90 degree elbow 1. 90D(LR, SR), 45D(LR, SR), 180D... 2.Standard: ... ASME,ASTM,DIN,JIS,EN,MSS,NACE 3.ISO9000-2000 90 ... degree elbow Size:from 1/2" to 72" Angles:45 Deg ... , 90 Deg, 180 DegThickness:SCH20, SCH30, SCH40, STD, SCH80, SCH100. SCH120, ...