Short radius elbow

Short Radius Elbow

Short radius elbows, as their name suggests, are more compact in design. These fittings have a bend radius equal to the pipe diameter, making them ideal for applications where space is limited. Unlike long radius elbows, which provide a smoother flow, short radius elbows create sharper turns, making them suitable for low-pressure systems and tight spaces.

Table of contents

  • SR Elbow Specification
  • Short Radius 90 Degree Elbow Dimensions
  • 45 Degree SR Elbow Dimensions
  • ASME B16.9 Short Radius Elbow Dimensions Inches
  • Short Radius Elbow Formula
  • SS Short Radius Elbow Applications
  • Long Radius VS Short Radius Elbow
  • 90 Deg Short Radius Elbow Weight Chart
  • Types of Short Radius Elbow
  • Inconel Buttweld SR Elbow Tolerance
  • Marking for Nickel Alloy Buttweld SR Elbow
  • ANSI B16.9 SR Elbows Fittings Materials and Grades

ASME B16.9 SR Elbow Manufacturer in India

ASME B16.9 SR Elbows are commonly available in 90-degree configurations. They create a sharper turn compared to long radius elbows. These fittings are manufactured according to the standards set by the American Society of Mechanical Engineers (ASME), ensuring precise specifications such as pressure ratings, markings, dimensions, surface finishes, tolerances, and testing procedures.

Following ASME B16.9 guidelines ensures that these fittings meet industry standards for quality and performance.

SR Elbow Specification

SR Elbow Specification

Short Radius Elbow Size
  • Seamless Elbow : 1/2 to 24 inch
  • Welded Elbow : 1/2 to 48 inch
ASME B16.9 Short Radius Elbow Manufacturing Type
  • Seamless
  • Welded
  • ERW
  • Fabricated
Thickness
  • Schedule 5S to 160
Dimensions Standard
  • ASME B16.9
  • MSS-SP-43
  • ASME B16.28
Type
  • 90 Degree
  • 45 Degree
  • 180 Degree
  • 1D
  • 3D
  • 5D
Short Radius Elbow 45 Degree Material
  • Stainless Steel
  • Duplex & Super Duplex Steel
  • Carbon Steel
  • Alloy Steel
  • Nickel Alloy
3/8 NPT Street Elbow Certificates
  • MTC EN 10204 3.1/3.2
  • 100% Radiography Test Report
  • Raw Materials Certificate
  • Third Party Inspection Report
  • NACE MR0175
  • NACE TM-0284
  • NACE MR0103
  • ISO 15156
3/4 Street Elbow Origin
  • Japanese
  • Korean
  • Indian
  • Russian
  • Ukraine
  • USA
  • European
45 Deg SR Elbow Pressure Class
  • 150# to 2500#
Connection Type
  • Threaded
  • Weld
  • Clamp End
Short Radius Elbow Standard
  • EN
  • DIN
  • ASTM
  • ASME
  • JIS
Manufacturing Method
  • Pressing
  • Hot Forming
  • Hamming
  • Flat rolling
  • Pipe rolling
  • Shape rolling
  • Hot mandrel bending
  • Piercing
Thickness Tolerance
  • +/-12.5%
90 Degree SR Elbow Testing
  • Ultrasonic test
  • PMI
  • HIC tested
  • MT

Short Radius 90 Degree Elbow Dimensions

Short Radius 90 Degree Elbow Dimensions

NPS in inch Center to End
B
Outer Diameter
D
1 25 33.4
1¼ 32 42.2
1½ 38 48.3
2 51 60.3
2½ 64 73
3 76 88.9
3½ 89 101.6
4 102 114.3
5 127 141.3
6 152 168.3
8 203 219.1
10 254 273
12 305 323.8
14 356 355.6
16 406 406.4
18 457 457
20 508 508
22 559 559
24 610 610

Short radius reducing elbows are manufactured in size range of 1/2 to 48 inch

The wide size range of short radius reducing elbows allows for seamless connections between different pipe diameters in a piping system. This helps ensure smooth fluid flow by avoiding restrictions and providing accurate transitions between various pipe sizes used in plumbing and industrial applications.

The table below provides you with the dimensions or size range of short radius elbows.

45 Degree SR Elbow Dimensions

45 Degree SR Elbow Dimensions

NPS in inch Outer Diameter
D
45°
3D
Center to End
A
45°
SR
Center to End
A
1/2 21.3 – 38
1 33.4 76 38
1½ 48.3 114 57
2 60.3 152 76
3 88.9 229 114
4 114.3 305 152
6 168.3 457 229
10 273 762 381
14 355.6 1067 533
18 457 1372 686
22 559 1676 838
26 660 1981 991
30 762 2286 1143
34 864 2591 1295
38 965 2896 1448
42 1067 3200 1600
44 1118 3353 1676
46 1168 3505 1753
48 1219 3658 1829

ASME B16.9 Short Radius Elbow Dimensions Inches

ASME B16.9 Short Radius Elbow Dimensions Inches

Nominal Size OD at Bevel Center to End
in. A

in.

