API 605/ASME B16.47 Series B Steel Flanges NPS 26 Through NPS 60

API 605/ASME B16.47 Series B Welding Neck Flanges Dimensions

API 605/ASME B16.47 Series B Welding Neck Flanges Class 75 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	762	635	19.1	36	33.3	58.7	676.1	661.9	704.9	39.98
28″	813	685.8	19.1	40	33.3	62	726.9	712.7	755.7	43.86
30″	864	736.6	19.1	44	33.3	65	777.7	763.5	806.5	47.8
32″	941	787.4	19.1	48	35.1	69.9	828.5	814.3	857.3	64.09
34″	965	838.2	19.1	52	35.1	73.2	879.3	865.1	908.1	58.17
36″	1034	889	22.4	40	36.6	85.9	935	915.9	965.2	77.33
38″	1084	939.8	22.4	40	38.1	88.9	985.8	966.7	1016	84.5
40″	1135	990.6	22.4	44	38.1	91.9	1036.6	1017.5	1066.8	90.04
42″	1186	1041.4	22.4	48	39.6	95.3	1087.4	1068.3	1117.6	97.97
44″	1251	1092.2	25.4	36	42.9	104.6	1140	1119.1	1174.8	122.25
46″	1302	1143	25.4	40	44.5	108	1190.8	1169.9	1225.6	131.9
48″	1353	1193.8	25.4	44	46	111.3	1241.6	1220.7	1276.4	141.7
50″	1403	1244.6	25.4	44	47.8	115.8	1293.9	1271.5	1327.2	153.84
52″	1457	1295.4	25.4	48	47.8	120.7	1344.7	1322.3	1378	165.07
54″	1508	1346.2	25.4	48	49.3	125.5	1397	1373.1	1428.8	178.82
56″	1575	1397	28.4	40	50.8	134.9	1450.8	1423.9	1485.9	212.51
58″	1626	1447.8	28.4	44	52.3	138.2	1501.6	1474.7	1536.7	225.48
60″	1676	1498.6	28.4	44	55.6	144.5	1552.4	1525.5	1587.5	245.57

API 605/ASME B16.47 Series B Welding Neck Flanges Class 125 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	870	640.96	35	24	50.8	127	723.9	660		131.11
28″	927	691.96	35	28	52.4	128.6	781.1	711		148.39
30″	984	742.96	35	28	54	130	831.9	762		166.12
32″	1061	793.96	41	28	57.2	133.4	889	813		202.17
34″	1111	844.96	41	32	58.7	134.9	939.8	864		215.59
36″	1169	894.96	41	32	60.3	136.5	997	914		242.91
38″	1238	945.96	41	32	60.3	136.5	1060.5	965		278.58
40″	1289	996.96	41	36	63.5	139.7	1111.3	1016		302.23
42″	1346	1047.96	41	36	66.7	142.9	1168.4	1067		339.48
44″	1404	1098.96	41	40	66.7	142.9	1219.2	1118		360.51
46″	1454	1148.96	41	40	68.3	144.5	1270	1168		383.96
48″	1511	1199.96	41	44	69.9	146.1	1327.2	1219		416.49
50″	1569	1250.96	48	44	69.9	146.1	1378	1270		431.18
52″	1626	1301.96	48	44	73	149.2	1435.1	1321		477.19
54″	1683	1352.96	48	44	76.2	152.4	1492.3	1372		526.73
60″	1854	1504.96	48	52	79.4	155.6	1657.4	1524		639.98
66″	2032	1656.96	48	52	85.7	161.9	1816.1	1676		810.14
72″	2197	1809.96	48	60	88.9	165.1	1993.9	1829		951.69
84″	2534	2114.96	54	64	98.4	174.6	2298.7	2134		1274.95
96″	2877	2418.96	61	68	108	184.2	2609.9	2438		1690.54

API 605/ASME B16.47 Series B Welding Neck Flanges Class 150 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	786	635	22.4	36	41.1	88.9	684.3	661.9	711.2	63.56
28″	837	685.8	22.4	40	44.5	95.3	735.1	712.7	762	73.5
30″	887	736.6	22.4	44	44.5	100.1	787.4	763.5	812.8	80.05
32″	941	787.4	22.4	48	46	108	839.7	814.3	863.6	91.76
34″	1005	838.2	25.4	40	49.3	110.2	892	865.1	920.8	110.27
36″	1057	889	25.4	44	52.3	117.3	944.6	915.9	971.6	124.91
38″	1124	939.8	28.4	40	53.8	124	997	968.2	1022.4	149.17
40″	1175	990.6	28.4	44	55.6	128.5	1049.3	1019	1079.5	162.58
42″	1226	1041.4	28.4	48	58.7	133.4	1101.9	1069.8	1130.3	179.18
44″	1276	1092.2	31.8	52	60.5	136.7	1152.7	1120.6	1181.1	187.51
46″	1341	1143	31.8	40	62	144.5	1205	1171.4	1234.9	223.84
48″	1392	1193.8	31.8	44	65	149.4	1257.3	1222.2	1289.1	243.46
50″	1443	1244.6	31.8	48	68.3	153.9	1308.1	1273	1339.9	263.22
52″	1494	1295.4	31.8	52	69.9	157.2	1360.4	1323.8	1390.7	279.95
54″	1549	1346.2	31.8	56	71.4	162.1	1412.7	1374.6	1441.5	303.62
56″	1600	1397	31.8	60	73.2	166.6	1465.3	1425.4	1492.3	323.64
58″	1675	1447.8	35.1	48	74.7	174.8	1516.1	1476.2	1543.1	383.77
60″	1726	1498.6	35.1	52	76.2	179.3	1570	1527	1600.2	407.55

