U Bends Manufacturers | ASME/ANSI B16.9, ANSI B16.28, MSS-SP-43
A Buttweld U pipe bend is a specialized piping component designed to create a 180-degree change in direction within a piping system, forming a "U" shape. It is primarily used in applications where a sharp return or redirection of flow is necessary, such as in heat exchangers, power plants, and chemical processing industries. These bends are crafted to ensure a smooth, uninterrupted flow of fluids or gases, reducing pressure loss and turbulence.
The manufacturing of U bends involves advanced processes such as cold bending, hot induction bending, or welding. In the cold bending method, the pipe is bent without the application of heat, making it suitable for smaller diameters and thinner-walled pipes. Hot induction bending, on the other hand, uses controlled heating to soften the material, allowing for precise bending without compromising the material's strength or integrity. The pipes are then welded into a U-shape and carefully inspected to ensure that they meet the required standards for angle, bend radius, and wall thickness.
U pipe bends are favored for their durability and ability to handle high-pressure and high-temperature environments. They offer advantages like space efficiency, smooth flow characteristics, and long-term performance. The flexibility in customizing U pipe bends to specific dimensions and materials makes them ideal for a variety of industrial applications, where reliability and optimal fluid flow are critical.
At Ample Alloys, we work closely with clients to understand their specific project requirements. Whether it's a standard U pipe bend or a custom-designed solution, we provide expert advice and guidance to ensure that the product meets the exact needs of your application. Our flexible approach allows us to deliver tailored solutions in a timely manner, helping clients meet their project deadlines without compromising on quality.
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ASME B16.9 U Pipe Bends 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 / ERW / Welded / Fabricated.
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.
U Pipe Bends Dimensions
| Nominal Pipe Diameter (NPD) | Radius (R) | Leg Length (L) | Overall Length (OL) | Hole Diameter (D) | Width (W) | Plate Thickness (T) |
|---|---|---|---|---|---|---|
| 1/2 inch (12.7 mm) | 3/4 inch (19.05 mm) | 1 inch (25.4 mm) | 2.75 inch (69.85 mm) | As per Specification | Dependent on Design | Customizable |
| 3/4 inch (19.05 mm) | 1.125 inch (28.58 mm) | 1.5 inch (38.1 mm) | 4.125 inch (104.78 mm) | As per Specification | Dependent on Design | Customizable |
| 1 inch (25.4 mm) | 1.5 inch (38.1 mm) | 2 inch (50.8 mm) | 7 inch (177.8 mm) | As per Specification | Dependent on Design | Customizable |
| 1.25 inch (31.75 mm) | 1.875 inch (47.63 mm) | 2.5 inch (63.5 mm) | 10.25 inch (260.35 mm) | As per Specification | Dependent on Design | Customizable |
| 1.5 inch (38.1 mm) | 2.25 inch (57.15 mm) | 3 inch (76.2 mm) | 14.5 inch (368.3 mm) | As per Specification | Dependent on Design | Customizable |
| 2 inch (50.8 mm) | 3 inch (76.2 mm) | 4 inch (101.6 mm) | 20 inch (508 mm) | As per Specification | Dependent on Design | Customizable |
| 2.5 inch (63.5 mm) | 3.75 inch (95.3 mm) | 5 inch (127 mm) | 27.5 inch (699.3 mm) | As per Specification | Dependent on Design | Customizable |
| 3 inch (76.2 mm) | 4.5 inch (114.3 mm) | 6 inch (152.4 mm) | 36 inch (914.4 mm) | As per Specification | Dependent on Design | Customizable |
| 4 inch (101.6 mm) | 6 inch (152.4 mm) | 8 inch (203.2 mm) | 48 inch (1219.2 mm) | As per Specification | Dependent on Design | Customizable |
| 5 inch (127 mm) | 7.5 inch (190.5 mm) | 10 inch (254 mm) | 62.5 inch (1587.5 mm) | As per Specification | Dependent on Design | Customizable |
