... , 310H, 316, 316H, 317, 317L, 321, 321H, 347, 347H 1) ELBOW,8",90DEG.LR,SCH.STD,C.ST,NACE. QTY: 2 NOS ... ., ELBOW, 90 DEG, LONG RADISU, BUTT WELD, 8" X SCH. STD ... FORWARDED FOR KNPC'S APPROVAL PRIOR TO DELIVERY. 1892) ELBOW,12",90 DEG.LR,SCH.STD,C.ST,NACE. QTY: 9 NOS ... APPROVAL PRIOR TO DELIVERY.. American standard pipe fitting 90 degree elbow