Dimensions Ring Joint Facings

Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. 

This jointing method can be employed on Weld Neck, Slip-on and Blind Flange.

Dimensions Ring Joint Facings

Nominal SizeGroove DimensionsDiameter of Raised Portion, K
Class 150 NPSClass 300 NPSClass 400 NPSClass 600 NPSClass 900 NPSClass 1500 NPSClass 2500 NPSGroove NumberPitch Diameter, PDepth, EWidth, FRadius at Bottom, RClass 150 NPSClass 300,  600 NPSClass 900 NPSClass 1500 NPSClass 2500 NPS
_ 1/2_ 1/2___R1134.145.547.140.8 51.0   
_____ 1/2_R1239.676.358.740.8   60.5 
_ 3/4_ 3/4__ 1/2R1342.886.358.740.8 63.5  65.0
_____ 3/4_R1444.456.358.740.8   66.5 
1______R1547.636.358.740.863.5    
 1_1_1 3/4R1650.806.358.740.8 70.0 71.573.0
1 1/4______R1757.156.358.740.873.0    
 1 1/4_1 1/4_1 1/41R1860.336.358.740.8 79.5 81.082.5
1 1/2______R1965.076.358.740.882.5    
_1 1/2_1 1/2_1 1/2_R2068.276.358.740.8 90.5 92.0 
______1 1/4R2172.237.9211.910.8    102.0
2______R2282.556.358.740.8102.0    
_2_2__1 1/2R2382.557.9211.910.8 108.0  114.0
_____2_R2495.257.9211.910.8   124.0 
2 1/2______R25101.606.358.740.8121.0    
_2 1/2_2 1/2__2R26101.607.9211.910.8 127.0  133.0
_____2 1/2_R27107.957.9211.910.8   137.0 
______2 1/2R28111.139.5313.490.8    149.0
3______R29114.306.358.740.8133.0    
_(2)_(2)___R30117.487.9211.910.8     
_3 (2)_3 (2)3__R31123.837.9211.910.8 146.0156.0  
______3R32127.009.5313.491.5    168.0
3 1/2______R33131.786.358.740.8154.0    
_3 1/2_3 1/2___R34131.787.9211.910.8 159.0   
_____3_R35136.537.9211.910.8   168.0 
4______R36149.236.358.740.8171.0    
_4444__R37149.237.9211.910.8 175.0181.0  
______4R38157.1811.1316.661.5    203.0
_____4_R39161.937.9211.910.8   194.0 
5______R40171.456.358.740.8194.0    
_5555__R41180.987.9211.910.8 210.0216.0  
______5R42190.5012.7019.841.5    241.0
6______R43193.686.358.740.8219.0    
_____5_R44193.687.9211.910.8   229.0 
_6666__R45211.127.9211.910.8 241.0241.0  
_____6_R46211.149.5313.491.5   248.0 
______6R47228.6012.7019.841.5    279.0
8______R48247.656.358.740.8273.0    
_8888__R49269.887.9211.910.8 302.0308.0  
_____8_R50269.8811.1316.661.5 __318.0_
______8R51279.4014.2723.011.5 ___340.0
10______R52304.806.358.740.8330.0____
_10101010__R53323.857.9211.910.8 356.0362.0__
_____10_R54323.8511.1316.661.5 __371.0_
______10R55342.9017.4830.182.4 ___425.0
12______R56381.006.358.740.8406.0____
_12121212__R57381.007.9211.910.8 413.0429.0__
_____12_R58381.0014.2723.011.5 __438.0_
14______R59396.886.358.740.8425.0____
______12R60406.4017.4833.322.4 ___495.0
_141414___R61419.107.9211.910.8 457.0___
____14__R62419.1011.1316.661.5 _467.0__
_____14_R63419.1015.8826.972.4 __489.0_
16______R64454.036.358.740.8483.0____
_161616___R65469.907.9211.190.8 508.0___
____16__R66469.9011.1316.661.5 _524.0__
_____16_R67469.9017.4830.182.4 __546.0_
18______R68517.536.358.740.8546.0____
_181818___R69533.407.9211.910.8 575.0___
____18__R70533.4012.7019.841.5 _594.0__
_____18_R71533.4017.4830.182.4 __613.0_
20______R72558.806.358.740.8597.0____
_202020___R73584.209.5313.491.5 635.0___
____20__R74584.2012.7019.841.5 _648.0__
_____20_R75584.2017.4833.322.4 __673.0_
24______R76673.106.358.740.8711.0____
_242424___R77692.1511.1316.661.5 749.0___
____24__R78692.1515.8826.972.4 _772.0__
_____24_R79692.1520.6236.532.4 __794.0_
_262626___R93749.3012.7019.841.5810.0
_282828___R94800.1012.7019.841.5861.0
_303030___R95857.2512.7019.841.5917.0
_323232___R96914.4014.2723.011.5984.0
_343434___R97965.2014.2723.011.51035.0
_363636___R981022.3514.2723.011.51092.0
____26__R100749.3017.4830.182.3832.0
____28__R101800.1017.4833.322.3889.0
____30__R102857.2517.4833.322.3946.0
____32__R103914.4017.4833.322.31003.0
____34__R104965.2020.6236.532.31067.0
____36__R1051022.3520.6236.532.31124.0

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A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system.