Long Radius Elbow

Name: Long Radius Elbow
Brand: Cangzhou Silver Valley technology Co., LTD

Long radius elbows refer to elbows whose curvature radius is equal to 1.5 times the outer diameter of the pipe, that is, R=1.5D.

Key Features of a Long Radius Elbow:

1. Radius of Curvature:The radius of a long radius elbow is typically 1.5 times the nominal pipe size (NPS). For example, for a 4-inch pipe, the radius of the elbow would be 6 inches.

In some cases, the radius can be up to 3 times the nominal pipe size, depending on the application and standards.

2. Smooth Flow Transition:The longer radius provides a gentler curve, which reduces pressure drop and turbulence in the flow. This makes it ideal for applications where fluid efficiency is critical.

3. Applications:Long radius elbows are commonly used in systems where low resistance to flow is required, such as in high-pressure pipelines, slurry transport, and pneumatic conveying systems.

They are also preferred in applications involving viscous fluids or where erosion and corrosion are concerns.

4. Standards:Long radius elbows are manufactured according to various standards, such as ASME B16.9 (for welded fittings) and ASME B16.11 (for threaded and socket-weld fittings).

5. Materials:They can be made from a variety of materials, including carbon steel, stainless steel, alloy steel, and other materials depending on the application.

What is Long Radius Elbow

A long radius elbow is a type of pipe fitting designed to change the direction of fluid flow in a piping system. The key feature of a long radius elbow is its curvature radius, which is 1.5 times the nominal pipe diameter (1.5D). This design provides a smoother flow transition compared to short radius elbows, reducing turbulence and pressure drop.

Parameter of a Long Radius Elbow:

Parameter	Description
Radius of Curvature	Equal to the nominal pipe diameter (1D)
Angle	Commonly available in 45掳, 90掳, and 180掳 configurations
Material	Available in various materials including carbon steel, stainless steel, and alloy steel
Size Range	Typically ranges from 1/2" to 48"
Wall Thickness	Available in different schedules (e.g., SCH 10, SCH 40, SCH 80, SCH 160)
Surface Finish	Smooth, polished finish to reduce corrosion and ensure efficient fluid flow
Connection Method	Usually connected by welding, but can also be threaded or flanged

Difference Between Long Radius Elbow And Short Radius Elbow

Difference Between Long Radius Elbow And Short Radius Elbow
Feature	Long Radius Elbow (LR)	Short Radius Elbow (SR)
Radius of Curvature	1.5D (or up to 3D)	1D
Flow Characteristics	Smoother flow, lower pressure drop	Sharper curve, higher pressure drop
Space Requirements	Requires more space	Requires less space
Applications	High-pressure, slurry, viscous fluids	Compact systems, low-pressure systems
Pressure Drop	Lower	Higher
Cost	More expensive	Less expensive

Standards of a Long Radius Elbow:

Long radius elbows are typically manufactured to meet industry standards such as:

ANSI/ASME B16.9: Factory-Made Wrought Buttwelding Fittings

ASTM A234: Wrought Carbon Steel and Alloy Steel Fittings for Medium-Pressure Service

DIN 2615: German standard for pipe fittings

JIS B2311: Japanese Industrial Standard for pipe fittings

Applications of a Long Radius Elbow:

Industrial Piping Systems: Used in oil and gas, chemical processing, and power generation.

HVAC Systems: Ideal for air and fluid distribution in heating, ventilation, and air conditioning systems.

Water Supply Systems: Commonly used in municipal water supply and distribution networks.

Food and Beverage Industry: Used in systems where hygiene and cleanliness are critical.

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We specialize in the production of seamless steel pipes, boiler pipes, oil casing and pipe fittings，If you have any inquiry, please feel free to contact us.

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