ASME B16.47 Series B Flanges Class 400

Technical drawings

Dimensions

NPS	D	K	G	X
26	850	781.0	711	689
28	915	838.2	762	740
30	970	895.4	819	794
32	1035	952.5	873	845
34	1085	1003.3	927	899
36	1155	1066.8	981	952

*D: outside diameter of flange; K: diameter of bolt circle; G: outside diameter of raised face; X: diameter of hub of  WN flange. All dimensions are in mm units.

NPS	A	TBL	TWN	Y
26	660.4	88.9	88.9	149
28	711.2	95.3	95.3	159
30	762.0	101.6	101.6	170
32	812.8	108.0	108.0	179
34	863.6	111.2	111.2	187
36	914.4	119.1	119.1	200

*A: diameter of hub top of WN; T_BL: minimum thickness of blind flange; T_WN: minimum thickness of WN flange; Y: length through hub of WN; t: 7mm height of RF for Class 400 Series B flange. All dimensions are in mm units.

NPS	n	d	l	r
26	28	1-1/2	1-3/8	11
28	24	1-5/8	1-1/2	13
30	28	1-5/8	1-1/2	13
32	28	1-3/4	1-5/8	13
34	32	1-3/4	1-5/8	14
36	28	1-7/8	1-3/4	14

*n: number of bolt holes; d: diameter of bolt hole; l: diameter of bolt; r: minimum fillet radius for WN. d and l are in inch units,while r is in mm unit.

ASME B16.47 Series A Flanges, by Class
150	300	400	600	900	-
ASME B16.47 Series B Flanges, by Class
75	150	300	400	600	900

*Click to view the dimensions for ASME B16.47 Series B welding neck flanges and blind flanges of each pressure rating.