Carbon steel 90 degree elbows change flow direction in welded piping systems with minimal pressure loss. Designed to ASME B16.9 and made from ASTM A234 WPB material, this butt-welded elbow measures 6 inch (DN150) with SCH 80 wall thickness for high-strength performance. It suits oil and gas transmission, power plants, and structural pipelines where thick-wall carbon steel fittings must handle elevated pressure and mechanical stress.