ANSI B16.47 Series B Class 75 Flanges

		Thickness							Drilling				Weight
Nom Size	OD	Weld Neck	Blind	OD of RF	Dia at Base	Bore	LTH	Dia Bevel	Bolt Circle	Bolt Length	Hole Dia	# of Holes	Weld Neck	Blind
	O	C	C	R	X	B	Y	A		(1)	(2)
26	30	1.25	1.25	27.75	26.62		2.25	26.06	28.5	4.5	0.75	36	80	255
28	32	1.25	1.25	29.75	28.62		2.38	28.06	30.5	4.5	0.75	40	85	290
30	34	1.25	1.25	31.75	30.62		2.5	30.06	32.5	4.5	0.75	44	90	330
32	36	1.32	1.38	33.75	32.62		2.69	32.06	34.5	4.75	0.75	48	105	390
34	38	1.32	1.44	35.75	34.62		2.82	34.06	36.5	4.75	0.75	52	110	430
36	40.69	1.38	1.61	38	36.81		3.32	36.06	39.06	5.25	0.88	40	145	518
38	42.69	1.44	1.69	40	38.81		3.44	38.06	41.06	5.5	0.88	40	160	595
40	44.69	1.44	1.69	42	40.81		3.57	40.06	43.06	5.5	0.88	44	170	760
42	46.69	1.5	1.82	44	42.81		3.69	42.06	45.06	5.5	0.88	48	185	895
44	49.25	1.63	1.88	46.25	44.88		4.07	44.06	47.38	6	1	36	230	1065
46	51.25	1.69	1.94	48.25	46.88		4.19	46.06	49.38	6.25	1	40	245	1185
48	53.25	1.75	2.07	50.25	48.88		4.32	48.06	51.38	6.5	1	44	270	1315
50	55.25	1.82	2.13	52.25	50.94		4.5	50.06	53.38	6.5	1	44	290	1505
52	57.38	1.82	2.19	54.25	52.94		4.69	52.06	55.5	6.75	1	48	310	1665
54	59.38	1.88	2.32	56.25	55		4.88	54.06	57.5	6.75	1	48	340	1840
56	62	1.94	2.38	58.5	57.12		5.25	56.06	59.88	7.25	1.12	40	400	2110
58	64	2	2.44	60.5	59.12		5.38	58.06	61.88	7.25	1.12	44	430	2300
60	66	2.13	2.57	62.5	61.12		5.63	60.06	63.88	7.75	1.12	44	475	2500

Dimensions are in inches. Weights are in pounds.

(1)- Bolt lenghts are calculated based on bolting one WN to one Blind. (2)- Bolt diameter should be 1/8″ less than the bolt hole diameter Note:

ANSI B16.47 Series B Class 75 Flange PDF (for printing).