Series A Flanges Dimensions

ASME B16.47 Series A Class 150 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	676	660.4	870	66.7 68.3	66.7 68.3	119 120.6
28	727	711.2	925	69.9 71.5	69.9 71.5	124 125.6
30	781	762	985	73.1 74.7	73.1 74.7	135 136.6
32	832	812.8	1060	79.4 81	79.4 81	143 144.6
34	883	863.6	1110	81 82.6	81 82.6	148 149.6
36	933	914.4	1170	88.9 90.5	88.9 90.5	156 157.6
38	991	965.2	1240	85.8 87.4	85.8 87.4	156 157.6
40	1041	1016	1290	88.9 90.5	88.9 90.5	162 163.6
42	1092	1066.8	1345	95.3 96.9	95.3 96.9	170 171.6
44	1143	1117.6	1405	100.1 101.7	100.1 101.7	176 177.6
46	1197	1168.4	1455	101.6 103.2	101.6 103.2	184 185.6
48	1248	1219.2	1510	106.4 108	106.4 108	191 192.6
50	1302	1270	1570	109.6 111.2	109.6 111.2	202 203.6
52	1353	1320.8	1625	114.3 115.9	114.3 115.9	208 209.6
54	1403	1371.6	1685	119.1 120.7	119.1 120.7	214 215.6
56	1457	1422.4	1745	122.3 123.9	122.3 123.9	227 228.6
58	1508	1473.2	1805	127 128.6	127 128.6	233 234.6
60	1559	1524	1855	130.2 131.8	130.2 131.8	238 239.6

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	24	749	806.4	34.9	1.1/4	222
28	28	800	863.6	34.9	1.1/4	228
30	28	857	914.4	34.9	1.1/4	234
32	28	914	977.9	41.3	1.1/2	266
34	32	965	1028.7	41.3	1.1/2	266
36	32	1022	1085.8	41.3	1.1/2	279
38	32	1073	1149.4	41.3	1.1/2	279
40	36	1124	1200.2	41.3	1.1/2	279
42	36	1194	1257.3	41.3	1.1/2	292
44	40	1245	1314.4	41.3	1.1/2	304
46	40	1295	1365.2	41.3	1.1/2	304
48	44	1359	1422.4	41.3	1.1/2	317
50	44	1410	1479.6	47.6	1.3/4	336
52	44	1461	1536.7	47.6	1.3/4	349
54	44	1511	1593.8	47.6	1.3/4	355
56	48	1575	1651	47.6	1.3/4	361
58	48	1626	1708.2	47.6	1.3/4	374
60	52	1676	1759	47.6	1.3/4	381

ASME B16.47 Series A Class 300 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	721	660.4	970	77.8 79.4	82.6 84.2	183 184.6
28	775	711.2	1035	84.2 85.8	88.9 90.5	195 196.6
30	827	762	1090	90.5 92.1	93.7 95.3	208 209.6
32	881	812.8	1150	96.9 98.5	98.5 100.1	221 222.6
34	937	863.6	1205	100.1 101.7	103.2 104.8	230 231.6
36	991	914.4	1270	103.2 104.8	109.6 111.2	240 241.6
38	994	965.2	1170	106.4 108	106.4 108	179 180.6
40	1048	1016	1240	112.8 114.4	112.8 114.4	192 193.6
42	1099	1066.8	1290	117.5 119.1	117.5 119.1	198 199.6
44	1149	1117.6	1355	122.3 123.9	122.3 123.9	205 206.6
46	1203	1168.4	1415	127 128.6	127 128.6	214 215.6
48	1254	1219.2	1465	131.8 133.4	131.8 133.4	222 223.6
50	1305	1270.2	1530	138.2 139.8	138.2 139.8	230 231.6
52	1356	1320.8	1580	142.9 144.5	142.9 144.5	237 238.6
54	1410	1371.6	1660	150.9 152.5	150.9 152.5	251 252.6
56	1464	1422.4	1710	152.4 154	152.4 154	259 260.6
58	1514	1473.2	1760	157.2 158.8	157.2 158.8	265 266.6
60	1564	1524	1810	162 163.6	162 163.6	271 272.6

