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Metric Dimensions Large Bore Flanges Type A as per ASME B16.47

Large Diameter Flange Dimensions Type A Featured

150# | 300# | 400# | 600# | 900#

150# Large Bore Flanges Type A Dimensions as per ASME B16.47

150# Flange Body Dimensions

Large Diameter Flange Type B Dimensions Header

NPS	O Flange OD	tf : Weld Nexk Flange Thickness	tf : Blind Flange Thickness	Y Hub Length	X Hub Dia.	A Top Hub Dia.	R Raised Face Dia.	r1 Fillet Radius
26	870	66.7	66.7	119	676	660.4	749	10
28	925	69.9	69.9	124	727	711.2	800	11
30	985	73.1	73.1	135	781	762.0	857	11
32	1060	79.4	79.4	143	832	812.8	914	11
34	1110	81.0	81	148	883	863.6	965	13
36	1170	88.9	88.9	156	933	914.4	1022	13
38	1240	85.8	85.8	156	991	965.2	1073	13
40	1290	88.9	88.9	162	1041	1016.0	1124	13
42	1345	95.3	95.3	170	1092	1066.8	1194	13
44	1405	100.1	100.1	176	1143	1117.6	1245	13
46	1455	101.6	101.6	184	1197	1168.4	1295	13
48	1510	106.4	106.4	191	1248	1219.2	1359	13
50	1570	109.6	109.6	202	1302	1270.0	1410	13
52	1625	114.3	114.3	208	1353	1320.8	1461	13
54	1685	119.1	119.1	214	1403	1371.6	1511	13
56	1745	122.3	122.3	227	1457	1422.4	1575	13
58	1805	127.0	127	233	1508	1473.2	1626	13
60	1855	130.2	130.2	238	1559	1524.0	1676	13

150# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	806.4	1-3/8″	24	1-1/4″
28	863.6	1-3/8″	28	1-1/4″
30	914.4	1-3/8″	28	1-1/4″
32	977.9	1-5/8″	28	1-1/2″
34	1028.7	1-5/8″	32	1-1/2″
36	1085.8	1-5/8″	32	1-1/2″
38	1149.4	1-5/8″	32	1-1/2″
40	1200.2	1-5/8″	36	1-1/2″
42	1257.3	1-5/8″	36	1-1/2″
44	1314.4	1-5/8″	40	1-1/2″
46	1365.2	1-5/8″	40	1-1/2″
48	1422.4	1-5/8″	44	1-1/2″
50	1479.6	1-7/8″	44	1-3/4″
52	1536.7	1-7/8″	44	1-3/4″
54	1593.8	1-7/8″	44	1-3/4″
56	1651.0	1-7/8″	48	1-3/4″
58	1708.2	1-7/8″	48	1-3/4″
60	1759.0	1-7/8″	52	1-3/4″

150# | 300# | 400# | 600# | 900#

300# Large Bore Flanges Type A Dimensions as per ASME B16.47

300# Flange Body Dimensions

Large Diameter Flange Type B Dimensions Header

NPS	O Flange OD	tf : Weld Nexk Flange Thickness	tf : Blind Flange Thickness	Y Hub Length	X Hub Dia.	A Top Hub Dia.	R Raised Face Dia.	r1 Fillet Radius
26	970	77.8	82.6	183	721	660.4	749	10
28	1035.0	84.2	88.9	195	775.0	711.2	800.0	11
30	1090.0	90.5	93.7	208	827.0	762	857.0	11
32	1150.0	96.9	98.5	221	881.0	812.8	914.0	11
34	1205.0	100.1	103.2	230	937.0	863.6	965.0	13
36	1270.0	103.2	109.6	240	991.0	914.4	1022	13
38	1170.0	106.4	106.4	179	994.0	965.2	1029	13
40	1240.0	112.8	112.8	192	1048	1016	1086	13
42	1290.0	117.5	117.5	198	1099	1066.8	1137	13
44	1355.0	122.3	122.3	205	1149	1117.6	1194	13
46	1415.0	127.0	127	214	1203	1168.4	1245	13
48	1465.0	131.8	131.8	222	1254	1219.2	1302	13
50	1530.0	138.2	138.2	230	1305	1270	1359	13
52	1580.0	142.9	142.9	237	1356	1320.8	1410	13
54	1660.0	150.9	150.9	251	1410	1371.6	1467	13
56	1710.0	152.4	152.4	259	1464	1422.4	1518	13
58	1760.0	157.2	157.2	265	1514	1473.2	1575	13
60	1810.0	162.0	162	271	1565	1524	1626	13

300# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	876.3	1-3/4″	28	1-5/8″
28	939.8	1-3/4″	28	1-5/8″
30	997	1-7/8″	28	1-3/4″
32	1054.1	2″	28	1-7/8″
34	1104.9	2″	28	1-7/8″
36	1168.4	2-1/8″	32	2″
38	1092.2	1-5/8″	32	1-1/2″
40	1155.7	1-3/4″	32	1-5/8″
42	1206.5	1-3/4″	32	1-5/8″
44	1263.6	1-7/8″	32	1-3/4″
46	1320.8	2″	28	1-7/8″
48	1371.6	2″	32	1-7/8″
50	1428.8	2-1/8″	32	2″
52	1479.6	2-1/8″	32	2″
54	1549.4	2-3/8″	28	2-1/4″
56	1600.2	2-3/8″	28	2-1/4″
58	1651.0	2-3/8″	32	2-1/4″
60	1701.8	2-3/8″	32	2-1/4″

150# | 300# | 400# | 600# | 900#

400# Large Bore Flanges Type A Dimensions as per ASME B16.47

400# Flange Body Dimensions

Large Diameter Flange Type B Dimensions Header

NPS	O Flange OD	tf : Weld Nexk Flange Thickness	tf : Blind Flange Thickness	Y Hub Length	X Hub Dia.	A Top Hub Dia.	R Raised Face Dia.	r1 Fillet Radius
26	970	88.9	98.5	194	727	660.4	749	11
28	1035.0	95.3	104.8	206	783.0	711.2	800.0	13
30	1090.0	101.6	111.2	219	837.0	762	857.0	13
32	1150.0	108.0	115.9	232	889.0	812.8	914.0	13
34	1205.0	111.2	122.3	241	945.0	863.6	965.0	14
36	1270.0	114.3	128.6	251	1000.0	914.4	1022.0	14
38	1205.0	123.9	123.9	206	1003.0	965.2	1035.0	14
40	1270.0	130.2	130.2	216	1054.0	1016.0	1092.0	14
42	1320.0	133.4	133.4	224	1108.0	1066.8	1143.0	14
44	1385.0	139.7	139.7	233	1159.0	1117.6	1200.0	14
46	1440.0	146.1	146.1	244	1213.0	1168.4	1257.0	14
48	1510.0	152.4	152.4	257	1267.0	1219.2	1308.0	14
50	1570.0	157.2	158.8	268	1321.0	1270.0	1362.0	14
52	1620.0	162.0	163.6	276	1372.0	1320.8	1413.0	14
54	1700.0	169.9	171.5	289	1426.0	1371.6	1470.0	14
56	1755.0	174.7	176.3	298	1480.0	1422.4	1527.0	14
58	1805.0	177.8	181	306	1530.0	1473.2	1578.0	14
60	1885.0	185.8	189	319	1584.0	1524.0	1635.0	14

400# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	876.3	1-7/8″	28	1-3/4″
28	939.8	2″	28	1-7/8″
30	997	2-1/8″	28	2″
32	1054.1	2-1/8″	28	2″
34	1104.9	2-1/8″	28	2″
36	1168.4	2-1/8″	32	2″
38	1117.6	1-7/8″	32	1-3/4″
40	1174.8	2″	32	1-7/8″
42	1225.6	2″	32	1-7/8″
44	1282.7	2-1/8″	32	2″
46	1339.8	2-1/8″	36	2″
48	1403.4	2-3/8″	28	2-1/4″
50	1460.5	2-3/8″	32	2-1/4″
52	1511.3	2-3/8″	32	2-1/4″
54	1581.2	2-5/8″	28	2-1/2″
56	1632.0	2-5/8″	32	2-1/2″
58	1682.8	2-5/8″	32	2-1/2″
60	1752.6	2-7/8″	32	2-3/4″

