ASME B16.47 Series B Flanges Class 900

Technical drawings

Dimensions

NPS	D	K	G	X
26	1020	901.7	762	743
28	1105	971.6	819	797
30	1180	1035.0	876	851
32	1240	1092.2	927	908
34	1315	1155.7	991	962
36	1345	1200.2	1029	1016

*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	154.0	135.0	259
28	711.2	166.7	147.7	276
30	762.0	176.1	155.6	289
32	812.8	186.0	160.4	303
34	863.6	195.0	171.5	319
36	914.4	201.7	173.1	325

*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 900 Series B flange. All dimensions are in mm units.

NPS	n	d	l	r
26	20	2-5/8	2-1/2	11
28	20	2-7/8	2-3/4	13
30	20	3-1/8	3	13
32	20	3-1/8	3	13
34	20	3-3/8	3-1/4	14
36	24	3-1/8	3	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.