ASME B16.5 Class 2500 Blind Flange

Technical Drawing

Dimensions of 2500# Blind Flanges

NPS	D	G	K	T
1/2	135	34.9	88.9	30.2
3/4	140	42.9	95.2	31.8
1	160	50.8	108.0	35.0
1-1/4	185	63.5	130.2	38.1
1-1/2	205	73.0	146.0	44.5
2	235	92.1	171.4	50.9
2-1/2	265	104.8	196.8	57.2
3	305	127.0	228.6	66.7
4	355	157.2	273.0	76.2
5	420	185.7	323.8	92.1
6	485	215.9	368.3	108.0
8	550	269.9	438.2	127.0
10	675	323.8	539.8	165.1
12	760	381.0	619.1	184.2

*D: outside diameter of blind flange; K: diameter of bolt circle; G: outside diameter of raised face; T: minimum thickness of 2500LB blind flange; All units are mm.

NPS	n	d	l	L	Mass
1/2	4	7/8	3/4	120	2.99
3/4	4	7/8	3/4	125	3.50
1	4	1	7/8	140	4.96
1-1/4	4	1-1/8	1	150	7.35
1-1/2	4	1-1/4	1-1/8	170	10.4
2	8	1-1/8	1	180	15.6
2-1/2	8	1-1/4	1-1/8	195	22.6
3	8	1-3/8	1-1/4	220	34.8
4	8	1-5/8	1-1/2	255	53.9
5	8	1-7/8	1-3/4	300	90.8
6	8	2-1/8	2	345	141
8	12	2-1/8	2	380	214
10	12	2-5/8	2-1/2	490	411
12	12	2-7/8	2-3/4	540	592

*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 2500, 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.