1 1.32 1
1 1/4 1.66 1.25
1 1/2 1.90 1.50
2 2.38 2
2 1/2 2.88 2.50
3 3.50 3
3 1/2 4 3.50
4 4.50 4
5 5.56 5
6 6.62 6
8 8.62 8
10 10.75 10
12 12.75 12
14 14 14
16 16 16
18 18 18
20 20 20
22 22 22
24 24 24

In SR Elbow radius is the same as pipe diameter (R=D)

This means that the curvature of the SR elbow matches the pipe diameter. This design offers a compact and efficient way to change the direction of fluid flow in piping systems. The consistent radius reduces the need for additional fastening steps while ensuring smooth flow between the pipe and the elbow.

Short Radius Elbow Formula

Short Radius Elbow Formula

90 degree short radius elbows are used in conditions where the corners are relatively sharp

Its compact structure makes it ideal for applications where space is limited, such as when navigating obstacles or when the piping system needs to change direction quickly. It reduces the overall length of the piping run, which is essential for compact installations.

SS Short Radius Elbow Applications

  • Oil and Gas Pipeline
  • Water Supply Systems
  • Chemical Industry
  • Power Plant
  • Fabrication Industry
  • Structural Pipe
  • Paper & Pulp Industry
  • Food Processing Industry
45 deg sr elbow creates a relatively large pressure drop as compared to long radius elbow

This results in less smooth fluid flow compared to long radius elbows. Therefore, SR elbows are not as widely used. However, they are still employed in situations where flow rate is not critical, or where fluids are moved over long distances with multiple directional changes. These elbows cause greater friction loss and may require larger pumping equipment.

Long Radius VS Short Radius Elbow

Description Long Radius Short Radius Elbow
Size 1.5 times greater diameter  1 times greater diameter 
Bend radius Larger Small
Shape Flatter  Compact 
Appearance  Curved curve Sharper curve
Flow resistance Small resistance Greater resistance
Effects of fluid flow Smooth fluid flow Turbulence flow
Application  Chemical industry, oil and gas industries Used where the flow is turbulence
Advantages Heavy than short radius Lighter than a long radius
Cost More expensive than a short radius Less expensive than a long radius
Pressure Loss High Low

90 Deg Short Radius Elbow Weight Chart

NPS Weight In Kilogram
1/2 .08
1 .18
1 1/2 .41
2 .73
3 2.27
4 4.08
6 11.11
10 39.92
14 72.57
18 117.93
22 178.72
26 249.48
36 481.72

Types of Short Radius Elbow

short radius 90 degree elbow

Short Radius 90 Degree Elbow

45 Degree SR Elbow

45 Degree SR Elbow

3D Short Radius Elbows

3D Short Radius Elbows

ASME B16.9 5D Short Radius Elbow

ASME B16.9 5D Short Radius Elbow

Buttweld Short Radius Pipe Elbow

Buttweld Short Radius Pipe Elbow

1.5D Schedule 10 SR Elbows

1.5D Schedule 10 SR Elbows

Inconel Buttweld SR Elbow Tolerance

NPS 32 to 48 26 to 30 20 to 24 10 to 18
OD
at Bevel (D)
+ 6.4
– 4.8
+ 6.4
– 4.8
+ 6.4
– 4.8
+ 4
– 3.2
ID at End 4.8 3.2
Center to End 3D (A/B) 6 6 3 3
Center to End LR (A/B) 5 3 2 2
NPS 5 to 8 4 3 to 3.1/2 1/2 to 2.1/2
OD
at Bevel (D)
+ 2.4
– 1.6
1.6 1.6 + 1.6
– .8
ID at End 1.6 .8
Center to End 3D (A/B) 3 3 3 3
Center to End LR (A/B) 2 2 2 2

Marking for Nickel Alloy Buttweld SR Elbow

Marking for Nickel Alloy Buttweld SR Elbow

ANSI B16.9 SR Elbows Fittings Materials and Grades

Material Standards and Grade
Carbon Steel Short Radius Elbow
  • ASTM A105
  • ASTM A350 LF2
  • ASTM A694.
  • DIN 1.0402
  • DIN 1.0619
Alloy Steel Short Radius Elbow
  • ASTM A182 F5
  • F9
  • F11
  • F22
  • F91
Stainless Steel Short Radius Elbow
  • ASTM A403 WP304
  • F304L
  • F316
  • F316L
  • F317 / 317L
  • F321 / 321H
  • F347
Inconel 90 Degree Short Radius Pipe Elbow
  • 600
  • 601
  • 625
  • 718
  • X750
Copper Nickel Short Radius 90 Degree Elbow
  • C70600 – 90/10
  • C71500 – 70/30
Hastelloy Short Radius Reducing Elbow
  • C22
  • C276
  • C4
  • B2
  • X
  • B3
Nickel Alloy SR Elbow
  • 200
  • 201
Duplex Short Radius Elbow
  • S31803
  • S32205
Super Duplex SR 45 deg Elbow
  • S32760
  • S32750
Incoloy SR Elbow
  • 825
  • 800
  • 800H
  • 800HT
Titanium Short Radius 90 Degree Elbows
  • Grade 1
  • Grade 2
  • Grade 4
  • Grade 5
  • Grade 7

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