ASME/ANSI B16.5 Class 1500 SW

Nominal Pipe Size  Outside Diameter of Flange Diameter of Raised Face Thickness of Flanges Min. Diameter of Hub Length Through Hub Bore Depth of Socket Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approxi-mate Weight kgs
NPS O R tf X Y B1 B2 STD D W      
1/2 120 34.9 22.3 38 32 22.2 32.0 10 82.6 22.2 4 1.63
3/4 130 42.9 25.4 44 35 27.7 35.0 11 88.9 22.2 4 2.25
1 150 50.8 28.6 52 41 34.5 41.0 13 101.6 25.4 4 3.37
1 1/4 160 63.5 28.6 64 41 43.2 41.0 14 111.1 25.4 4 4.04
1 1/2 180 73.0 31.8 70 44 49.5 44.0 16 123.8 28.6 4 5.66
2 215 92.1 38.1 105 57 61.9 57.0 17 165.1 25.4 8 9.96
2 1/2 245 104.8 41.3 124 64 74.6 64.0 19 190.5 28.6 8 14.29


Standards, Dimensions & Weight of SW Flanges

The Socket Welding Flange is attached to the pipe by a fillet weld around the hub of the flange.

This is eliminates any restriction in flow when using a socket welding flange.

Details of Lap Joint Flange

Most common flange types

Regardless of custom sizing or specifications, the fundamental design of most flanges falls under six common styles created to close, connect, cover, or support pipes and pipe systems.



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