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	28	749	876.3	44.5	1.5/8	273
28	28	800	939.8	44.5	1.5/8	285
30	28	857	997	47.6	1.3/4	304
32	28	914	1054.1	50.8	1.7/8	317
34	28	965	1104.9	50.8	1.7/8	330
36	32	1022	1168.4	54	2	342
38	32	1029	1092.2	41.3	1.1/2	317
40	32	1086	1155.7	44.5	1.5/8	336
42	32	1137	1206.5	44.5	1.5/8	349
44	32	1194	1263.6	47.6	1.3/4	361
46	28	1245	1320.8	50.8	1.7/8	381
48	32	1302	1371.6	50.8	1.7/8	387
50	32	1359	1428.8	54	2	406
52	32	1410	1479.6	54	2	419
54	28	1467	1549.4	60.3	2.1/4	444
56	28	1518	1600.2	60.3	2.1/4	450
58	32	1575	1651	60.3	2.1/4	457
60	32	1626	1701.8	60.3	2.1/4	469

ASME B16.47 Series A Class 400 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	727	660.4	970	88.9 95.25	98.5 104.85	194 200.35
28	783	711.2	1035	95.3 101.65	104.8 111.15	206 212.35
30	837	762	1090	101.6 107.95	111.2 117.55	219 225.35
32	889	812.8	1150	108 114.35	115.9 122.25	232 238.35
34	945	863.6	1205	111.2 117.55	122.3 128.65	241 247.35
36	1000	914.4	1270	114.3 120.65	128.6 134.95	251 257.35
38	1003	965.2	1205	123.9 130.25	123.9 130.25	206 212.35
40	1054	1016	1270	130.2 136.55	130.2 136.55	216 222.35
42	1108	1066.8	1320	133.4 139.75	133.4 139.75	224 230.35
44	1159	1117.6	1385	139.7 146.05	139.7 146.05	233 239.35
46	1213	1168.4	1440	146.1 152.45	146.1 152.45	244 250.35
48	1267	1219.2	1510	152.4 158.75	152.4 158.75	257 263.35
50	1321	1270.2	1570	157.2 163.55	158.8 165.15	268 274.35
52	1372	1320.8	1620	162 168.35	163.6 169.95	276 282.35
54	1426	1371.6	1700	169.9 176.25	171.5 177.85	289 295.35
56	1480	1422.4	1755	174.7 181.05	176.3 182.65	298 304.35
58	1530	1473.2	1805	177.8 184.15	181 187.35	306 312.35
60	1584	1524	1885	185.8 192.15	189 195.35	319 325.35

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	28	749	876.3	47.6	1.3/4	317
28	28	800	939.8	50.8	1.7/8	336
30	28	857	997	54	2	355
32	28	914	1054.1	54	2	361
34	28	965	1104.9	54	2	374
36	32	1022	1168.4	54	2	381
38	32	1035	1117.6	47.6	1.3/4	374
40	32	1092	1174.8	50.8	1.7/8	393
42	32	1143	1225.6	50.8	1.7/8	400
44	32	1200	1282.7	54	2	419
46	36	1257	1339.8	54	2	431
48	28	1308	1403.4	60.3	2.1/4	457
50	32	1362	1460.5	60.3	2.1/4	469
52	32	1413	1511.3	60.3	2.1/4	476
54	28	1470	1581.2	66.7	2.1/2	508
56	32	1527	1632	66.7	2.1/2	514
58	32	1578	1682.8	66.7	2.1/2	520
60	32	1635	1752.6	73	2.3/4	552

