a234 wpb astm b 16.9 carbon steel elbow 1.WT:SCH10-XXS 2.Size:1/2"-24",24"-96" 3.Qalification:ISO9001, ... API a234 wpb astm b 16.9 carbon steel ... elbow sizeSeamless:from 1/2" to 24"Welded:from 24" ... deg,90 deg,180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D,4D,5D,6D,7D-40D.thicknessSCH10,SCH20, ...