ASME B16.48 Class 150

Pipe flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.

A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar.

NPS	Inside Diameter, B	Outside Diameter, O	Centerline Dimension, A	Thick-ness, t	Web Width, W		Approximate Weight kgs
1/2	16	45	60	3.0	38	2	0.22
3/4	21	54	70	3.0	38	2	0.29
1	27	64	80	3.0	38	2	0.38
1 1/4	42	73	90	6.4	38	2	0.64
1 1/2	48	83	100	6.4	38	2	0.80
2	61	102	120	6.4	51	2	1.20
2 1/2	73	107	140	6.4	51	2	1.47
3	89	133	150	6.4	64	2	1.88
3 1/2	102	159	175	9.7	64	2	3.50
4	114	172	190	9.7	64	2	4.03
5	141	194	215	9.7	76	2	4.89
6	168	219	240	12.7	76	2	7.18
8	219	276	300	12.7	76	2	11.03
10	273	337	360	15.7	102	2	18.88
12	324	406	430	19.1	102	2	32.39
14	356	448	475	19.1	108	2	39.63
16	406	511	460	22.4	108	2	59.95
18	457	546	580	22.4	114	2	63.91
20	508	603	635	28.4	121	2	94.55
24	610	714	750	31.8	140	2	144.14