API 605/ASME B16.47 Series B Welding Neck Flanges Class 300 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	867	635	35.1	32	88.9	144.5	701.5	665.2	736.6	189.56
28″	921	685.8	35.1	36	88.9	149.4	755.7	716	787.4	207.56
30″	991	736.6	38.1	36	93.7	158	812.8	768.4	844.6	254.27
32″	1054	787.4	41.1	32	103.1	168.1	863.6	819.2	901.7	310.53
34″	1108	838.2	41.1	36	103.1	173	917.4	870	952.5	333.98
36″	1172	889	44.5	32	103.1	180.8	965.2	920.8	1009.7	374.99
38″	1222	939.8	44.5	36	111.3	192	1016	971.6	1060.5	51.95
40″	1273	990.6	44.5	40	115.8	198.4	1066.8	1022.4	1114.6	55.97
42″	1334	1041.4	47.8	36	119.1	204.7	1117.6	1074.7	1168.4	508.46
44″	1384	1092.2	47.8	40	127	214.4	1173.2	1125.5	1219.2	69.03
46″	1461	1143	50.8	36	128.5	222.3	1128.9	1176.3	1270	12.74
48″	1511	1193.8	50.8	40	128.5	223.8	1277.9	1227.1	1327.2	678.19
50″	1562	1244.6	50.8	44	138.2	235	1330.5	1277.9	1378	90.66
52″	1613	1295.4	50.8	48	142.7	242.8	1382.8	1328.7	1428.8	98.74
54″	1673	1346.2	50.8	48	136.7	239.8	1435.1	1379.5	1479.6	829.33
56″	1765	1397	60.5	36	153.9	268.2	1493.8	1422.4	1536.7	122.93
58″	1827	1447.8	60.5	40	153.9	274.6	1547.9	1481.1	1593.9	147.04
60″	1878	1498.6	60.5	40	150.9	271.5	1598.7	1531.9	1651	1201.14

API 605/ASME B16.47 Series B Welding Neck Flanges Class 400 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	850.9	635	38.1	28	88.9	149.35	688.85	660.4	711.2	165.95
28″	914.4	685.8	41.15	24	95.25	158.9	739.65	711.2	762	204.49
30″	971.55	736.6	41.15	28	101.6	169.93	793.75	762	819.15	239.2
32″	1035.1	787.4	44.45	28	107.95	179.32	844.55	812.8	873.25	283.06
34″	1085.9	838.2	44.45	32	111.25	187.45	898.65	863	927.1	307.92
36″	1155.7	889	47.75	28	119.13	200.15	952.5	914.4	980.95	381.98

API 605/ASME B16.47 Series B Welding Neck Flanges Class 600 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	889	635	44.45	28	111.25	180.85	698.5	660.4	726.95	244.55
28″	952.5	685.8	47.75	28	115.82	190.5	752.35	711.2	784.35	287.49
30″	1022.4	736.6	50.8	28	125.48	204.72	806.45	762	841.25	358.02
32″	1085.9	787.4	53.85	28	130.05	215.9	860.55	812.8	895.35	414.01
34″	1162.1	838.2	60.45	24	141.22	233.43	914.4	863.6	952.5	523.71
36″	1212.9	889	60.45	28	146.05	242.82	968.25	914.4	1009.7	564.36

API 60 5/ASME B16.47 Series B Welding Neck Flanges Class 900 LBS Dimensions
NPS	A	B	I	Holes	C	D	F	E	G	Weight
26″	1022.4	635	66.55	20	134.87	258.83	742.95	660.4	762	513.64
28″	1104.9	685.8	73.15	20	147.57	276.35	797.05	711.2	819.15	646.22
30″	1181.1	736.6	79.25	20	155.45	289.05	850.9	762	876.3	765.72
32″	1238.3	787.4	79.25	20	160.27	303.28	908.05	812.8	927.1	863.06
34″	1314.5	838.2	85.85	20	171.45	319.02	962.15	863.6	990.6	1023.53
36″	1346.2	889	79.25	24	172.97	325.37	1016	914.4	1028.7	1038.21

