ASME B16.47 Series A Flanges Class 300

Technical Drawings

Dimensions of 300# B16.47 Series A flanges.

NPS	D	K	G	X
26"	970	876.3	749	721
28"	1035	939.8	800	775
30"	1090	997.0	857	827
32"	1150	1054.1	914	881
34"	1205	1104.9	965	937
36"	1270	1168.4	1022	991
38"	1170	1092.2	1029	994
40"	1240	1155.7	1086	1048
42"	1290	1206.5	1137	1099
44"	1355	1263.6	1194	1149
46"	1415	1320.8	1245	1203
48"	1465	1371.6	1302	1254
50"	1530	1428.8	1359	1305
52"	1580	1479.6	1410	1356
54"	1660	1549.4	1467	1410
56"	1710	1600.2	1518	1464
58"	1760	1651.0	1575	1514
60"	1810	1701.8	1626	1565

*D: outside diameter of flange; K: diameter of bolt circle; G: diameter of raised face; X: diameter of hub of flange; All dimensions are in mm.

NPS	A	TBL	TWN	Y
26"	660.4	82.6	77.8	183
28"	711.2	88.9	84.2	195
30"	762.0	93.7	90.5	208
32"	812.8	98.5	96.9	221
34"	863.6	103.2	100.1	230
36"	914.4	109.6	103.2	240
38"	965.2	106.4	106.4	179
40"	1016.0	112.8	112.8	192
42"	1066.8	117.5	117.5	198
44"	1117.6	122.3	122.3	205
46"	1168.4	127.0	127.0	214
48"	1219.2	131.8	131.8	222
50"	1270.0	138.2	138.2	230
52"	1320.8	142.9	142.9	237
54"	1371.6	150.9	150.9	251
56"	1422.4	152.4	152.4	259
58"	1473.2	157.2	157.2	265
60"	1524.0	162.0	162.0	271

*A: Diameter of hub top of WN; T_BL: minimum thickness of blind flange; T_WN: minimum thickness of WN flange. Y: length through hub of WN; t: 2mm height of RF for Class 300 Series A flange. All dimensions are in mm.

NPS	n	d	l	r
26"	28	1-3/4	1-5/8	10
28"	28	1-3/4	1-5/8	11
30"	28	1-7/8	1-3/4	11
32"	28	2	1-7/8	11
34"	28	2	1-7/8	13
36"	32	2-1/8	2	13
38"	32	1-5/8	1-1/2	13
40"	32	1-3/4	1-5/8	13
42"	32	1-3/4	1-5/8	13
44"	32	1-7/8	1-3/4	13
46"	28	2	1-7/8	13
48"	32	2	1-7/8	13
50"	32	2-1/8	2	13
52"	32	2-1/8	2	13
54"	28	2-3/8	2-1/4	13
56"	28	2-3/8	2-1/4	13
58"	32	2-3/8	2-1/4	13
60"	32	2-3/8	2-1/4	13

*n: number of bolt holes; d: diameter of bolt hole; l: diameter of bolt; r: minimum fillet radius for WN. d and l are in inch units, while r is in mm unit.

ASME B16.47 Series A Flanges, by Class
150	300	400	600	900	-
ASME B16.47 Series B Flanges, by Class
75	150	300	400	600	900

*Click to view the dimensions and weights of flanges of ASME B16.47 Series A and Series B at any pressure rating.