Manufacturer of Buttweld LR/SR 45° Elbow Fittings | ASME/ANSI B16.9, ANSI B16.28, MSS-SP-43
A Buttweld 45 Degree Elbow serves a similar purpose as a 90° elbow, but it differs in dimensional measurements. The radius of a 45° elbow matches that of a 90° Long Radius (LR) elbow (1½D), but the "center-to-face" dimension is not the same as the radius, unlike 90° LR elbows. This dimension is measured from each end face to the intersection point of the centerlines that form a right angle. The difference arises due to the smaller angle of the bend. Notably, 45° elbows are only available in long radius; short radius 45° elbows do not exist.
45° elbows are manufactured in a wide range of materials, including carbon steel, stainless steel, alloy steel, and non-ferrous metals, to suit different pressure and temperature conditions. Due to their geometry, 45-degree elbows are often used when the pipeline design needs to avoid obstacles or fit within tight spaces while still allowing for gentle directional shifts. ASME B16.9 45 Degree Elbow manufactured in various sizes, typically ranging from ½ inch to 48 inches in diameter, with different wall thicknesses according to standard schedules (e.g., SCH 10, SCH 40, SCH 80).
Ample Alloys, certified with ISO 9001:2015, ISO 14001:2015, OHSAS 18000:2007, and PED, is a leading manufacturer and stockist of Buttweld 45° Elbows. We offer a diverse range of elbows in materials like Stainless Steel, Carbon Steel, Alloy Steel, Duplex Steel, Super Duplex, Nickel Alloys, Monel, Copper Nickel, Hastelloy, and more. Our ASME B16.9 elbows are available in seamless or welded forms, catering to the Oil & Gas, Power Generation, Petrochemical, and Industrial Construction sectors. With a focus on quality, our products are engineered for durability, reliability, and superior surface finish, meeting international standards at competitive prices.
High Quality 45° Pipe Elbow, Stainless, Carbon, Alloy Steel 45 Deg Elbow, ANSI B16.9 45 Deg Pipe Fittings Elbow, Schedule 10 45 Degree Elbow, A403 SS 45 Deg Elbows, Buttweld 45 Deg. Elbow, ANSI B16.9 45 Degree Pipe Fittings Elbow
Butt weld 45° Pipe Elbow Specifications
Size Range
1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
Wall Thickness
Sch 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, XS, 100, 120, 140, 160, Sch XXS
Stainless Steel
ASTM A403 WP 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.
Standards / Dimension
ASME B16.9, ASME B16.28, MSS SP-43, MSS SP-75, ASTM A234, ASTM A403, DIN 2605, 2615, 2616, 2617, 10253.
Type / Form
Seamless, Welded, Fabricated / 45 Deg Long Radius Elbow, Short Radius Elbow.
Alloy Steel
ASTM A234, WP1, WP5, WP9, WP11, WP22, WP91, etc.
Bending Radius
R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Carbon Steel
ASTM A234, A420, MSS-SP-75, WPB, WPL3, WPL6, WPHY 42, WPHY 46, WPHY 52, WPHY 56, WPHY 60, WPHY 65, WPHY 70
Duplex & Super Duplex
ASTM A815 / A815M, UNS S31803 / 2205, UNS S32205, UNS S32101 / LDX 2101, UNS S32750 / 2507, UNS S32760, UNS S32550 / Ferralium 255.
