ASME B16.5 Class 900 Threaded Flange

Technical Drawing

Dimensions of 900# Threaded Flanges

NPS	D	G	X	K
1/2	120	34.9	38	82.6
3/4	130	42.9	44	88.9
1	150	50.8	52	101.6
1-1/4	160	63.5	64	111.1
1-1/2	180	73.0	70	123.8
2	215	92.1	105	165.1
2-1/2	245	104.8	124	190.5
3	240	127.0	127	190.5
4	290	157.2	159	235.0
5	350	185.7	190	279.4
6	380	215.9	235	317.5
8	470	269.9	298	393.7
10	545	323.8	368	469.9
12	610	381.0	419	533.4
14	640	412.8	451	558.8
16	705	469.9	508	616.0
18	785	533.4	565	685.8
20	855	584.2	622	749.3
24	1040	692.2	749	901.7

*D: outside diameter of flange; K: diameter of bolt circle; G: outside diameter of raised face; X: diameter of hub at base; For all  threaded flanges of class 900, t (height of raused face)=7mm. All units are mm.

NPS	h	Q	Y	T
1/2	23	23.6	32	22.3
3/4	26	29.0	35	25.4
1	29	35.8	41	28.6
1-1/4	31	44.4	41	28.6
1-1/2	32	50.6	44	31.8
2	39	63.5	57	38.1
2-1/2	48	76.2	64	41.3
3	42	92.2	54	38.1
4	48	117.6	70	44.5
5	54	144.4	79	50.8
6	58	171.4	86	55.6
8	64	222.2	102	63.5
10	72	276.2	108	69.9
12	77	328.6	117	79.4
14	83	360.4	130	85.8
16	86	411.2	133	88.9
18	89	462.0	152	101.6
20	93	512.8	159	108.0
24	102	614.4	203	139.7

*h: minimum thread length; Q:minimum diameter of counterbore; Y: length through hub;  T: minimum thickness of flange; All units are mm.

NPS	n	d	l	L	Mass
1/2	4	7/8	3/4	110	1.74
3/4	4	7/8	3/4	115	2.34
1	4	1	7/8	125	3.44
1-1/4	4	1	7/8	125	3.91
1-1/2	4	1-1/8	1	140	5.36
2	8	1	7/8	145	9.85
2-1/2	8	1-1/8	1	160	13.7
3	8	1	7/8	145	11.6
4	8	1-1/4	1-1/8	170	19.7
5	8	1-3/8	1-1/4	190	31.9
6	12	1-1/4	1-1/8	190	41.1
8	12	1-1/2	1-3/8	220	70.7
10	16	1-1/2	1-3/8	235	101
12	20	1-1/2	1-3/8	255	133
14	20	1-5/8	1-1/2	275	153
16	20	1-3/4	1-5/8	285	185
18	20	2	1-7/8	325	258
20	20	2-1/8	2	350	317
24	20	2-5/8	2-1/2	440	606

*n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of stud bolts for 7 mm raised face; Mass: approximate weights/masses of the flange; All units are mm except that d and l are provided in inch, the weights are in kg.

ASME B16.5 Threaded Flange, Classes
150#	300#	400#	600#
900#	1500#	2500#	-

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