Class 250 Flanges
Class 250 (300 psi*)
Class 250 Weld Neck Flange Class 250 Slip On Flange
Weld Neck Slip-On
                             
    Bore LTH Drilling Weights
Nom.  Size OD  Thickness OD of RF Dia at Base WN SO Weld Neck SO Bolt Circle Bolt Length Hole Dia # Holes Weld Neck Slip-on Blind
  O T  R X B2 B L2 L              
26 38.25 2.81 32.44 30.50 Texas Flange Flanges 26.25 5.81 4.75 34.50 10.00 1.88 28 534 531 916
28 40.75 2.94 34.94 33.00 28.25 5.94 5.00 37.00 10.25 1.88 28 629 637 1095
30 43.00 3.00 37.19 35.25 30.25 6.00 5.00 39.25 10.50 1.88 28 702 707 1236
32 45.25 3.12 39.44 37.50 32.25 6.12 5.12 41.50 10.75 1.88 28 793 801 1424
34 47.50 3.25 41.44 39.50 34.25 6.25 5.25 43.50 11.25 1.88 28 882 889 1649
36 50.00 3.38 43.69 41.50 36.25 6.38 5.38 46.00 12.00 2.13 32 969 970 1884
38 52.25 3.44 45.69 43.50 38.25 6.44 5.50 48.00 12.00 2.13 32 1057 1062 2094
40 54.25 3.56 47.94 45.75 40.25 6.56 5.50 50.25 12.25 2.13 36 1158 1172 2336
42 57.00 3.69 50.44 47.75 42.25 6.94 5.62 52.75 12.50 2.125 36 1318 1288 2673
44 59.25 3.75 52.69 49.75 44.25 7.00 5.75 55.00 12.75 2.13 36 1423 1397 2935
46 61.50 3.88 54.94 51.75 46.25 7.12 5.88 57.25 13.00 2.13 40 1536 1510 3272
48 65.00 4.00 58.44 54.00 48.25 7.25 6.00 60.75 13.25 2.13 40 1824 1797 3768
Dimensions are in inches.  Weights are in pounds.
Note:  *AWWA Pressure rating at atmospheric temperature is 300 psi.  These flanges have the same OD and drilling as ANSI/ASME B16.1 class 250 cast iron pipe and flanged fittings.

Class 250 Flange PDF (for printing).