ASME/ANSI B16.5 Class 300 SW

The socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension. The counterbore is slightly larger than the O.D. of the matching pipe, allowing the pipe to be inserted into the flange similar to a slip-on flange.

The diamter of the smaller bore is the same as the I.D. of the matchine pipe A restriction is built into the bottom of the bore which sets as a shoulder for the pipe to rest on. This is eliminates any restriction in flow when using a socket welding flange.


Nominal Pipe Size Outside Diameter of FlangeDiameter of Raised FaceThickness of Flanges Min.Diameter of HubLength Through HubBoreDepth of SocketDiameter of Bolt CircleDiameter of Bolt HolesNumber of BoltsApproxi-mate Weight kgs
NPSORtfXYB1B2DWIn 
1/29534.912.7382122.215.81066.715.940.67
3/411542.914.3482427.720.91182.619.141.11
112550.815.9542534.526.61388.919.141.43
1 1/413563.517.5642543.235.11498.419.141.79
1 1/215573.019.1702949.540.916114.322.242.57
216592.120.7843261.952.517127.019.183.01
2 1/2190104.823.91003774.662.719149.222.284.55
3210127.027.01174190.777.921168.322.286.18

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