ASME B16.5 Class 600 Blind Flange

Technical Drawing

Dimensions of 600# Blind Flanges

NPS	D	G	K	T
1/2	95	34.9	66.7	14.3
3/4	115	42.9	82.6	15.9
1	125	50.8	88.9	17.5
1-1/4	135	63.5	98.4	20.7
1-1/2	155	73.0	114.3	22.3
2	165	92.1	127.0	25.4
2-1/2	190	104.8	149.2	28.6
3	210	127.0	168.3	31.8
3-1/2	230	139.7	184.2	35.0
4	275	157.2	215.9	38.1
5	330	185.7	266.7	44.5
6	355	215.9	292.1	47.7
8	420	269.9	349.2	55.6
10	510	323.8	431.8	63.5
12	560	381.0	489.0	66.7
14	605	412.8	527.0	69.9
16	685	469.9	603.2	76.2
18	745	533.4	654.0	82.6
20	815	584.2	723.9	88.9
22	870	641.4	777.7	95.2
24	940	692.2	838.2	101.6

*D: outside diameter of blind flange; K: diameter of bolt circle; G: outside diameter of raised face; T: minimum thickness of 600LB blind flange; All units are mm.

NPS	n	d	l	L	Mass
1/2	4	5/8	1/2	75	0.76
3/4	4	3/4	5/8	90	1.28
1	4	3/4	5/8	90	1.60
1-1/4	4	3/4	5/8	95	2.23
1-1/2	4	7/8	3/4	110	3.25
2	8	3/4	5/8	110	4.15
2-1/2	8	7/8	3/4	120	6.13
3	8	7/8	3/4	125	8.44
3-1/2	8	1	7/8	140	11.0
4	8	1	7/8	145	17.3
5	8	1-1/8	1	165	29.4
6	12	1-1/8	1	170	36.1
8	12	1-1/4	1-1/8	190	58.9
10	16	1-3/8	1-1/4	215	97.5
12	20	1-3/8	1-1/4	220	124
14	20	1-1/2	1-3/8	235	151
16	20	1-5/8	1-1/2	255	214
18	20	1-3/4	1-5/8	275	272
20	24	1-3/4	1-5/8	285	349
22	24	1-7/8	1-3/4	305	…
24	24	2	1-7/8	330	533

*n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of stud bolt; Mass: approximate weights/masses of the flange; For all blind flanges of class 600, t (height of raused face)=7mm. All units are mm except that d and l are provided in inch and mass in kg.

ASME B16.5 Blind Flanges, Classes
150#	300#	400#	600#
900#	1500#	2500#	-

*Click to view the dimensions and weights of blind flanges of each pressure rating.