ANSI/ASME B16.5 Class 1500 Flange Bolting Dimensions

ASME B16.5 Class 1500

Templates for Drilling Class 1500 Flanges

Templates for Drilling Class 1500 Flanges
Nominal Pipe Size, NPS Outside Diameter of Flange, O Drilling Length of Bolts, L
Diameter of Bolt Circle, W Diameter of Bolts Holes, in. Number of Bolts Diameter of Bolts, in. Raised Face 0.25 in. Male and Female/ Tongue and Groove Ring Joint
1/2 4.75 3.25 7/8 4 3/4 4.25 4.00 4.25
3/4 5.12 3.50 7/8 4 3/4 4.50 4.25 4.50
1 5.88 4.00 1 4 7/8 5.00 4.75 5.00
1 1/4 6.25 4.38 1 4 7/8 5.00 4.75 5.00
1 1/2 7.00 4.88 1 1/8 4 1 5.50 5.25 5.50
2 8.50 6.50 1 8 7/8 5.75 5.50 5.75
2 1/2 9.62 7.50 1 1/8 8 1 6.25 6.00 6.25
3 10.50 8.00 1 1/4 8 1 1/8 7.00 6.75 7.00
4 12.25 9.50 1 3/8 8 1 1/4 7.75 7.50 7.75
5 14.75 11.50 1 5/8 8 1 1/2 9.75 9.50 9.75
6 15.50 12.50 1 1/2 12 1 3/8 10.25 10.00 10.50
8 19.00 15.50 1 3/4 12 1 5/8 11.50 11.25 12.75
10 23.00 19.00 2 12 1 7/8 13.25 13.00 13.50
12 26.50 22.50 2 1/8 16 2 14.75 14.50 15.25
14 29.50 25.00 2 3/8 16 2 1/4 16.00 15.75 16.75
16 32.50 27.75 2 5/8 16 2 1/2 17.50 17.25 18.50
18 36.00 30.50 2 7/8 16 2 3/4 19.50 19.25 20.75
20 38.75 32.75 3 1/8 16 3 21.25 21.00 22.25
24 46.00 39.00 3 5/8 16 3 1/2 24.25 24.00 25.50
NOTES :
  • Dimension are in inches.
  • Length of stud bolts does not include the height of the points.
  • Bolt lengths not shown in table may be determined in accordance with Annex D.