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: 45, 90, 180 (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 elbows are 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.
45 Elbow
A 45 elbow has the same function as a 90 elbow, but the dimensional measurements are different from those of a 90 elbow.
The radius of a 45 elbow is the same as that of a 90 LR (1.1/2D). However, the center-to-face dimension is not equal to the radius in the 90 LR elbow. This is measured from the intersection of each face to the center line perpendicular to each other at a distance of B on the image. this is due to the smaller curvature. Short radius 45 elbows are not available.
