Universal Bolt Torque Values for 1/16" thick Ring Gaskets - ANSI B16.47 Class 75# Series B 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.)
26.00	26.00	27.75	73.88	36	0.63	120	12120	5906	<145	4642	94	5906	120
28.00	28.00	29.75	79.37	40	0.63	120	12120	6108	<145	4725	93	6108	120
30.00	30.00	31.75	84.87	44	0.63	120	12120	6283	<145	4808	92	6283	120
32.00	32.00	33.75	90.37	48	0.63	120	12120	6438	<145	4890	91	6438	120
34.00	34.00	35.75	95.87	52	0.63	120	12120	6574	<145	4973	91	6574	120
36.00	36.00	38.00	116.24	40	0.75	200	18120	6235	<145	4870	156	6235	200
38.00	38.00	40.00	122.52	40	0.75	200	18120	5916	<145	4942	167	5916	200
40.00	40.00	42.00	128.81	44	0.75	200	18120	6190	<145	5015	162	6190	200
42.00	42.00	44.00	135.09	48	0.75	200	18120	6438	<145	5087	158	6438	200
44.00	44.00	46.25	159.48	36	0.88	320	25140	5675	<145	4982	281	5675	320
46.00	46.00	48.25	166.55	40	0.88	320	25140	6038	<145	5047	267	6038	320
48.00	48.00	50.25	173.62	44	0.88	320	25140	6371	<145	5111	257	6371	320
50.00	50.00	52.25	180.69	44	0.88	320	25140	6122	<145	5176	271	6122	320
52.00	52.00	54.25	187.76	48	0.88	320	25140	6427	<145	5240	261	6427	320
54.00	54.00	56.25	194.83	48	0.88	320	25140	6194	<145	5304	274	6194	320
56.00	56.00	58.25	201.90	40	1.00	490	33060	6550	<145	5369	402	6550	490
58.00	58.00	60.50	232.67	44	1.00	490	33060	6252	<145	5247	411	6252	490
60.00	60.00	62.50	240.53	44	1.00	490	33060	6048	<145	5304	430	6048	490