Universal  Bolt Torque Values for 1/8" thick Ring Gaskets - ANSI B16.47 Class 150# Flanges
Nominal	Raised Face	Raised Face	Gasket	Number	Size of	Bolt Torque	Comp Force	Max. Gasket	Internal	Min. Rec'd	Min. Rec'd	Max. Rec'd/Avail.	Preferred
Pipe Size	Contact I.D.	Contact O.D.	Contact Area	Of	Bolts	at 60ksi Stress	Per Bolt @ 60ksi	Stress Avail.	Pressure	Gasket Stress	Torque/Bolt	Gasket Stress	Torque/Bolt
(in)	(in)	(in)	(sq.in.)	Bolts	(in)	(ft.lbs.)	(lbs.)	(psi)	(psig)	(psi)	(ft.lbs.)	(psi)	(ft.lbs.)
26	26.00	29.50	152.49	24	1.25	1000	55740	8773	<300	5844	666	8773	1000
28	28.00	31.50	163.48	28	1.25	1000	55740	9547	<300	5929	621	9547	1000
30	30.00	33.75	187.66	28	1.25	1000	55740	8317	<300	5929	713	8317	1000
32	32.00	36.00	213.52	28	1.50	1600	84300	11055	<300	5929	858	11055	1600
34	34.00	38.00	226.08	32	1.50	1600	84300	11932	<300	6004	805	11932	1600
36	36.00	40.25	254.39	32	1.50	1600	84300	10604	<300	6000	905	10604	1600
38	38.00	42.25	267.73	32	1.50	1600	84300	10076	<300	6070	964	10076	1600
40	40.00	44.25	281.08	36	1.50	1600	84300	10797	<300	6141	910	10797	1600
42	42.00	47.00	349.33	36	1.50	1600	84300	8688	<300	5989	1103	8688	1600
44	44.00	49.00	365.03	40	1.50	1600	84300	9238	<300	6049	1048	9238	1600
46	46.00	51.00	380.73	40	1.50	1600	84300	8857	<300	6109	1104	8857	1600
48	48.00	53.50	438.23	44	1.50	1600	84300	8464	<300	6038	1141	8464	1600
50	50.00	55.50	455.50	44	1.75	3000	118800	11476	<300	6093	1593	11476	3000
52	52.00	57.50	472.77	44	1.75	3000	118800	11057	<300	6147	1668	11057	3000
54	54.00	59.50	490.04	44	1.75	3000	118800	10667	<300	6201	1744	10667	3000
56	56.00	62.00	555.78	48	1.75	3000	118800	10260	<300	6129	1792	10260	3000
58	58.00	64.00	574.62	48	1.75	3000	118800	9924	<300	6179	1868	9924	3000
60	60.00	66.00	593.46	52	1.75	3000	118800	10409	<300	6229	1795	10409	3000