Dimensions of Class 300-600 Ring Type Joint (RTJ) Flanges

Expired

All dimensions are in "mm" unless noted otherwise.

Dimensions of Class 300 and Class 600 Ring Joint (RTJ) Flanges as per ASME B16.5.

Ring Joint Flange Dimensions

Nominal Pipe
Size
(inches)		 Pitch Dia of
Ring and Groove		 Width of Ring Height of Ring Width of Flat on
Octagonal Rings		 Width of Groove Depth of Groove Dia of
Raised Face		 Ring Number Approx. gap
between flanges
 after gasket compression (X)
Oval Octagonal
P A B H C F E K (min) Class 300 Class 600
1/2 34.14 6.4 11.1 9.5 4.3 7.1 5.6 51.0 R11 3.0 3.0
3/4 42.88 8.0 14.3 12.7 5.2 8.7 6.4 63.5 R13 4.1 4.1
1 50.80 8.0 14.3 12.7 5.2 8.7 6.4 69.8 R16 4.1 4.1
1-1/4 60.33 8.0 14.3 12.7 5.2 8.7 6.4 79.2 R18 4.1 4.1
1-1/2 68.28 8.0 14.3 12.7 5.2 8.7 6.4 90.4 R20 4.1 4.1
2 82.55 11.1 17.5 15.9 7.7 11.9 7.9 108.0 R23 5.6 4.8
2-1/2 101.60 11.1 17.5 15.9 7.7 11.9 7.9 127.0 R26 5.6 4.8
3 123.82 11.1 17.5 15.9 7.7 11.9 7.9 146.0 R31 5.6 4.8
3-1/2 131.78 11.1 17.5 15.9 7.7 11.9 7.9 159.0 R34 5.6 4.8
4 149.22 11.1 17.5 15.9 7.7 11.9 7.9 175.0 R37 5.6 4.8
5 180.98 11.1 17.5 15.9 7.7 11.9 7.9 210.0 R41 5.6 4.8
6 211.12 11.1 17.5 15.9 7.7 11.9 7.9 241.0 R45 5.6 4.8
8 269.88 11.1 17.5 15.9 7.7 11.9 7.9 302.0 R49 5.6 4.8
10 323.85 11.1 17.5 15.9 7.7 11.9 7.9 356.0 R53 5.6 4.8
12 381.00 11.1 17.5 15.9 7.7 11.9 7.9 413.0 R57 5.6 4.8
14 419.10 11.1 17.5 15.9 7.7 11.9 7.9 457.0 R61 5.6 4.8
16 469.90 11.1 17.5 15.9 7.7 11.9 7.9 508.0 R65 5.6 4.8
18 533.40 11.1 17.5 15.9 7.7 11.9 7.9 575.0 R69 5.6 4.8
20 584.20 12.7 19.1 17.5 8.7 13.5 9.5 635.0 R73 5.6 4.8
24 692.15 15.9 22.2 20.7 10.5 16.7 11.1 749.0 R77 6.4 5.6
Hits: 4304