Buttweld 45 degree Elbow Dimensions
| NPS | O.D. D |
45° Long Rad Center to End B |
45° 3D Center to End B |
| 1/2 | 21.3 | 16 | … |
| 3/4 | 26.7 | 19 | 24 |
| 1 | 33.4 | 22 | 31 |
| 1¼ | 42.2 | 25 | 39 |
| 1½ | 48.3 | 29 | 47 |
| 2 | 60.3 | 35 | 63 |
| 2½ | 73 | 44 | 79 |
| 3 | 88.9 | 51 | 95 |
| 3½ | 101.6 | 57 | 111 |
| 4 | 114.3 | 64 | 127 |
| 5 | 141.3 | 79 | 157 |
| 6 | 168.3 | 95 | 189 |
| 8 | 219.1 | 127 | 252 |
| 10 | 273 | 159 | 316 |
| 12 | 323.8 | 190 | 378 |
| 14 | 355.6 | 222 | 441 |
| 16 | 406.4 | 254 | 505 |
| 18 | 457 | 286 | 568 |
| 20 | 508 | 318 | 632 |
| 22 | 559 | 343 | 694 |
| 24 | 610 | 381 | 757 |
| 26 | 660 | 406 | 821 |
| 28 | 711 | 438 | 883 |
| 30 | 762 | 470 | 964 |
| 32 | 813 | 502 | 1010 |
| 34 | 864 | 533 | 1073 |
| 36 | 914 | 565 | 1135 |
| 38 | 965 | 600 | 1200 |
| 40 | 1016 | 632 | 1264 |
| 42 | 1067 | 660 | 1326 |
| 44 | 1118 | 695 | 1389 |
| 46 | 1168 | 727 | 1453 |
| 48 | 1219 | 759 | 1516 |
45° Elbow Tolerance ASME B16.9
| Nominal Pipe Size | 1/2 to 2½ | 3 to 3½ | 4 | 5 to 8 |
| Outside Diameter at Bevel (D) |
+ 1.6 – 0.8 |
1.6 | 1.6 | + 2.4 – 1.6 |
| Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
| Center to End LR (A/B) | 2 | 2 | 2 | 2 |
| Center to End 3D (A/B) | 3 | 3 | 3 | 3 |
| Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Diameter at Bevel (D) |
+ 4 – 3.2 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Inside Diameter at End | 3.2 | 4.8 | + 6.4 – 4.8 |
+ 6.4 – 4.8 |
| Center to End LR (A/B) | 2 | 2 | 3 | 5 |
| Center to End 3D (A/B) | 3 | 3 | 6 | 6 |
| Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Common Buttweld 45° Elbow Standards
A comprehensive list of 45° Elbow pipe fittings standards commonly used across industries like Oil & Gas, Petrochemical, Chemical, Power, and Water Treatment. These standards specify requirements for dimensions, materials, testing, and quality assurance.
- ASME Standards:
- ASME B16.9: Factory-Made Wrought Buttwelding Fittings.
- ASME B16.25: Buttwelding Ends (preparation of ends for welding).
- ASME Standards: Wrought Steel Buttwelding Short Radius Elbows and Returns.
- ASTM Standards:
- ASTM A234: Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High-Temperature Service.
- ASTM A403: Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings.
- ASTM A815: Standard Specification for Wrought Ferritic, Ferritic/Austenitic (Duplex), and Martensitic Stainless Steel Piping Fittings.
- ASTM A860: Standard Specification for High-Strength Low-Alloy Welded Fittings (commonly used in pipelines with high strength requirements).
- API Standards:
- API 5L: Specification for Line Pipe (not directly for fittings but related to pipe material in oil and gas industries).
- API 6A: Specification for Wellhead and Christmas Tree Equipment (covers piping components but specific to high-pressure environments in oil fields).
- MSS (Manufacturers Standardization Society) Standards:
- MSS SP-43: Wrought and Fabricated Butt-Welding Fittings for Low-Pressure, Corrosion Resistant Applications (commonly used for stainless steel in low-pressure applications).
- MSS SP-75: Specification for High-Strength Wrought, Butt-Welding Fittings (used in oil and gas for high-strength requirements).
- MSS SP-79: Socket-Welding Reducer Inserts.
- MSS SP-83: Carbon Steel Pipe Unions, Socket Welding, and Threaded.
- DIN (Deutsches Institut für Normung) Standards (European):
- DIN 2605: Steel Elbows for Butt Welding (elbows dimensions and tolerances).
- DIN 2615: Tees for Butt Welding.
- DIN 2616: Reducers for Butt Welding.
