ASME B16.47 Class 400 Series A Welding Neck Flanges Minimum Thickness 3.5-7.31

General notes: Dimensions are in millimeters unless otherwise indicated. For dimensions "B" and "H", see important information on the top right of the image. Blind flanges ASME B16.47 series A flanges (≥ NPS 26) are MSS SP-44 flanges. ASME has incorporated the MSS-SP44...

Product Details

General notes:

Dimensions are in millimeters unless otherwise indicated.

For dimensions "B" and "H", see important information on the top right of the image.

Blind flanges ASME B16.47 series A flanges (≥ NPS 26) are MSS SP-44 flanges.

ASME has incorporated the MSS-SP44 specification into B16.47 Series A and the API 605 Specification into B16.47 series B.

These specifications include only Welding Neck and Blind Flanges.

Dimensions for Classes 400, 600 and 900 NPS 38 and larger for Series B flanges are the same as for the Series A flanges.

The length of the Stud Bolt does not include the height of the chamfers (points).

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ASME B16.47 Class 400 Series A Welding Neck Flanges
Nominal Pipe Size	Outside Diameter (O)	Minimum Thickness (T)	Raised Face Diameter (R)	Length Thru Hub (Y)	Hub Diameter (X)	Minimum Fillet Radius (r)	Top of Hub (A)	Bore (B)	Approximate Weight (lbs)	Bolt Circle (C)	Number of Holes	Diameter of Holes
26	38.25	3.5	29.5	7.62	28.62	0.44	26	Specified by purchaser	650	34.5	28	1.88
28	40.75	3.75	31.5	8.12	30.81	0.5	28	Specified by purchaser	785	37	28	2
30	43	4	33.75	8.62	32.94	0.5	30	Specified by purchaser	905	39.25	28	2.12
32	45.25	4.25	36	9.12	35	0.5	32	Specified by purchaser	1065	41.5	28	2.12
34	47.5	4.38	38	9.5	37.19	0.56	34	Specified by purchaser	1200	43.5	28	2.12
36	50	4.5	40.25	9.88	39.38	0.56	36	Specified by purchaser	1340	46	32	2.12
38	47.5	4.88	40.75	8.12	39.5	0.56	38	Specified by purchaser	935	44	32	1.88
40	50	5.12	43	8.5	41.5	0.56	40	Specified by purchaser	1090	46.25	32	2
42	52	5.25	45	8.81	43.62	0.56	42	Specified by purchaser	1190	48.25	32	2
44	54.5	5.5	47.25	9.18	45.62	0.56	44	Specified by purchaser	1375	50.5	32	2.12
46	56.75	5.75	49.5	9.62	47.75	0.56	46	Specified by purchaser	1525	52.75	36	2.12
48	59.5	6	51.5	10.12	49.88	0.56	48	Specified by purchaser	1790	55.25	28	2.38
50	61.75	6.19	53.62	10.56	52	0.56	50	Specified by purchaser	1950	57.5	32	2.38
52	63.75	6.38	55.62	10.88	54	0.56	52	Specified by purchaser	2125	59.5	32	2.38
54	67	6.69	57.88	11.38	56.12	0.56	54	Specified by purchaser	2565	62.25	28	2.62
56	69	6.88	60.12	11.75	58.25	0.56	56	Specified by purchaser	2710	64.25	32	2.62
58	71	7	62.12	12.06	60.25	0.56	58	Specified by purchaser	3230	66.25	32	2.62
60	74.25	7.31	64.38	12.56	62.38	0.56	60	Specified by purchaser	3820	69	32	2.88

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