ASME/ANSI B16.5 Class 300 SO

Pipe flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.

The Slip-on flange has a low hub because the pipe slips into the flange prior to welding. It is welded both inside and out to provide sufficient strength and prevent leakage.Slip-on flanges are all bored slightly larger than the O.D. of the pipe.


Nominal Pipe Size Outside Diameter of FlangeDiameter of Raised FaceThickness of Flanges Min.Diameter of HubLength Through HubBoreDiameter of Bolt CircleDiameter of Bolt HolesNumber of BoltsApproxi-mate Weight kgs
NPSORtfXYBWIn
1/29534.912.7382122.266.715.940.65
3/411542.914.3482427.782.619.141.08
112550.815.9542534.588.919.141.39
1 1/413563.517.5642543.298.419.141.74
1 1/215573.019.1702949.5114.322.242.49
216592.120.7843261.9127.019.182.90
2 1/2190104.823.91003774.6149.222.284.35
3210127.027.01174190.7168.322.285.89
3 1/2230139.728.613343103.4184.222.287.48
4255157.230.214646116.1200.022.289.77
5280185.733.417849143.8235.022.2812.31
6320215.935.020651170.7269.922.21216.07
8380269.939.726060221.5330.225.41224.07
10445323.846.132165276.2387.428.61634.38
12520381.049.337571327.0450.831.81649.80
14585412.852.442575359.2514.431.82070.12
16650469.955.648381410.5571.534.92089.56
18710533.458.853387461.8628.634.924108.10
20775584.262.058794513.1685.834.924134.87
24915692.268.3702105616.0812.841.324202.58
Note: 2 mm raised face regularly furnished on Classes 150 and 300 unless otherwise ordered.

Nominal Pipe Size Outside Diameter of FlangeDiameter of Raised FaceThickness of Flanges Min.Diameter of HubLength Through HubBoreDiameter of Bolt CircleDiameter of Bolt HolesNumber of BoltsApproximate Weight kgs
NPSORtfXYBWIn 
1/29034.99.6301422.260.315.940.41
3/410042.911.2381427.769.915.940.59
111050.812.7491634.579.415.940.82
1 1/411563.514.3591943.288.915.940.99
1 1/212573.015.9652149.598.415.941.28
215092.117.5782461.9120.719.142.01
2 1/2180104.820.7902774.6139.719.143.41
3190127.022.31082990.7152.419.143.88
3 1/2215139.722.312230103.4177.819.184.80
4230157.222.313532116.1190.519.185.45
5255185.722.316435143.8215.922.286.22
6280215.923.919238170.7241.322.287.57
8345269.927.024643221.5298.522.2812.42
10405323.828.630548276.2362.025.41216.47
12485381.030.236554327.0431.825.41226.80
14535412.833.440056359.2476.328.61235.21
16595469.935.045762410.5539.828.61644.61
18635533.438.150567461.8577.931.81649.19
20700584.241.355971513.1635.031.82062.62
24815692.246.166381616.0749.334.92088.23

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