150# | 300# | 400# | 600# | 900#

600# Large Bore Flanges Type A Dimensions as per ASME B16.47

600# Flange Body Dimensions

Large Diameter Flange Type B Dimensions Header

NPS	O Flange OD	tf : Weld Nexk Flange Thickness	tf : Blind Flange Thickness	Y Hub Length	X Hub Dia.	A Top Hub Dia.	R Raised Face Dia.	r1 Fillet Radius
26	1015.0	108.0	125.5	222	748.0	660.4	749.0	13
28	1075.0	111.2	131.8	235	803.0	711.2	800.0	13
30	1130.0	114.3	139.7	248	862.0	762	857.0	13
32	1195.0	117.5	147.7	260	918.0	812.8	914.0	13
34	1245.0	120.7	154	270	973.0	863.6	965.0	14
36	1315.0	123.9	162	283	1032.0	914.4	1022.0	14
38	1270.0	152.4	155	254	1022.0	965.2	1054.0	14
40	1320.0	158.8	162	264	1073.0	1016.0	1111.0	14
42	1405.0	168.3	171.5	279	1127.0	1066.8	1168.0	14
44	1455.0	173.1	177.8	289	1181.0	1117.6	1226.0	14
46	1510.0	179.4	185.8	300	1235.0	1168.4	1276.0	14
48	1595.0	189.0	195.3	316	1289.0	1219.2	1334.0	14
50	1670.0	196.9	203.2	329	1343.0	1270.0	1384.0	14
52	1720.0	203.2	209.6	337	1394.0	1320.8	1435.0	14
54	1780.0	209.6	217.5	349	1448.0	1371.6	1492.0	14
56	1855.0	217.5	225.5	362	1502.0	1422.4	1543.0	16
58	1905.0	222.3	231.8	370	1553.0	1473.2	1600.0	16
60	1995.0	233.4	242.9	389	1610.0	1524.0	1657.0	17

600# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	914.4	2″	28	1-7/8″
28	965.2	2-1/8″	28	2″
30	1022.4	2-1/8″	28	2″
32	1079.5	2-3/8″	28	2-1/4″
34	1130.3	2-3/8″	28	2-1/4″
36	1193.8	2-5/8″	28	2-1/2″
38	1162.0	2-3/8″	28	2-1/4″
40	1212.8	2-3/8″	32	2-1/4″
42	1282.7	2-5/8″	28	2-1/2″
44	1333.5	2-5/8″	32	2-1/2″
46	1390.6	2-5/8″	32	2-1/2″
48	1460.5	2-7/8″	32	2-3/4″
50	1524.0	3-1/8″	28	3″
52	1574.8	3-1/8″	32	3″
54	1632.0	3-1/8″	32	3″
56	1695.4	3-3/8″	32	3-1/4″
58	1746.2	3-3/8″	32	3-1/4″
60	1822.4	3-5/8″	28	3-1/2″

150# | 300# | 400# | 600# | 900#

900# Large Bore Flanges Type A Dimensions as per ASME B16.47

900# Flange Body Dimensions

Large Diameter Flange Type B Dimensions Header

NPS	O Flange OD	tf : Weld Nexk Flange Thickness	tf : Blind Flange Thickness	Y Hub Length	X Hub Dia.	A Top Hub Dia.	R Raised Face Dia.	r1 Fillet Radius
26	1085.0	139.7	160.4	286	775.0	660.4	749.0	11
28	1170.0	142.9	171.5	298	832.0	711.2	800.0	13
30	1230.0	149.3	182.6	311	889.0	762	857.0	13
32	1315.0	158.8	193.7	330	946.0	812.8	914.0	13
34	1395.0	165.1	204.8	349	1006.0	863.6	965	14
36	1460.0	171.5	214.4	362	1064.0	914.4	1022.0	14
38	1460.0	190.5	215.9	352	1073.0	965.2	1099.0	19
40	1510.0	196.9	223.9	364	1127.0	1016.0	1162.0	21
42	1560.0	206.4	231.8	371	1176.0	1066.8	1213.0	21
44	1650.0	214.4	242.9	391	1235.0	1117.6	1270.0	22
46	1735.0	225.5	255.6	411	1292.0	1168.4	1334.0	22
48	1785.0	233.4	263.6	419	1343.0	1219.2	1384.0	24
NPS	O Flange OD	tf : Weld Nexk Flange Thickness	tf : Blind Flange Thickness	Y Hub Length	X Hub Dia.	A Top Hub Dia.	R Raised Face Dia.	r1 Fillet Radius

900# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	952.5	2-7/8″	20	2-3/4″
28	1022.4	3-1/8″	20	3″
30	1085.8	3-1/8″	20	3″
32	1155.7	3-3/8″	20	3-1/4″
34	1225.6	3-5/8″	20	3-1/2″
36	1289.0	3-5/8″	20	3-1/2″
38	1289.0	3-5/8″	20	3-1/2″
40	1339.8	3-5/8″	24	3-1/2″
42	1390.6	3-5/8″	24	3-1/2″
44	1463.7	3-7/8″	24	3-3/4″
46	1536.7	4-1/8″	24	4″
48	1587.5	4-1/8″	24	4″
NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt

150# | 300# | 400# | 600# | 900#