ANSI/ASME B16.5 Class 150 Flange Bolting Dimensions

Hex Bolts, Stud Bolts for ANSI / ASME B16.5 Class 150 Flanges

Templates for Drilling Class 150 Flanges

Templates for Drilling Class 150 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. Stud Bolts Machine Bolts
2mm Raised Face Ring Joint 2mm Raised Face
1/2 90 60.3 5/8 4 1/2 55 ... 50
3/4 100 69.9 5/8 4 1/2 65 ... 50
1 110 79.4 5/8 4 1/2 65 75 55
1 1/4 115 88.9 5/8 4 1/2 70 85 55
1 1/2 125 98.4 5/8 4 1/2 70 85 65
2 150 120.7 3/4 4 5/8 85 95 70
2 1/2 180 139.7 3/4 4 5/8 90 100 75
3 190 152.4 3/4 4 5/8 90 100 75
3 1/2 215 177.8 3/4 8 5/8 90 100 75
4 230 190.5 3/4 8 5/8 90 100 75
5 255 215.9 7/8 8 3/4 95 110 85
6 280 241.3 7/8 8 3/4 100 115 85
8 345 298.5 7/8 8 3/4 110 120 90
10 405 362 1 12 7/8 115 125 100
12 485 431.8 1 12 7/8 120 135 100
14 535 476.3 1 1/8 12 1 135 145 115
16 595 539.8 1 1/8 16 1 135 145 115
18 635 577.9 1 1/4 16 1 1/8 145 160 125
20 700 635.0 1 1/4 20 1 1/8 160 170 140
24 815 749.3 1 3/8 20 1 1/4 170 185 150
NOTES :
  • Dimension of Table 7 are in Millimeters, except for diameters of bolts and bolts holes, which are in inch units.
  • 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.

The Information contained in this data sheet is for reference purpose only and actual data may vary from product to product. Complete rely on these values for product design is not recommended. User will be solely responsible for any failure in intended construction.