| 6 inch (152.4 mm) | 9 inch (228.6 mm) | 12 inch (304.8 mm) | 78 inch (1981.2 mm) | As per Specification | Dependent on Design | Customizable |
| 8 inch (203.2 mm) | 12 inch (304.8 mm) | 16 inch (406.4 mm) | 104 inch (2641.6 mm) | As per Specification | Dependent on Design | Customizable |
| 10 inch (254 mm) | 15 inch (381 mm) | 20 inch (508 mm) | 140 inch (3556 mm) | As per Specification | Dependent on Design | Customizable |
| 12 inch (304.8 mm) | 18 inch (457.2 mm) | 24 inch (609.6 mm) | 180 inch (4572 mm) | As per Specification | Dependent on Design | Customizable |
| 14 inch (355.6 mm) | 21 inch (533.4 mm) | 28 inch (711.2 mm) | 224 inch (5681.6 mm) | As per Specification | Dependent on Design | Customizable |
| 16 inch (406.4 mm) | 24 inch (609.6 mm) | 32 inch (812.8 mm) | 288 inch (7315.2 mm) | As per Specification | Dependent on Design | Customizable |
| 18 inch (457.2 mm) | 27 inch (685.8 mm) | 36 inch (914.4 mm) | 324 inch (8234.4 mm) | As per Specification | Dependent on Design | Customizable |
| 20 inch (508 mm) | 30 inch (762 mm) | 40 inch (1016 mm) | 360 inch (9144 mm) | As per Specification | Dependent on Design | Customizable |
| 24 inch (609.6 mm) | 36 inch (914.4 mm) | 48 inch (1219.2 mm) | 120 inch (3048 mm) | As per Specification | Dependent on Design | Customizable |
SS U Pipe Bend Tolerance
| Parameter | Tolerance |
|---|---|
| Bend Angle | ±1° |
| Bend Radius | ±5% of the specified radius |
| Wall Thickness | ±10% of the specified thickness |
| Ovality (Out-of-Roundness) | ±3% of the pipe OD |
| Length of Tangent | ±5% of the specified tangent length |
| Centerline Radius | ±5% of the specified radius |
| Pipe Diameter | ±2% of the specified nominal diameter |
| Straightness | ±1% of the overall length of the bend |
| Angle of Return | ±1° of the required return angle |
U Shaped Pipe Bend - Standard Specifications
U pipe bends standard specifications help ensure that U pipe bends perform efficiently under the required conditions and meet all industry standards for safety and reliability. It is important to follow these guidelines during manufacturing and testing to maintain the product’s integrity and functionality.
- 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 U Pipe Bend Welded!
When you select Ample Alloys for your U pipe bend needs, you can expect dependable, top-notch products tailored to your exact specifications. Our commitment to delivering superior quality, along with unparalleled customer support and technical expertise, ensures that you receive solutions that exceed expectations every time.
Quality Control System
Ensuring excellence through a rigorous Quality Control System that meets the highest industry standards.
Highly Professional Staff
Backed by a team of highly professional staff, we deliver exceptional service and expertise to meet your industry needs.
100% Satisfaction Guarantee
Experience peace of mind with our 100% Satisfaction Guarantee, ensuring top-quality products and services that exceed your expectations.
Accurate Testing Processes
Utilizing precise and accurate testing processes to ensure the highest quality and compliance with industry standards.
- Efficient Fluid Flow: U pipe bends allow for smooth changes in flow direction with minimal turbulence.
- Compact Design: They help save space in confined spaces like heat exchangers and compact piping systems.
- Customization: U pipe bends can be custom-manufactured to meet specific design and space constraints.
The standard radius for U pipe bends is usually 1.5D to 3D, where D is the nominal diameter of the pipe. Custom bend radii can also be designed depending on specific project requirements.
U pipe bends have a 180-degree bend angle, but other angles, such as 90 degrees or 45 degrees, can be manufactured based on project needs.
