ANSI B16.47 Series B Class 900 Flanges

		Thickness							Drilling				Weights
Nom Size	OD	Weld Neck	Blind	OD of RF	Dia at Base	Bore	LTH	Dia Bevel	Bolt Circle	Bolt Length	HoleDia	# of Holes	Weld Neck	Blind
	O	C	C	R	X	B	Y	A		(1)	(2)
26	40.25	5.31	6.06	30	29.25		10.19	26	35.5	17.75	2.62	20	1050	2184
28	43.5	5.81	6.56	32.25	31.38		10.88	28	38.25	19.5	2.88	20	1520	2762
30	46.5	6.12	6.93	34.5	33.5		11.38	30	40.75	20.5	3.12	20	1820	3334
32	48.75	6.31	7.31	36.5	35.75		11.94	32	43	21	3.12	20	2065	3865
34	51.75	6.75	7.68	39	37.88		12.56	34	45.5	22.5	3.38	20	2450	4576
36	53	6.81	7.94	40.5	40		12.81	36	47.25	22.25	3.12	24	2520	4963
38	57.5	7.5	8.5	43.25	42.25		13.88	38	50.75	24.5	3.62	20	3385	6253
40	59.5	7.75	8.81	45.75	44.38		14.31	40	52.75	25	3.62	24	3620	6940
42	61.5	8.12	9.12	47.75	46.31		14.62	42	54.75	25.75	3.62	24	3960	7675
44	64.88	8.44	9.56	50	48.62		15.38	44	57.62	27	3.88	24	4300	8954
46	68.25	8.88	10.06	52.5	50.88		16.18	46	60.5	28.5	4.12	24	4640	10,426
48	70.25	9.19	10.38	54.5	52.88		16.5	48	62.5	29	4.12	24	4980	11,398

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 900 Flange PDF (for printing).