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ANSI B16.47 Series B Class 300 Flanges

Series B 300 Weld Neck Flange

Series B 300 Blind Flange

(Click any image above to enlarge it and lock it in place, then scroll to the bottom table for dimensions)
ThicknessDrillingWeight
Nom SizeODWeld NeckBlindOD of RFDia at BaseBoreLTHDia BevelBolt CircleBolt LengthHoleDia# of HolesWeld NeckBlind
OCCRXBL2A(1)(2)
2634.123.443.442927.625.6326.1931.6210.51.3832400907
2836.253.443.443129.755.8128.1933.7510.51.38364501023
30393.633.6333.25326.1630.2536.2511.251.5365501249
3241.54435.5346.5632.2538.5121.62326851556
3443.624437.536.126.7534.2540.62121.62367501719
3646.124439.75387.0636.2542.8812.51.75328401921
3848.124.314.3141.75407.5038.2544.88131.75369152257
4050.124.54.543.88427.7540.2546.8813.51.75409902549
4252.54.634.634644842.3149141.883611352876
4454.54.944.944846.198.3844.315114.51.884012353304
4657.555.065048.388.6946.3153.751523614703766
4859.555.2552.2550.318.7548.3155.7515.2524015754183
5061.55.385.4454.2552.389.1950.3157.7515.7524417104629
5263.55.565.6156.2554.449.552.3159.751624818405096
5465.885.325.8158.2556.59.3854.3162.121624819805678
5669.566.1260.558.8110.5056.316517.752.383625956642
5871.9466.3162.7560.9410.7558.3167.44182.384027707347
6073.945.886.56562.9410.6360.3169.44182.384028707980

Dimensions are in inches. Weights are in pounds.

(1)- Bolt lengths are calculated based on bolting one WN to one Blind.
(2)- Bolt diameter should be 1/8″ less than the bolt hole diameter
Note:

Larger sizes as well as intermediate sizes can be furnished.
ANSI B16.47 Series B Class 300 Flange PDF (for printing).