Nominal Size ANSI Class API Size API Class O.D. (Inches) Bolt Circle (Inches)
1/2" 150# na na 3.5 2.38
3/4" 150# na na 3.88 2.75
1" 150# na na 4.25 3.12
1-1/4" 150# na na 4.62 3.5
1-1/2" 150# na na 5 3.88
2" 150# na na 6 4.75
2-1/2" 150# na na 7 5.5
3" 150# na na 7.5 6
3-1/2" 150# na na 8.5 7
4" 150# na na 9 7.5
5" 150# na na 10 8.5
6" 150# na na 11 9.5
8" 150# na na 13.5 11.75
10" 150# na na 16 14.25
12" 150# na na 19 17
14" 150# na na 21 18.75
16" 150# na na 23.5 21.25
18" 150# na na 25 22.75
20" 150# na na 27.5 25
24" 150# na na 32 29.5
1/2" 300# na na 3.75 2.62
3/4" 300# na na 4.62 3.25
1" 300# na na 4.88 3.5
1-1/4" 300# na na 5.25 3.88
1-1/2" 300# na na 6.12 4.5
2" 300# na na 6.5 5
2-1/2" 300# na na 7.5 5.88
3" 300# na na 8.25 6.62
3-1/2" 300# na na 9 7.25
4" 300# na na 10 7.88
5" 300# na na 11 9.25
6" 300# na na 12.5 10.62
8" 300# na na 15 13
10" 300# na na 17.5 15.25
12" 300# na na 20.5 17.75
14" 300# na na 23 20.25
16" 300# na na 25.5 22.5
18" 300# na na 28 24.75
20" 300# na na 30.5 27
24" 300# na na 36 32
4" 400# na na 10 7.88
5" 400# na na 11 9.25
6" 400# na na 12.5 10.62
8" 400# na na 15 13
10" 400# na na 17.5 15.25
12" 400# na na 20.5 17.75
14" 400# na na 23 20.25
16" 400# na na 25.5 22.5
18" 400# na na 28 24.85
20" 400# na na 30.5 27
24" 400# na na 36 32
1/2" 600# na na 3.75 2.62
3/4" 600# na na 4.62 3.25
1" 600# na na 4.88 3.5
1-1/4" 600# na na 5.25 3.88
1-1/2" 600# na na 6.12 4.5
2" 600# 2-1/16" 2000# 6.5 5
2-1/2" 600# na na 7.5 5.88
3" 600# 3-1/8" 2000# 8.25 6.62
3-1/2" 600# na na 9 7.25
4" 600# 4-1/16" 2000# 10.75 8.5
5" 600# 5-1/8" 2000# 13 10.5
6" 600# 7-1/16" 2000# 14 11.5
8" 600# 9" 2000# 16.5 13.75
10" 600# 11" 2000# 20 17
12" 600# 13-5/8" 2000# 22 19.25
14" 600# na na 23.75 20.75
16" 600# 16-3/4" 2000# 27 23.75
18" 600# 17-3/4" 2000# 29.25 25.75
20" 600# 21-1/4" 2000# 32 28.5
24" 600# na   37 33
1/2" 900# na na 4.75 2.62
3/4" 900# na na 5.12 3.25
1" 900# na na 5.88 3.5
1-1/4" 900# na na 6.25 3.88
1-1/2" 900# na na 7 4.5
2" 900# 2-1/16" 3000# 8.5 5
2-1/2" 900# na na 9.62 5.88
3" 900# 3-1/8" 3000# 9.5 7.5
4" 900# 4-1/16" 3000# 11.5 9.25
5" 900# 5-1/8" 3000# 13.75 11
6" 900# 7-1/16" 3000# 15 12.5
8" 900# 9" 3000# 18.5 15.5
10" 900# 11" 3000# 21.5 18.5
12" 900# 13-5/8" 3000# 24 21
14" 900# na na 25.25 22
16" 900# 16-3/4" 3000# 27.75 24.25
18" 900# 17-3/4" 3000# 31 27
20" 900# 20-3/4" 3000# 33.75 29.5
24" 900#     41 35.5
1/2" 1500# na na 4.75 3.25
3/4" 1500# na na 5.12 3.5
1" 1500# na na 5.88 4
1-1/4" 1500# na na 6.25 4.38
1-1/2" 1500# na na 7 4.88
2" 1500# 2-1/16" 5000# 8.5 6.5
2-1/2" 1500# na na 9.62 7.5
3" 1500# 3-1/8" 5000# 10.5 8
4" 1500# 4-1/16" 5000# 12.25 9.5
5" 1500# 5-1/8" 5000# 14.75 11.5
6" 1500# 7-1/16" 5000# 15.5 12.5
8" 1500# 9" 5000# 19 15.5
10" 1500# 11" 5000# 23 19
12" 1500# na na 26.5 22.5
14" 1500# 13-5/8" 5000# 29.5 25
16" 1500# na na 32.5 27.75
18" 1500# na na 36 30.5
20" 1500# na na 38.75 32.75
24" 1500# na na 46 39
1/2" 2500# na na 5.25 3.5
3/4" 2500# na na 5.5 3.75
1" 2500# na na 6.25 4.25
1-1/4" 2500# na na 7.25 5.13
1-1/2" 2500# na na 8 5.75
2" 2500# na na 9.25 6.75
2-1/2" 2500# na na 10.5 7.75
3" 2500# na na 12 9
4" 2500# na na 14 10.75
5" 2500# na na 16.5 12.75
6" 2500# na na 19 14.5
8" 2500# na na 21.75 17.25
10" 2500# na na 26.5 21.25
12" 2500# na na 30 24.36
           
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Disc Style Flange Protectors :

  • Can be made to any OD and bolt circle with very little lead time
  • Can be made from any sheet material depending on what suits your needs
  • Best option for flanges larger than 14
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DISC STYLE FLANGE PROTECTORS
Serving domestic and global industry by providing innovative PVF, Protective & Logistic solutions.