butt weld elbows
Elbow
The function of an elbow is to change the direction or flow in a piping system. By default, there are 5 opportunities, 45°, 90° and 180° elbows, all three in the long radius version, and 90° and 180° elbows in the short radius version.
Standard: ASTM B16.9/16.5/16.47A/16.47B B2220 – 2001, SH3408, SH3409,GBT12459, GB/T13401
Production process: Cold extrusion & Hot extrusion forming.
Type: 45º, 90º, 180º (R=1D, 1.5D, 3D, 5D,6D,8D...),
Dimension: 1/8" to 48"
Material: Carbon steel, Alloy Steel, Stainless steel.
Long Radius and Short Radius
The elbowsare divided into two groups which define the distance at which they change direction; the centerline at one end to the other side. This is called the center to face distance and corresponds to the radius of the elbow bend.
The center-to-face distance for long radius elbows, abbreviated LR is always 1.1/2 x Nominal Pipe Size (NPS) (1.1/2D), while the center-to-face distance for short radius elbows, abbreviated SR even is the nominal pipe size.
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