The function of a 45 degree elbow is the same as a 90 degree elbow, but the measurement of dimensions is different to that of the 90 degree elbow. The radius of a 45 degree elbow is the same as the radius of the 90 degree L.R. elbow where ‘R’ equals 1½D. However, the centre to face dimension is not equivalent the radius as in 90 degree L.R. elbows. This is measured from each face to the point of intersection of the centre lines perpendicular to each other. This is due to the smaller degree of bend.
45 degree elbow, also called "45 bends or 45 ells" are typically made as LR (Long Radius) elbows. Available in various sizes (in mm or inches), 45 degree pipe elbow is available with different male to female BSP thread connections. Providing a wide choice of colors, these elbows can be manufactured to meet different specifications, in terms of size and diameter.
| Stainless steel elbow | : | ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L |
| Carbon steel elbow | : | ASTM A 234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70 |
| Duplex steel elbow | : | ASTM A 815 UNS NO S 31803, S 32205 |
| Alloy steel elbow | : | ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91 |
| Low temperature carbon steel elbow | : | ASTM A420 WPL3 / A420WPL6 |
