Elbows

Elbows are used to be installed between two lengths of pipe or tube allowing a change of direction,usually these elbows distinguished by connection ends. The ends of pipe elbows may be machined for butt welding , threaded , or socketed , so the elbows are consist of butt weld,thread elbow, socket elbow and other series.

Elbow Angle:

An elbow angle is defined as an angle by which the flow direction deviates from its original direction.

An elbow is a pipe fitting installed between two lengths of pipe or tubing to allow a change of direction, usually a 90° or 45° angle, though 22.5° elbows are also made. 

The ends may be machined for butt welding, threaded (usually female), or socketed, etc. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow.

Elbow Radius:

1. Long Radius (LR) Elbows – radius is 1.5 times the pipe diameter

2. Short Radius (SR) Elbows – radius is 1.0 times the pipe diameter

3. 90 Degree Elbow – where change in direction required is 90°

4. 45 Degree Elbow – where change in direction required is 45°

Note: L/R – Long radius, S/R – Short radius

End Connections:

The following types of end connections are available for connecting elbow/bend to pipe.

• Socket welded

• Butt welded

• Screwed

• Flanged

Key Specifications/Special Features and Materials::

the material is selected accoding to the application use such as high temperature use,sanitary fitting,regular industrial use etc.

1. Carbon steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6, WPHY-42/46/52/56/60/65/70

2. Stainless steel: ASTM A403 WP304/304L, WP316/316/L, WP321, WP347 and WPS31254

3. Alloy steel: ASTM A234 WP1/WP12/WP11/WP22/WP5/WP7/WP9/WP91

4. Abrasion resistant material:Ceramic lined, Ceramic tile lined , Bi-metal clad pipe,

5. Manufacturing standards: ANSI, ISO, JIS and DIN.

Application of pipe elbows:

Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc.