DIMENSIONS OF RING JOINT FACING ASME B16.47

Nominal Pipe Size Groove Number Groove Dimensions Diameter of Raised Portion
Class 300 Class 400 Class 600 Class 900 Pitch Diameter Depth Width Radius at Bottom
P E F R K
in. 26 26 26 R93 29.5 0.5 0.781 0.06 31.88
mm 749.3 12.7 19.84 1.5 809.8
in. 28 28 28 R94 31.5 0.5 0.781 0 06 33.88
mm 800.1 12.7 19.84 1.5 860.6
in. 30 30 30 R95 33.75 0.5 0.781 0.06 36.12
mm 857.25 12.7 19.84 1.5 917.4
in. 32 32 32 R96 36 0.562 0.906 0.06 38.75
mm 914.4 14.27 23.01 1.5 984.3
in. 34 34 34 R97 38 0.562 0.906 0.06 40.75
mm 965.2 14.27 23.01 1.5 1035.1
in. 36 36 36 R98 40.25 0.562 0.906 0.06 43
mm 1022.35 14.27 23.01 1.5 1092.2
in. 26 R100 29.5 0.688 1.188 0.09 32.75
mm 749.3 17.48 30.18 2.3 831.9
in. 28 R101 31.5 0.688 1.312 0.09 35
mm 800.1 17.48 33.32 2.3 889
in. 30 R102 33.75 0.688 1.312 0.09 37.25
mm 857.25 17.48 33.32 2.3 946.2
in. 32 R103 36 0.688 1.312 0.09 39.5
mm 914.4 17.48 33.32 2.3 1003.3
in. 34 R104 38 0.812 1.438 0.09 42
mm 965.2 20.62 36.53 2.3 1066.8
in. 36 R105 40.25 0.812 1 438 0.09 44.25
mm 1022.35 20.62 36.53 2.3 1124

Tolerances (inches):                         Tolerances (mm):

P   (pitch diameter) ±0.0005             P   (pitch diameter) ±0.13

E   (depth) +0.026, -0.000                E   (depth) +0.40, -0.00

F   (width) ±0.008                             F   (width) ±0.20

R   (radius at bottom) max.              R   (radius at bottom) max.

23 deg. (angle) ±1/2 deg.                23 deg. (angle) ±1/2 deg.

 

 

(1) Height of raised portion is equal to the depth of groove dimension E, but is not subjected to the tolerances for E. Full face contour may be used.

(a) Ring joint gaskets are not  contemplated for NPS 38 and larger flanges.