LARGE DIAMETER FLANGES SERIES B / API 605 ASME B16.47 Class 400

SERIES B FLANGES

Nominal Size NPS		Outside Diameter of Flange	Thickness of Flange		Length thru Hub	Diameter Of Hub At Base	Diameter Of Hub At Point of Welding	Diameter Of Raised Face	Diameter of Bolt Circle	Number of Bolt Holes	Diameter of Bolt Holes	Diameter of Bolts	Fillet Radius Min
			WNF	BLIND
		O	C	C	Y	X	A	R					r1
26	in.	33.5	3.5	3.5	5.88	27.12	26	28	30.75	28	1.5	1 3/8	0.44
	mm	850.9	88.9	88.9	149.4	688.8	660.4	711.2	781.1		38.1	34.9	11.2
28	in.	36	3.75	3.75	6.25	29.12	28	30 00	33	24	1 62	1 ½	0.5
	mm	914.4	95.3	95.3	158.8	739.6	711.2	762 0	838.2		41.1	38.1	12.7
30	in.	38.25	4	4	6.69	31.25	30	32.25	35.25	28	1.62	1 ½	0.5
	mm	971.6	102	101.6	169.9	793.8	762	819.2	895.4		41.1	38.1	12.7
32	in.	40.75	4.25	4.25	7.06	33.25	32	34.38	37.5	28	1.75	1 5/8	0.5
	mm	1035.1	108	108	179.3	844.6	812.8	873.3	952.5		44.5	41.3	12.7
34	in.	42.75	4.38	4.38	7.38	35.38	34	36.5	39.5	32	1.75	1 5/8	0.56
	mm	1085.9	111	111.3	187.5	898.7	863.6	927.1	1003 3		44.5	41.3	14.2
36	in.	45.5	4.69	4.69	7.88	37.5	36	38 62	42	28	1.88	1 ¾	0.56
	mm	1155.7	119	119.1	200.2	952.5	914.4	980 9	1066 8		47.8	44.5	14.2
38	in.
	mm
40	in.
	mm
42	in.
	mm
44	in.
	mm
46	in.
	mm
48	in.		Sizes 38″ thru 60″ are identical to Series A, Class 400 Flanges
	mm
50	in.
	mm
52	in.
	mm
54	in.
	mm
56	in.
	mm
58	in.
	mm
60	in.
	mm

(1) Bore diameter to be specified by the purchaser.

(2) When this flanges are require with flat face, either the full thickness or thickness with raised face removed may be furnished. Users are reminded that removing the raised face will make the length through hob nonstandard.