Flange Bolting Chart

Flange Bolt Chart - Bolt Lengths, Wrench Sizes & Torque Patterns

Valves

150 LB. Flanges

Nominal Pipe Size Wrench Size Number of Studs Diameter of Studs Length of Stud - RF Length of Stud - RTJ Suggested Torque
1/2 7/8 4 0.5 2-1/4 30
3/4 7/8 4 0.5 2-1/2 30
1 7/8 4 0.5 2-1/2 3 40
1-1/4 7/8 4 0.5 2-3/4 3-1/4 40
1-1/2 7/8 4 0.5 2-3/4 3-1/4 40
2 1-1/16 4 0.63 3-1/4 3-3/4 80
2-1/2 1-1/16 4 0.63 3-1/2 4 80
3 1-1/16 4 0.63 3-1/2 4 110
3-1/2 1-1/16 8 0.63 3-1/2 4 80
4 1-1/16 8 0.63 3-1/2 4 100
5 1-1/4 8 0.75 3-3/4 4-1/4 120
6 1-1/4 8 0.75 4 4-1/2 130
8 1-1/4 8 0.75 4-1/4 4-3/4 130
10 1-7/16 12 0.88 4-1/2 5 215
12 1-7/16 12 0.88 4-3/4 5-1/4 220
14 1-5/8 12 1 5-1/4 5-3/4 320
16 1-5/8 16 1 5-1/4 5-3/4 320
18 1-13/16 16 1.13 5-3/4 6-1/4 450
20 1-13/16 20 1.13 6-1/4 6-3/4 450
24 2 20 1.25 6-3/4 7-1/4 650

300 LB. Flanges

Nominal Pipe Size Wrench Size Number of Studs Diameter of Studs Length of Stud - RF Length of Stud - RTJ Suggested Torque
1/2 7/8 4 0.5 2-1/2 3 40
3/4 1-1/16 4 0.63 3 3-1/2 60
1 1-1/16 4 0.63 3 3-1/2 80
1-1/4 1-1/16 4 0.63 3-1/4 3-3/4 80
1-1/2 1-1/4 4 0.75 3-1/2 4 110
2 1-1/16 8 0.63 3-1/2 4 110
2-1/2 1-1/4 8 0.75 4 4-1/2 150
3 1-1/4 8 0.75 4-1/4 4-3/4 150
3-1/2 1-1/4 8 0.75 4-1/4 5 150
4 1-1/4 8 0.75 4-1/2 5 180
5 1-1/4 8 0.75 4-3/4 5-1/4 180
6 1-1/4 12 0.75 4-3/4 5-1/2 170
8 1-7/16 12 0.88 5-1/2 6 265
10 1-5/8 16 1 6-1/4 6-3/4 320
12 1-13/16 16 1.13 6-3/4 7-1/4 450
14 1-13/16 20 1.13 7 7-1/2 450
16 2 20 1.25 7-1/2 8 650
18 2 24 1.25 7-3/4 8-1/4 650
20 2 24 1.25 8 8-3/4 650
24 2-3/8 24 1.5 9 10 1200

600 LB. Flanges

Nominal Pipe Size Wrench Size Number of Studs Diameter of Studs Length of Stud - RF Length of Stud - RTJ Suggested Torque
1/2 7/8 4 0.5 3 3 40
3/4 1-1/16 4 0.63 3-1/2 3-1/2 60
1 1-1/16 4 0.63 3-1/2 3-1/2 80
1-1/4 1-1/16 4 0.63 3-3/4 3-3/4 110
1-1/2 1-1/4 4 0.75 4-1/4 4-1/4 110
2 1-1/16 8 0.63 4-1/4 4-1/4 110
2-1/2 1-1/4 8 0.75 4-3/4 4-3/4 150
3 1-1/4 8 0.75 5 5 150
3-1/2 1-7/16 8 0.88 5-1/2 5-1/2 200
4 1-7/16 8 0.88 5-3/4 5-3/4 225
5 1-5/8 8 1 6-1/2 6-1/2 350
6 1-5/8 12 1 6-3/4 6-3/4 320
8 1-13/16 12 1.13 7-1/2 7-3/4 450
10 2 16 1.25 8-1/2 8-1/2 650
12 2 20 1.25 8-3/4 8-3/4 675
14 2-5/8 20 1.38 9-1/4 9-1/4 820
16 2-3/8 20 1.5 10 10 1125
18 2-9/16 20 1.63 10-3/4 10-3/4 1430
20 2-9/16 24 1.63 11-1/4 11-1/2 1400
24 2-15/16 24 1.88 13 13-1/4 2230

