SLIP-ON FLANGE, CLASS 150 PRESSURE CLASS, NOMINAL SIZE 4 IN, OUTSIDE DIAMETER 9 IN, NOMINAL BORE SIZE 4.57 IN, THICKNESS 0.88 IN, FLAT FACE, 8-1/2" BOLT CIRCLE DIAMETER, NUMBER OF BOLTS: 8, BOLT HOLE DIAMETER 3/4 IN, MATERIAL: FORGED STEEL, MATERIAL STANDARD: ASTM A105 / ASME SA105, MAXIMUM PRESSURE: 285 PSI, TEMPERATURE RATING: -20 TO 11 DEG F, INDUSTRY STANDARDS: ASME B16.5, IMPORT MATERIAL