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Class 300 Standard Connections Flanges

Equal Barrel "E"

LONG WELD NECK “LWN”

Heavy Barrel "HB"

Size  Flange  Barrel OD  Bolting  Nut  Stud Bolt  Weights     Length
NomBore LWN & EBore HBODThkRF of ODLWNHBE# ofHolesHole SizeBolt CircleStop DiaRelief DiaRelief LengthSizeRF LengthRTJ LengthLWN HB E Base
 BTDDD  CNSNRNL   BasePer  1″BasePer  1″BasePer  1″
 1/20.50.553.750.561.381.51.753.7540.622.621.751.50.751/2 2 1/23   50.470.6243.19
 3/40.750.744.620.621.691.882.194.6240.753.252.191.880.885/8 3   3 1/290.7110.9374.69
110.964.880.6922.122.444.8840.753.52.442.120.885/8 3 1/43 1/290.8121.1405.19
1 1/41.251.285.250.752.52.52.815.2540.753.882.812.50.885/8 3 1/43 3/4131151.4455.89
1 1/21.51.56.120.812.882.753.256.1240.884.53.252.7513/4 3 1/24   151.2211.9617.89
221.946.50.883.623.313.946.580.7553.943.310.885/8 3 1/24 1/4201.5282.6688.59
2 1/22.52.327.514.123.944.627.580.885.884.623.9413/4 4   4 1/2252.1383.689119
332.98.251.1254.625.388.2580.886.625.384.6213/4 4 1/45   352.7494.6106139
3 1/23.53.3691.195.55.256980.887.2565.2513/4 4 1/45   423.4595.5122159
443.83101.256.195.756.621080.887.886.625.7513/4 4 1/25 1/4623.8916.52071912
554.81111.387.31781180.889.258713/4 4 3/45 1/4845.31249.12412112
665.7612.51.448.58.129.3812.5120.8810.629.388.1213/4 4 3/45 3/41056.7165123032712
887.62151.6210.6210.2511.56151211311.5610.251.127/8 5 1/26 1/41489.1228174053612
10109.5617.51.8812.7512.6213.6217.5161.1215.2513.6212.621.2516 1/47 1/421013291214994612
121211.3820.521514.7515.94 20.5161.2517.7515.9414.751.381 1/8 6 3/47 1/227516392286516112
141414232.1216.2516.7518.4423201.2520.2518.4416.751.381 1/8 7   7 3/432419456327857412
16161625.52.2518.51920.525.5201.3822.520.5191.51 1/4 7 1/28 1/240423529379148812
181818282.38212122.7528241.3824.7522.75211.51 1/4 7 3/48 1/44652663043106610212
20202030.52.52323.122530.5241.38272523.121.51 1/4 8 1/49 1/45493074150122811812
242424362.7527.2527.6229.6236241.623229.6227.621.751 1/2 9 1/410 1/477842101667162716012

Dimensions are in inches. Weights are in pounds.
Class 300 Standard Connection Flange PDF (for printing).