ASME B16.5 Class 150 Threaded Flange

Technical Drawing

Dimensions of 150# Threaded Flanges

NPS	D	G	X	K
1/2	90	34.9	30	60.3
3/4	100	42.9	38	69.9
1	110	50.8	49	79.4
1-1/4	115	63.5	59	88.9
1-1/2	125	73.0	65	98.4
2	150	92.1	78	120.7
2-1/2	180	104.8	90	139.7
3	190	127.0	108	152.4
3-1/2	215	139.7	122	177.8
4	230	157.2	135	190.5
5	255	185.7	164	215.9
6	280	215.9	192	241.3
8	345	269.9	246	298.5
10	405	323.8	305	362.0
12	485	381.0	365	431.8
14	535	412.8	400	476.3
16	595	469.9	457	539.8
18	635	533.4	505	577.9
20	700	584.2	559	635.0
22	750	641.4	610	692.2
24	815	692.2	663	749.3

*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 150, t (height of raused face)=2mm. All units are mm.

NPS	n	d	l	L
1/2	4	5/8	1/2	55
3/4	4	5/8	1/2	65
1	4	5/8	1/2	65
1-1/4	4	5/8	1/2	70
1-1/2	4	5/8	1/2	70
2	4	3/4	5/8	85
2-1/2	4	3/4	5/8	90
3	4	3/4	5/8	90
3-1/2	8	3/4	5/8	90
4	8	3/4	5/8	90
5	8	7/8	3/4	95
6	8	7/8	3/4	100
8	8	7/8	3/4	110
10	12	1	7/8	115
12	12	1	7/8	120
14	12	1-1/8	1	135
16	16	1-1/8	1	135
18	16	1-1/4	1-1/8	145
20	20	1-1/4	1-1/8	160
22	20	1-3/8	1-1/4	170
24	20	1-3/8	1-1/4	170

*n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of stud bolts for 2 mm raised face; All units are mm except that d and l are provided in inch.

NPS	h	Y	T	Mass
1/2	16	14	9.6	0.39
3/4	16	14	11.2	0.56
1	17	16	12.7	0.78
1-1/4	21	19	14.3	1.03
1-1/2	22	21	15.9	1.32
2	25	24	17.5	2.06
2-1/2	29	27	20.7	3.28
3	30	29	22.3	3.85
3-1/2	32	30	22.3	4.81
4	33	32	22.3	5.30
5	36	35	22.3	6.07
6	40	38	23.9	7.45
8	44	43	27.0	12.1
10	49	48	28.6	16.5
12	56	54	30.2	26.2
14	57	56	33.4	34.6
16	64	62	35.0	44.8
18	68	67	38.1	48.9
20	73	71	41.3	61.9
22	…	78	44.5	…
24	83	81	46.1	86.9

* h: minimum thread length; Y: length through hub;  T: minimum thickness of flange ; Mass: approximate weights/masses of the flange; All units are in mm and 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.