- DIN 2617: Caps for Butt Welding.
- EN (European Norms) Standards:
- EN 10253-1: Butt-Welding Pipe Fittings Made of Non-Alloy and Alloy Steels.
- EN 10253-2: Butt-Welding Pipe Fittings with Specified Elevated Temperature Properties.
- EN 10253-3: Butt-Welding Pipe Fittings Made of Austenitic and Austenitic-Ferritic (Duplex) Stainless Steel.
- EN 10253-4: Butt-Welding Pipe Fittings for Low-Pressure Applications.
- JIS (Japanese Industrial Standards):
- JIS B2311: Steel Pipe Fittings for Butt-Welding.
- JIS B2312: Cast Iron Pipe Fittings for Butt-Welding.
- JIS B2313: Malleable Iron Pipe Fittings for Butt-Welding.
- ISO (International Standards Organization) Standards:
- ISO 5251: Specifications for Butt-Welding Ends for Steel Pipe Fittings (compatible with ISO pipes and equipment globally).
- ISO 15590: Petroleum and Natural Gas Industries — Induction Bends, Fittings, and Flanges for Pipeline Transportation Systems.
- BS (British Standards):
- BS 1640: Steel Butt-Welding Pipe Fittings for the Petroleum Industry.
- BS 3799: Forged Fittings, Screwed, and Socket-Welding for the Petroleum Industry
Why Ample Alloys for 45 Degree Elbows!
Our extensive inventory includes seamless and welded 45 deg elbow fittings, ready for immediate dispatch to meet urgent project requirements. Backed by a team of skilled professionals and state-of-the-art manufacturing facilities, Ample Alloys ensures reliable, durable, and cost-effective piping solutions for critical applications.
Quality Control System
Ensuring excellence through a rigorous Quality Control System that meets the highest industry standards.
100% Satisfaction Guarantee
Experience peace of mind with our 100% Satisfaction Guarantee, ensuring top-quality products and services that exceed your expectations.
Highly Professional Staff
Backed by a team of highly professional staff, we deliver exceptional service and expertise to meet your industry needs.
Accurate Testing Processes
Utilizing precise and accurate testing processes to ensure the highest quality and compliance with industry standards.
- Smooth Flow Transition: The 45° angle ensures a smoother flow path compared to sharper angles, reducing turbulence and pressure drop.
- Long Radius Design: Typically available in long radius (1.5D), providing a gradual change in direction, minimizing erosion and wear.
- Wide Material Selection: Available in a variety of materials like Stainless Steel, Carbon Steel, Alloy Steel, Duplex Steel, Super Duplex Steel, Nickel Alloys, Monel, Copper Nickel, and Hastelloy, to suit different pressure, temperature, and corrosion resistance requirements.
- Seamless and Welded Options: Offered in both seamless and welded forms to meet diverse project needs.
- Standard Compliance: Manufactured as per international standards like ASME B16.9, ANSI B16.9, ensuring quality and reliability.
45 Degree Elbows are commonly used in various industries such as oil & gas, petrochemical, power generation, water treatment, and HVAC systems. They help in changing the direction of flow efficiently while minimizing turbulence and pressure drop.
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Long Radius (LR) 45 Degree Elbow: This type has a centerline radius that is 1.5 times the nominal pipe diameter (1.5D). It provides a gentler change in flow direction, reducing pressure loss and flow resistance. LR elbows are more commonly used due to their ability to handle higher pressure and flow rates. Available in sizes from ½ inch to 48 inches and various schedules (e.g., SCH 10, SCH 40, SCH 80, SCH 160).
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Short Radius (SR) 45 Degree Elbow: The SR elbow has a centerline radius equal to the nominal pipe diameter (1D). These are less common for 45-degree angles and are typically used in tight spaces where pipeline flexibility is limited. However, SR 45-degree elbows are not widely manufactured due to their limited applications. Typically available in limited sizes, usually smaller diameters, as these are used in specific, space-constrained applications.
