... :GB/AMSE/ANSI B16.9/B 16.28 Types:Elbow,seamless LR&SR Dimensions: 1/2"up to 36" wall thickness ... , or according to customer s requirement.Type Butt-welded seamless carbon steel pipe elbow.Wall thicknessSCH10, SCH20, SCH30, SCH40, STD, SCHXS, SCH80 ...