweld LR U Bend | FOB Price: US $0.11-999 / Piece |
| Different Sizes of Long Radius 45 Degree Elbow | FOB Price: US $500-600 / Piece |
| Butt Weld LR Return | FOB Price: US $1.2-2500 / Piece |
| Carbon Steel Long Radius 180° Elbow | FOB Price: US $0.5-500 / Piece |
| High Nickel Alloy Buttweld LR Elbow | FOB Price: US $1000-2000 / Ton |
For the latest prices on Long Radius Elbows and U-Bend Pipe Fittings, call us now
Long‐radius elbows are ubiquitous in piping systems across many sectors. In oil & gas and petrochemical plants, LR elbows (often carbon or stainless steel) connect pipelines, refineries, and chemical units.
These pipe bend elbows handle crude oil, natural gas, fuels and process fluids under high pressure/temperature. In water and wastewater systems, LR elbows (PVC, carbon steel, or ductile iron) appear in large water mains and treatment plants to maintain flow efficiency. Building plumbing and municipal water lines use PVC or copper LR elbows to reduce turbulence and avoid pressure drop.
In HVAC and air systems, 45° or 90° LR elbows (usually galvanized or aluminum) redirect airflow quietly and efficiently; the curved shape minimizes air resistance and noise.
Power plants and industrial process facilities use LR elbows (including alloy steel for boilers/steam lines) for smooth circulation of steam, condensate, and cooling fluids.
Other applications include chemical and food processing (corrosion-resistant stainless LR elbows), marine and shipbuilding (copper and duplex LR elbows for fuel/water), and construction/firefighting systems (fire sprinkler networks with LR brass/copper elbows). In each case, the goal is a leak-free, durable 90°/45° turn that preserves flow – as one industry guide notes, “the long radius elbow helps to minimize turbulence…and allows for the more efficient flow of materials
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