API 605 / ASME B16.47 Series B Blind Flange Blind Flange

ASME B16.47 Series B Blind Flange Class 75 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	762	19.1	36	33.27	704.9	116.41
28″	813	19.1	40	33.27	755.7	132.59
30″	864	19.1	44	33.27	806.5	149.83
32″	941	19.1	48	36.58	857.3	195.75
34″	965	19.1	52	38.1	908.1	214.29
36″	1034	22.4	40	42.42	965.2	274.37
38″	1084	22.4	40	44.45	1016	316.52
40″	1135	22.4	44	44.45	1066.8	346.99
42″	1186	22.4	48	47.75	1117.6	407.01
44″	1251	25.4	36	49.28	1174.8	468.44
46″	1302	25.4	40	50.8	1225.6	522.86
48″	1353	25.4	44	53.85	1276.4	598.35

ASME B16.47 Series B Blind Flange Class 125 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	870	35	24	50.8		227.85
28″	927	35	28	52.4		266.54
30″	984	35	28	54		310.94
32″	1061	41	28	57.2		380.4
34″	1111	41	32	58.7		427.24
36″	1169	41	32	50.3		407.11
38″	1238	41	32	60.3		549.8
40″	1289	41	36	63.5		626.8
42″	1346	41	36	66.7		720.15
44″	1404	41	40	66.7		782.97
46″	1454	41	40	68.3		861.93
48″	1511	41	44	69.9		952.06
50″	1569	48	44	69.9		1017.23
52″	1626	48	44	73		1144.31
54″	1683	48	44	76.2		1283.08
60″	1854	48	52	79.4		1624.02
66″	2032	48	52	85.7		2118.36
72″	2197	48	60	88.9		2569.81
84″	2534	54	64	98.4		3782.32
96″	2877	61	68	108		5342.93

ASME B16.47 Series B Blind Flange Class 300 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	785.88	22.35	36	44.45	711.2	163.4
28″	836.68	22.35	40	47.75	762	199.22
30″	887.48	22.35	44	50.8	812.8	238.76
32″	941.32	22.35	48	53.85	863.6	285.08
34″	1004.8	25.4	40	57.15	920.8	345.31
36″	1057.1	25.4	44	58.67	971.6	392.51
38″	1124	28.45	40	63.5	1022.4	480.11
40″	1174.8	28.45	44	66.55	1079.5	549.91
42″	1225.6	28.45	48	68.33	1130.3	614.6
44″	1276.4	28.45	52	71.37	1181.1	696.47
46″	1341.4	31.75	40	74.68	1234.9	807.6
48″	1392.2	31.75	44	77.72	1289.1	905.2
26″	867	34.9	32	88.9	736.6	388.96
28″	921	34.9	36	88.9	787.4	439.07
30″	991	38.1	36	93.7	844.6	535.02
32″	1054	41.3	32	103.2	901.7	669.71
34″	1108	41.3	36	103.2	952.5	739.5
36″	1172	44.4	32	103.2	1009.6	830.96
38″	1222.2	44.4	36	111.3	1060.5	973.4
40″	1273	44.4	40	115.8	1114.6	1097.73
42″	1334	47.6	36	119.1	1168.4	1243.54
44″	1384.3	47.6	40	127	1219.2	1426.15
46″	1460.5	50.8	36	130.1	1270	1632.23
48″	1511	50.8	40	135	1327.2	1810.26

ASME B16.47 Series B Blind Flange Class 400 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	850.9	38.1	28	88.9	711.2	367.61
28″	914.4	41.15	24	95.25	762	458.74
30″	971.55	41.15	28	101.6	819.15	552.74
32″	1035.1	44.45	28	107.95	873.25	666.35
34″	1085.9	44.45	32	111.25	927.1	755.39
36″	1155.7	47.75	28	119.13	980.95	922

ASME B16.47 Series B Blind Flange Class 600 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	889	44.45	28	111.25	726.95	496.05
28″	952.5	47.75	28	115.82	784.35	593.33
30″	1022.4	50.8	28	127	841.25	751.51
32″	1085.9	53.85	28	134.87	895.35	901.4
34″	1162.1	60.45	24	144.27	952.5	1109.29
36″	1212.9	60.45	28	150.88	1009.7	1259.63

ASME B16.47 Series B Blind Flange Class 900 LBS Dimensions
NPS	D	L	Holes	B	G	Weight
26″	1022.4	66.55	20	153.92	762	893.18
28″	1104.9	73.15	20	166.62	819.15	1126.83
30″	1181.1	79.25	20	176.02	876.3	1357.94
32″	1238.3	79.25	20	185.67	927.1	1590.05
34″	1314.5	85.85	20	195.07	990.6	1877.38
36″	1346.2	79.25	24	201.68	1028.7	2042.37

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