THREADED FLANGES ASME B16.5 Class 150

Nominal Size NPS		Outside Diameter of Flange	Thickness of Flange	Diameter Of Raised Face(1)	Diameter Of Hub At Base (2)	Length thru Hub	Minimum Threaded Lenght	Minimum Counter – Bore	Number of Bolt Holes	Diameter of Bolt Holes	Diameter of Bolts	Diameter of Bolt Circle	Approx. Weight Pounds Kg
Nominal Size NPS		O	C	R	X	Y	T	Q	Number of Bolt Holes	Diameter of Bolt Holes	Diameter of Bolts	Diameter of Bolt Circle	Approx. Weight Pounds Kg
½	in.	3.5	0.44	1.38	1.19	0.62	0.62		4	0.62	½	2.38	1
	mm	88.9	11.2	35.1	30.2	15.7	15.7			15.7	12.7	60.5	0.5
¾	in.	3.88	0.5	1.69	1.5	0.62	0.62		4	0.62	½	2.75	2
	mm	98.6	12.7	42.9	38.1	15.7	15.7			15.7	12.7	69.9	1
1	in.	4.25	0.56	2	1.94	0.69	0.69		4	0.62	½	3.12	2
	mm	108	14.2	50.8	49.3	17.5	17.5			15.7	12.7	79.2	1
1 ¼	in.	4.62	0.62	2.5	2.31	0.81	0.81		4	0.62	½	3.5	3
	mm	117.3	15.7	63.5	58.7	20.6	20.6			15.7	12.7	88.9	1
1 ½	in.	5	0.69	2.88	2.56	0.88	0.88		4	0.62	½	3.88	3
	mm	127	17.5	73.2	65	22.4	22.4			15.7	12.7	98.6	1
2	in.	6	0.75	3.62	3.06	1	1		4	0.75	5/8	4.75	5
	mm	152.4	19.1	91.9	77.7	25.4	25.4			19.1	15.9	120.7	2
2 ½	in.	7	0.88	4.12	3.56	1.12	1.12		4	0.75	5/8	5.5	7
	mm	177.8	22.4	104.6	90.4	28.4	28.4			19.1	15.9	139.7	3
3	in.	7.5	0.94	5	4.25	1.19	1.19		4	0.75	5/8	6	8
		190.5	23.9	127	108	30.2	30.2			19.1	15.9	152.4	4
3 ½	in.	8.5	0.94	5.5	4.81	1.25	1.25		8	0.75	5/8	7	11
	mm	215.9	23.9	139.7	122.2	31.8	31.8			19.1	15.9	177.8	5
4	in.	9	0.94	6.19	5.31	1.31	1.31		8	0.75	5/8	7.5	13
	mm	228.6	23.9	157.2	134.9	33.3	33.3			19.1	15.9	190.5	6
5	in.	10	0.94	7.31	6.44	1.44	1.44		8	0.88	¾	8.5	15
	mm	254	23.9	185.7	163.6	36.6	36.6			22.4	19.1	215.9	7
6	in.	11	1	8.5	7.56	1.56	1.56		8	0.88	¾	9.5	19
	mm	279.4	25.4	215.9	192	39.6	39.6			22.4	19.1	241.3	9
8	in.	13.5	1.12	10.62	9.69	1.75	1.75		8	0.88	¾	11.75	30
	mm	342.9	28.4	269.7	246.1	44.5	44.5			22.4	19.1	298.5	14
10	in.	16	1.19	12.75	12	1.94	1.94		12	1	7/8	14.25	43
	mm	406.4	30.2	323.9	304.8	49.3	49.3			25.4	22.2	362	20
12	in.	19	1.25	15	14.38	2.19	2.19		12	1	7/8	17	64
	mm	482.6	31.8	381	365.3	55.6	55.6			25.4	22.2	431.8	29
14	in.	21	1.38	16.25	15.75	2.25	2.25		12	1.12	1	18.75	90
	mm	533.4	35.1	412.8	400.1	57.2	57.2			28.4	25.4	476.3	41
16	in.	23.5	1.44	18.5	18	2.5	2.5		16	1.12	1	21.25	98
	mm	596.9	36.6	469.9	457.2	63.5	63.5			28.4	25.4	539.8	44
18	in.	25	1.56	21	19.88	2.69	2.69		16	1.25	1 1/8	22.75	130
	mm	635	39.6	533.4	505	68.3	68.3			31.8	28.6	577.9	59
20	in.	27.5	1.69	23	22	2.88	2.88		20	1.25	1 1/8	25	165
	mm	698.5	42.9	584.2	558.8	73.2	73.2			31.8	28.6	635	75
24	in.	32	1.88	27.25	26.12	3.25	3.25		20	1.38	1 ¼	29.5	220
	mm	812.8	47.8	692.2	663.4	82.6	82.6			35.1	31.8	749.3	100