900 LB. Flanges

Nominal Pipe Size Wrench Size Number of Studs Diameter of Studs Length of Stud - RF Length of Stud - RTJ Suggested Torque
1/2 1-1/4 4 0.75 4-1/4 4-1/4 80
3/4 1-1/4 4 0.75 4-1/2 4-1/2 90
1 1-7/16 4 0.88 5 5 110
1-1/4 1-7/16 4 0.88 5 5 170
1-1/2 1-5/8 4 1 5-1/2 5-1/2 240
2 1-7/16 8 0.88 5-3/4 5-3/4 170
2-1/2 1-5/8 8 1 6-1/4 6-1/4 240
3 1-7/16 8 0.88 5-3/4 5-3/4 215
4 1-13/16 8 1.13 6-3/4 6-3/4 450
5 2 8 1.25 7-1/2 7-1/2 650
6 1-13/16 12 1.13 7-1/2 7-3/4 455
8 1-3/16 12 1.38 8-3/4 8-3/4 820
10 2-3/16 16 1.38 9-1/4 9-1/4 850
12 2-3/16 20 1.38 10 10 870
14 2-5/8 20 1.5 10-3/4 11 1125
16 2-9/16 20 1.63 11-1/4 11-1/2 1430
18 2-15/16 20 1.88 12-3/4 13-1/4 2230
20 3-1/8 20 2 13-3/4 14-1/4 2300
24 3-7/8 20 2.5 17-1/4 18 5500

1500 LB. Flanges

Nominal Pipe Size Wrench Size Number of Studs Diameter of Studs Length of Stud - RF Length of Stud - RTJ Suggested Torque
1/2 1-1/4 4 0.75 4-1/4 4-1/4 80
3/4 1-1/4 4 0.75 4-1/2 4-1/2 90
1 1-7/16 4 0.88 5 5 110
1-1/4 1-7/16 4 0.88 5 5 170
1-1/2 1-5/8 4 1 5-1/2 5-1/2 240
2 1-7/16 8 0.88 5-3/4 5-3/4 170
2-1/2 1-5/8 8 1 6-1/4 6-1/4 240
3 1-13/16 8 1.13 7 7 370
4 2 8 1.25 7-3/4 7-3/4 650
5 2-3/8 8 1.5 9-3/4 9-3/4 1000
6 2-3/16 12 1.38 10-1/4 10-1/2 820
8 2-9/16 12 1.63 11-1/2 12-3/4 1400
10 2-15/16 12 1.88 13-1/4 13-1/2 2100
12 3-1/8 16 2 14-3/4 15-1/4 2300
14 3-1/2 16 2.25 16 16-3/4 3400
16 3-7/8 16 2.5 17-1/2 18-1/2 4300
18 4-1/4 16 2.75 19-1/2 20-3/4 6200
20 4-5/8 16 3 21-1/4 22-1/4 7800
24 5-3/8 16 3.5 24-1/4 25-1/2 13000

2500 LB. Flanges

Nominal Pipe Size Wrench Size Number of Studs Diameter of Studs Length of Stud - RF Length of Stud - RTJ Suggested Torque
1/2 1-1/4 4 0.75 4-3/4 4-3/4 150
3/4 1-1/4 4 0.75 5 5 150
1 1-7/16 4 0.88 5-1/2 5-1/2 170
1-1/4 1-5/8 4 1 6 6 300
1-1/2 1-13/16 4 1.13 6-3/4 6-3/4 400
2 1-5/8 8 1 7 7 300
2-1/2 1-13/16 8 1.13 7-3/4 8 400
3 2 8 1.25 8-3/4 9 600
4 2-3/8 8 1.5 10 10-1/4 650
5 2-3/4 8 1.75 11-3/4 12-1/4 1500
6 3-1/8 8 2 13-1/2 14 2300
8 3-1/8 12 2 15 15-1/2 2400
10 3-7/8 12 2.5 19-1/4 20 4900
12 4-1/4 12 2.75 21-1/4 22 7900

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