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

Large Diameter Flange Dimensions Type B 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	785	39.8	43.0	87	684	661.9	711	10
28	835	43.0	46.2	94	735	712.7	762	10
30	885	43.0	49.3	98	787	763.5	813	10
32	940	44.6	52.5	106	840	814.3	864	10
34	1005.0	47.7	55.7	109	892.0	865.1	921.0	10
36	1055.0	50.9	57.3	116	945.0	915.9	972.0	10
38	1125.0	52.5	62	122	997.0	968.2	1022.0	10
40	1175.0	54.1	65.2	127	1049.0	1019.0	1080.0	10
42	1225.0	57.3	66.8	132	1102.0	1069.8	1130.0	11
44	1275.0	58.9	70	135	1153.0	1120.6	1181.0	11
46	1340.0	60.4	73.1	143	1205.0	1171.4	1235.0	11
48	1390.0	63.6	76.3	148	1257.0	1222.2	1289.0	11
50	1445.0	66.8	79.5	152	1308.0	1273.0	1340.0	11
52	1495.0	68.4	82.7	156	1360.0	1323.8	1391.0	11
54	1550.0	70.0	85.8	160	1413.0	1374.6	1441.0	11
56	1600.0	71.6	89	165	1465.0	1425.4	1492.0	14
58	1675.0	73.1	91.9	173	1516.0	1476.2	1543.0	14
60	1725.0	74.7	95.4	178	1570.0	1527.0	1600.0	14

150# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	744.5	7/8″	36	3/4″
28	795.3	7/8″	40	3/4″
30	846.1	7/8″	44	3/4″
32	900.1	7/8″	48	3/4″
34	957.3	1″	40	7/8″
36	1009.6	1″	44	7/8″
38	1070.0	1-1/8″	40	1″
40	1120.8	1-1/8″	44	1″
42	1171.6	1-1/8″	48	1″
44	1222.4	1-1/8″	52	1″
46	1284.3	1-1/4″	40	1-1/8″
48	1335.1	1-1/4″	44	1-1/8″
50	1385.9	1-1/4″	48	1-1/8″
52	1436.7	1-1/4″	52	1-1/8″
54	1492.2	1-1/4″	56	1-1/8″
56	1543.0	1-1/4″	60	1-1/8″
58	1611.3	1-3/8″	48	1-1/4″
60	1662.1	1-3/8″	52	1-1/4″

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	865	87.4	87.4	168	702	665.2	737	14
28	920	87.4	87.4	148	756	716.0	787	14
30	990	92.1	92.1	156	813	768.4	845	14
32	1055.0	101.6	101.6	167	864.0	819.2	902.0	16
34	1110.0	101.6	101.6	171	918.0	870	953.0	16
36	1170.0	101.6	101.6	179	965.0	920.8	1010.0	16
38	1220.0	109.6	109.6	165	1016.0	971.6	1060.0	16
40	1275.0	114.3	114.3	197	1067.0	1022.4	1114.0	16
42	1335.0	117.5	117.5	203	1118.0	1074.7	1168.0	16
44	1385.0	125.5	125.5	213	1173.0	1125.5	1219.0	16
46	1460.0	127.0	128.6	221	1229.0	1176.3	1270.0	16
48	1510.0	127.0	133.4	222	1278.0	1227.1	1327.0	16
50	1560.0	136.6	138.2	233	1330.0	1277.9	1378.0	16
52	1615.0	141.3	142.6	241	1383.0	1328.7	1429.0	16
54	1675.0	135.0	147.7	238	1435.0	1379.5	1480.0	16
56	1765.0	152.4	155.4	267	1494.0	1430.3	1537.0	17
58	1825.0	152.4	160.4	273	1548.0	1481.1	1594.0	17
60	1880.0	149.3	165.1	270	1599.0	1557.3	1651.0	17

300# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	803.3	1-3/8″	32	1-1/4″
28	857.2	1-3/8″	36	1-1/4″
30	920.8	1-1/2″	36	1-3/8″
32	977.9	1-5/8″	32	1-1/2″
34	1031.9	1-5/8″	36	1-1/2″
36	1089.0	1-3/4″	32	1-5/8″
38	1139.8	1-3/4″	36	1-5/8″
40	1190.6	1-3/4″	40	1-5/8″
42	1244.6	1-7/8″	36	1-3/4″
44	1295.4	1-7/8″	40	1-3/4″
46	1365.2	2″	36	1-7/8″
48	1416.0	2″	40	1-7/8″
50	1466.8	2″	44	1-7/8″
52	1517.6	2″	48	1-7/8″
54	1578.0	2″	48	1-7/8″
56	1651.0	2-3/8″	36	2-1/4″
58	1712.9	2-3/8″	40	2-1/4″
60	1763.7	2-3/8″	40	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	850	88.9	88.9	149	689	660.4	711	11
28	915	95.3	95.3	159	740	711.2	762	13
30	970	101.6	101.6	170	794	762.0	819	13
32	1035.0	108.0	108	179	845.0	812.8	873.0	13
34	1085.0	111.2	111.2	187	899.0	863.6	927.0	14
36	1155.0	119.1	119.1	200	952.0	914.4	981.0	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	781.0	1-1/2″	28	1-3/8″
28	838.2	1-5/8″	24	1-1/2″
30	895.4	1-5/8″	28	1-1/2″
32	952.5	1-3/4″	28	1-5/8″
34	1003.3	1-3/4″	32	1-5/8″
36	1066.8	1-7/8″	28	1-3/4″

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	890	111.2	111.3	181	698	660.4	727	13
28	950	115.9	115.9	190	752	711.2	784	13
30	1020.0	125.5	127	205	806.0	762	841.0	13
32	1085.0	130.2	134.9	216	860.0	812.8	895.0	13
34	1160.0	141.3	144.2	233	914.0	863.6	953.0	14
36	1215.0	146.1	150.9	243	968.0	914.4	1010.0	14

600# 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	1-3/4″	28	1-5/8″
28	863.6	1-7/8″	28	1-3/4″
30	927.1	2″	28	1-7/8″
32	984.2	2-1/8″	28	2″
34	1054.1	2-3/8″	24	2-1/4″
36	1104.9	2-3/8″	28	2-1/4″

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	1020.0	135.0	154	259	743.0	660.4	762.0	11
28	1105.0	147.7	166.7	276	797.0	711.2	819.0	13
30	1180.0	155.6	176.1	289	851.0	762	876.0	13
32	1240.0	160.4	186	303	908.0	812.8	927.0	13
34	1315.0	171.5	195	319	962.0	863.6	991.0	14
36	1345.0	173.1	201.7	325	1016.0	914.4	1029.0	14

900# Bolts Template

Flange Drilling Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt
26	901.7	2-5/8″	20	2-1/2″
28	971.6	2-7/8″	20	2-3/4″
30	1035.0	3-1/8″	20	3″
32	1092.2	3-1/8″	20	3″
34	1155.7	3-3/8″	20	3-1/4″
36	1200.2	3-1/8″	24	3″

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