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Gasket Dimensions for Raise Face to ASME B16.21  

(To suit ASME/ANSI B16.5 and BS 1560 Flanges)
   
Nominal Gasket OUTSIDE DIAMETER
Pipe Inside Class Class Class Class Class Class
Size Diameter 150 300 400 600 900 *1500
               
1/2" 27/32" 1 - 7/8" 2 - 1/8" 2 - 1/8" 2 - 1/8" 2 - 1/2" 2 - 1/2"
3/4" 1 - 1/16" 2 - 1/4" 2 - 5/8" 2 - 5/8" 2 - 5/8" 2 - 3/4" 2 - 3/4"
1" 1 - 5/16" 2 - 5/8" 2 - 7/8" 2 - 7/8" 2 - 7/8" 3 - 1/8" 3 - 1/8"
1 - 1/4" 1 - 21/32" 3" 3 - 1/4" 3 - 1/4" 3 - 1/4" 3 - 1/2" 3 - 1/2"
1 - 1/2" 1 - 29/32" 3 - 3/8" 3 - 3/4" 3 - 3/4" 3 - 3/4" 3 - 7/8" 3 - 7/8"
2" 2 - 3/8" 4 - 1/8" 4 - 3/8" 4 - 3/8" 4 - 3/8" 5 - 5/8" 5 - 5/8"
2 - 1/2" 2 - 7/8" 4 - 7/8" 5 - 1/8" 5 - 1/8" 5 - 1/8" 6 - 1/2" 6 - 1/2"
3" 3 - 1/2" 5 - 3/8" 5 - 7/8" 6 - 7/8" 7 - 7/8" 6 - 5/8" 6 - 7/8"
3 - 1/2" 4" 6 - 3/8" 6 - 1/2" 6 - 3/8" 6 - 3/8" ----- -----
4' 4 - 1/2" 6 - 7/8" 7 - 1/8" 7 " 7 - 5/8" 8 - 1/8" 8 - 1/4"
5" 5 - 9/16" 7 - 3/4" 8 - 1/2" 8 - 3/8" 9 - 1/2" 9 - 3/4" 10"
6" 6 - 5/8" 8 - 3/4" 9 - 7/8" 9 - 3/4" 10 - 1/2" 11 - 3/8" 11 - 1/8"
8" 8 - 5/8" 11" 12 - 1/8" 12" 12 - 5/8" 14 - 1/8" 13 - 7/8"
10" 10 - 3/4" 13 - 3/8" 14 - 1/4" 14 - 1/8" 15 - 3/4" 17 - 1/8" 17 - 1/8"
12" 12 - 3/4" 16 - 1/8" 16 - 5/8" 16 - 1/2" 18" 19 - 5/8" 20 - 1/2"
14" 14" 17 - 3/4" 19 - 1/8" 19" 19 - 3/8" 20 - 1/2" 22 - 3/4"
16" 16" 20 - 1/4" 21 - 1/4" 21 - 1/8" 22 - 1/4" 22 - 5/8" 25 - 1/4"
18" 18" 21 - 5/8" 23 - 1/2" 23 - 3/8" 24 - 1/8" 25 - 1/8" 27 - 3/4"
20" 20" 23 - 7/8" 25 - 3/4" 25 - 1/2" 26 - 7/8" 27 - 1/2" 29 - 3/4"
24" 24" 28 - 1/4" 30 - 1/2" 30 - 1/4" 31 - 1/8" 33" 35 - 1/2"
NOTE:              
*Class 1500 rating is not specified in ASME B16.21    
               
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While based on data believed to be reliable, seller assumes no responsibility.