ASME B16.47 Series A Blind Flange/Blank Flange Dimensions

A blind flange is a solid disk used to block off a pipeline or to create a stop. It is machined in the same manner as a regular flange with the mounting holes around the perimeter and the gasket sealing rings machined into the mating surface. The difference is that a blind flange has no opening to allow fluid to pass through. The blind flange can be inserted between two open flanges and used to block off the flow of liquid through a pipeline.

ASME B16.47 Series A Blind Flange Class 150LBS Dimensions
NPS	D	L	Holes	B	G	Weight
22″	750	35	20	46	641	151.32
26″	870	35	24	68.5	749	305.6
28″	925	35	28	71.5	800	360.27
30″	985	35	28	74.5	857	427.91
32″	1060	41	28	81	914	535.24
34″	1110	41	32	82.5	965	596.91
36″	1170	41	32	90.5	1022	731.11
38″	1240	41	32	87.4	1073	796.28
40″	1290	41	36	90.5	1124	891.39
42″	1345	41	36	97	1194	1042.49
44″	1405	41	40	102	1245	1195.6
46″	1455	41	40	103	1295	1298
48″	1510	41	44	108	1359	1465.44
50″	1570	48	44	111	1410	1613.79
52″	1625	48	44	116	1460	1812.01
54″	1685	48	44	121	1511	2037.98
56″	1745	48	48	124	1575	2238.92
58″	1805	48	48	129	1626	2498.29
60″	1855	48	52	132	1676	2697.85

ASME B16.47 Series A Blind Flange Class 300 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
22″	840	41	24	66.5	641	270.24
26″	970	44	28	84	749	455.99
28″	1035	44	28	90.5	800	563.74
30″	1090	48	28	95	857	654.26
32″	1150	51	28	100	914	766.38
34″	1205	51	28	105	965	888.43
36″	1270	54	32	111	1022	1035.25
38″	1170	41	32	108	1029	873.16
40″	1240	44	32	114	1086	1034.24
42″	1290	44	32	119	1137	1172.41
44″	1355	48	32	124	1194	1343.96
46″	1415	51	28	129	1245	1530.77
48″	1465	51	32	133	1314	1688.32
50″	1530	54	32	140	1359	1936.06
52″	1580	54	32	144	1410	2129.4
54″	1660	60	28	152	1467	2482.95
56″	1710	60	28	154	1518	2675.51
58″	1760	60	32	159	1575	2918.68
60″	1810	60	32	164	1620	3190.76

ASME B16.47 Series A Blind Flange Class 400 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	971.5	47.6	28	93.4	749.3	534
28″	1035	50.8	28	104.8	800.1	645
30″	1092.2	54	28	111.1	857.2	760
32″	1149.4	54	28	115.9	914.4	885
34″	1206.5	54	28	122.2	965.2	1035
36″	1270	54	32	128.6	1022.3	1205
38″	1206.5	47.6	32	123.8	1035.1	1055
40″	1270	50.8	32	130.2	1092.2	1228
42″	1320.8	50.8	32	133.3	1143	1366
44″	1384.3	54	32	139.7	1200.1	1569
46″	1441.5	54	36	146.1	1257.3	1776
48″	1511.3	60.3	28	152.4	1308.1	2043
50″	1568.5	60.3	32	158.8	1362.1	2294
52″	1619.3	60.3	32	163.5	1412.9	2500
54″	1801.8	66.7	28	171.5	1470	2900
56″	1752.6	66.7	32	176.2	1527.2	3174
58″	1803.4	66.7	32	181	1578	3462
60″	1886	73	32	188.9	1635.1	3940

ASME B16.47 Series A Blind Flange Class 600 BS Dimensions
NPS	D	L	Holes	B	G	Weight
22″	870	47	24	95	641	428.36
26″	1015	51	28	125	749	759.8
28″	1075	54	28	132	800	899.09
30″	1130	54	28	140	857	1060.43
32″	1194	60	28	148	914	1241.59
34″	1245	60	28	154	965	1412.45
36″	1315	60	28	162	1022	1667.35
38″	1270	60	28	156	1054	1497.83
40″	1320	60	32	162	1111	1673.55
42″	1405	67	28	171	1168	2002.07
44″	1455	67	32	178	1226	2224.51
46″	1510	67	32	186	1276	2513.74
48″	1595	73	32	195	1283	2917.97
50″	1670	79	28	203	1384	3346.79
52″	1720	79	32	210	1435	3652.37
54″	1780	79	32	217	1492	4058.92
56″	1855	86	32	225	1543	4538.32
58″	1905	86	32	232	1600	4952.53
60″	1995	92	28	243	1657	5715.25

ASME B16.47 Series A Blind Flange Class 900 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	1085.9	73	20	160.3	749.3	1082.04
28″	1168.4	79.4	20	171.5	800.1	1335.21
30″	1231.9	79.4	20	182.5	857.3	1594.45
32″	1314.5	85.7	20	193.7	914.4	1 920.84
34″	1397	92.1	20	204.8	965.2	2286.5
36″	1460.5	92.1	20	214.3	1022.4	2635.06
38″	1460.5	92.1	20	215.9	1098.5	2660.75
40″	1511.3	92.1	24	223.8	1162.1	2923.5
42″	1562.1	92.1	24	231.8	1212.8	3253.96
44″	1647.8	98.4	24	242.9	1270	3781.41
46″	1733.5	104.8	24	255.6	1333.5	4389.76
48″	1784.4	104.8	24	263.5	1384.3	4819.58