ASME B16.47 Series A Class 600 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	748	660.4	1015	108 114.35	125.5 131.85	222 228.35
28	803	711.2	1075	111.2 117.55	131.8 138.15	235 241.35
30	862	762	1130	114.3 120.65	139.7 146.05	248 254.35
32	918	812.8	1195	117.5 123.85	147.7 154.05	260 266.35
34	973	863.6	1245	120.7 127.05	154 160.35	270 276.35
36	1032	914.4	1315	123.9 130.25	162 168.35	283 289.35
38	1022	965.2	1270	152.4 158.75	155 161.35	254 260.35
40	1073	1016	1320	158.8 165.15	162 168.35	264 270.35
42	1127	1066.8	1405	168.3 174.65	171.5 177.85	279 285.35
44	1181	1117.6	1455	173.1 179.45	177.8 184.15	289 295.35
46	1235	1168.4	1510	179.4 185.75	185.8 192.15	300 306.35
48	1289	1219.2	1595	189 195.35	195.3 201.65	316 322.35
50	1343	1270.2	1670	196.9 203.25	203.2 209.55	329 335.35
52	1394	1320.8	1720	203.2 209.55	209.6 215.95	337 343.35
54	1448	1371.6	1780	209.6 215.95	217.5 223.85	349 355.35
56	1502	1422.4	1855	217.4 223.75	225.5 231.85	362 368.35
58	1553	1473.2	1905	222.3 228.65	231.8 238.15	370 376.35
60	1610	1524	1995	233.4 239.75	242.9 249.25	389 395.35

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	28	749	914.4	50.8	1.7/8	368
28	28	800	965.2	54	2	381
30	28	857	1022.4	54	2	393
32	28	914	1079.5	60.3	2.1/4	419
34	28	965	1130.3	60.3	2.1/4	425
36	28	1022	1193.8	66.7	2.1/2	450
38	28	1054	1162	60.3	2.1/4	463
40	32	1111	1212.8	60.3	2.1/4	476
42	28	1168	1282.7	66.7	2.1/2	501
44	32	1226	1333.5	66.7	2.1/2	514
46	32	1276	1390.6	66.7	2.1/2	527
48	32	1334	1460.5	73	2.3/4	565
50	28	1384	1524	79.4	3	590
52	32	1435	1574.8	79.4	3	603
54	32	1492	1632	79.4	3	615
56	32	1543	1695.4	85.7	3.1/4	647
58	32	1600	1746.2	85.7	3.1/4	660
60	28	1657	1822.4	92.1	3.1/2	692

ASME B16.47 Series A Class 900 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	775	660.4	1085	139.7 146.05	160.4 166.75	286 292.35
28	832	711.2	1170	142.9 149.25	171.5 177.85	298 304.35
30	889	762	1230	149.3 155.65	182.6 188.95	311 317.35
32	946	812.8	1315	158.8 165.15	193.7 200.05	330 336.35
34	1006	863.6	1395	165.1 171.45	204.8 211.15	349 355.35
36	1064	914.4	1460	171.5 177.85	214.4 220.75	362 368.35
38	1073	965.2	1460	190.5 196.85	215.9 222.25	352 358.35
40	1127	1016	1510	196.9 203.25	223.9 230.25	364 370.35
42	1176	1066.8	1560	206.4 212.75	231.8 238.15	371 377.35
44	1235	1117.6	1650	214.4 220.75	242.9 249.25	391 397.35
46	1292	1168.4	1735	225.6 231.95	255.6 261.95	411 417.35
48	1343	1219.2	1785	233.4 239.75	263.6 269.95	419 425.35

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	20	749	952.5	73	2.3/4	476
28	20	800	1022.4	79.4	3	501
30	20	857	1085.8	79.4	3	520
32	20	914	1155.7	85.7	3.1/4	558
34	20	965	1225.6	92.1	3.1/2	584
36	20	1022	1289	92.1	3.1/2	603
38	20	1099	1289	92.1	3.1/2	622
40	24	1162	1339.8	92.1	3.1/2	635
42	24	1213	1390.6	92.1	3.1/2	654
44	24	1270	1463.7	98.4	3.3/4	685
46	24	1334	1536.7	104.8	4	723
48	24	1384	1587.5	104.8	4	736

A = Diameter at Base of Hub
G = Outside Diameter of Raised Face
K = Bolt Circle Diameter
L = Diameter of Bolt Holes
OD = Diameter at Weld Bevel
D = Overall Diameter of Flange
B (WNF) = Minimum Thickness of Welding Neck Flange
B (BLF) = Minimum Thickness of Blind Flange
H = Length thru Hub

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