Product Name: ASTM A234 WPB Long Radius Elbow
Type: 90 Degree Elbow, Long Radius (LR)
Standard: ASME B16.9
Material: ASTM A234 WPB
Size: 6 Inch
Wall Thickness: SCH STD
End Connection: Butt Weld (BW)

Source: https://www.landee.cn/astm-a234-wpb-long-radius-elbow-90-deg-6-inch-sch-std-bw.html