Imperial Pipe - Flange Bolt Chart - Size & Torque

Flange Bolting Chart

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

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

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

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

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

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

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