Product Item: 45/90 Degree Elbow, Pipe Fitting
Type: Elbow
Degree: 45°, 90°
Standard: ASME B16.9
Material: Carbon Steel ASTM A234 WPB
Size: 6 Inch
Schedule: SCH 40
Ends: BW (Butt Weld)
Bend Radius: Long or Short Radius, LR, SR

Source: https://www.landee.cn/asme-b16-9-45-90-degree-elbow-astm-a234-wpb-6-inch-lr-sr.html