ASME B16.5 Class 1500 Blind Flange

Technical Drawing

Dimensions of 1500# Blind Flanges

NPS	D	G	K	T
1/2	120	34.9	82.6	22.3
3/4	130	42.9	88.9	25.4
1	150	50.8	101.6	28.6
1-1/4	160	63.5	111.1	28.6
1-1/2	180	73.0	123.8	31.8
2	215	92.1	165.1	38.1
2-1/2	245	104.8	190.5	41.3
3	265	127.0	203.2	47.7
4	310	157.2	241.3	54.0
5	375	185.7	292.1	73.1
6	395	215.9	317.5	82.6
8	485	269.9	393.7	92.1
10	585	323.8	482.6	108.0
12	675	381.0	571.5	123.9
14	750	412.8	635.0	133.4
16	825	469.9	704.8	146.1
18	915	533.4	774.7	162.0
20	985	584.2	831.8	177.8
24	1170	692.2	990.6	203.2

*D: outside diameter of blind flange; K: diameter of bolt circle; G: outside diameter of raised face; T: minimum thickness of 1500LB blind flange; All units are mm.

NPS	n	d	l	L	Mass
1/2	4	7/8	3/4	110	1.77
3/4	4	7/8	3/4	115	2.42
1	4	1	7/8	125	3.57
1-1/4	4	1	7/8	125	4.14
1-1/2	4	1-1/8	1	140	5.75
2	8	1	7/8	145	10.1
2-1/2	8	1-1/8	1	160	14.0
3	8	1-1/4	1-1/8	180	19.1
4	8	1-3/8	1-1/4	195	29.9
5	8	1-5/8	1-1/2	250	58.4
6	12	1-1/2	1-3/8	260	71.8
8	12	1-3/4	1-5/8	290	122
10	12	2	1-7/8	335	210
12	16	2-1/8	2	375	316
14	16	2-3/8	2-1/4	405	420
16	16	2-5/8	2-1/2	445	558
18	16	2-7/8	2-3/4	495	760
20	16	3-1/8	3	540	965
24	16	3-5/8	3-1/2	615	1558

*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 1500, 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.