ASME B16.9 90 Degree Elbow Dimensions and Weight Chart

A 90 Degree Elbow is one of the most widely used butt weld pipe fittings in piping systems. It is designed to change the flow direction by 90 degrees and is commonly manufactured according to the ASME B16.9 standard.

ASME B16.9 90° elbows are widely used in:

• Oil & Gas pipelines
• Petrochemical plants
• Power generation facilities
• Refineries
• Water treatment systems
• Industrial process piping

Weight information is extremely important for:

• Transportation planning
• Pipe fitting handling
• Cost estimation
• Lifting calculations
• Packing and shipping arrangements

Most butt weld elbows are manufactured according to the ASME B16.9 dimensional standard, and standard elbow weights are commonly referenced as shown below.

ASME B16.9 90 Degree Elbow Dimensions

An ASME B16.9 90 Degree Elbow is a standard butt weld pipe fitting used to change the direction of flow by 90 degrees in a piping system. These elbows are manufactured according to the ASME B16.9 standard and are widely used in oil & gas, petrochemical, power generation, and industrial piping systems.

The most common types are:

• 90° Long Radius Elbow (LR)
• 90° Short Radius Elbow (SR)

What Is a Long Radius (LR) Elbow?

A Long Radius elbow has a centerline radius equal to:

$R=1.5D$

Where:

• R = Centerline Radius
• D = Nominal Pipe Size

LR elbows provide smoother flow characteristics and lower pressure drop.

What Is a Short Radius (SR) Elbow?

A Short Radius elbow has a centerline radius equal to:

$R=D$

SR elbows are generally used where installation space is limited.

ASME B16.9 90° Long Radius Elbow Dimensions

ASME B16.9 90° Short Radius Elbow Dimensions

ASME B16.9 Elbow Dimensional Terminology

Weight Chart for ASME B16.9 90° Long Radius Elbows – Schedule STD

Note:
All weights are approximate values and may vary depending on the manufacturer, production method, and dimensional tolerances.

Weight Chart for ASME B16.9 90° Long Radius Elbows – Schedule XS

Note:
All weights listed above are estimated values for reference purposes only.

How to Calculate the Weight of a 90 Degree Elbow

The approximate weight of a butt weld elbow can be calculated based on:

• Outside Diameter
• Wall Thickness
• Radius
• Elbow Angle

Please note that actual fitting weight may vary depending on the manufacturer and production process. The ASME B16.9 standard specifies dimensions and tolerances but does not provide official fitting weights.

Weight Formula for 90° Elbows

The approximate formula for calculating elbow weight is:

W = 0.0387 \times S \times (D – S) \times R \div 1000

Where:

• W = Weight (kg/piece)
• S = Wall Thickness (mm)
• D = Outside Diameter (mm)
• R = Elbow Radius
  • Long Radius (LR) = 1.5D
  • Short Radius (SR) = 1D

Example Calculation

Example fitting:

90 Degree Elbow LR Seamless 6” SCH 40 BW ASTM A234 WPB

Known dimensions:

• Outside Diameter (D) = 168.3 mm
• Wall Thickness (S) = 7.11 mm
• Radius (R) = 1.5 × 168.3

Calculation:

W = 0.0387 \times 7.11 \times (168.3 – 7.11) \times 1.5 \times 168.3 \div 1000

Result:

W \approx 11\ \text{kg/piece}

Therefore, the approximate weight of a 6” SCH 40 long radius elbow is about 11 kg per piece.

Related Standards

Common standards related to butt weld elbows include:

• ASME B16.9
• ASTM A234 WPB
• ASTM A403 WP304 / WP316
• MSS SP-75
• ASME B16.25

Common Elbow Types

• 90 Degree Long Radius Elbow (LR)
• 90 Degree Short Radius Elbow (SR)
• 45 Degree Elbow
• 180 Degree Return Bend
• Seamless Elbow
• Welded Elbow

Download ansi-b16-9-pipe-elbow-dimensions