SERIES A

ASME B16.47 Class 900 Series A Welding Neck Flanges

SPECIFICATIONS

▪ All dimensions are in inches

▪ 1/4" raised face will be added to the thickness and
  overall length unless otherwise specified

▪ Flat face option available

Nominal Pipe Size	Outside Diameter	Minimum Thickness	Raised Face Diameter	Length Thru Hub	Hub Diameter	Minimum Fillet Radius	Top of Hub	Bore	Approximate Weight	Bolt Circle	Number of Holes	Diameter of Holes
	(O)	(T)	(R)	(Y)	(X)	(r)	(A)	(B)	(lbs)	(C)
26	42.75	5.50	29.50	11.25	30.50	0.44	26	Specified by purchaser	1525	37.50	20	2.88
28	46.00	5.62	31.50	11.75	32.75	0.50	28	Specified by purchaser	1810	40.25	20	3.12
30	48.50	5.88	33.75	12.25	35.00	0.50	30	Specified by purchaser	2120	42.75	20	3.12
32	51.75	6.25	36.00	13.00	37.25	0.50	32	Specified by purchaser	2545	45.50	20	3.38
34	55.00	6.50	38.00	13.75	39.62	0.56	34	Specified by purchaser	2970	48.25	20	3.62
36	57.50	6.75	40.25	14.25	41.88	0.56	36	Specified by purchaser	3395	50.75	20	3.62
38	57.50	7.50	43.25	13.88	42.25	0.75	38	Specified by purchaser	3385	50.75	20	3.62
40	59.50	7.75	45.75	14.31	44.38	0.81	40	Specified by purchaser	3620	52.75	24	3.62
42	61.50	8.12	47.75	14.62	46.31	0.81	42	Specified by purchaser	3960	54.75	24	3.62
44	64.88	8.44	50.00	15.38	48.62	0.88	44	Specified by purchaser	4300	57.62	24	3.88
46	68.25	8.88	52.50	16.18	50.88	0.88	46	Specified by purchaser	4640	60.50	24	4.12
48	70.25	9.19	54.50	16.50	52.88	0.94	48	Specified by purchaser	4980	62.50	24	4.12

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