ASME B16.47 Series A/MSS SP-44 Class 600 WN

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. The welding neck flange is the best designed butt-welded flange of those currently available because of its inherent structural value. It is expensive because of the design.

Norminal Pipe Size	O.D.of Flange, O	Min.Thick-ness of WN Flange, tf	Lenth Through Hub, Y	Diam. of Hub, X	Hub Diam. Top, A	Raised Fase Diam., R	Bore (XS)	Diam of Bolt Circle	No.of Bolt Holes	Diam.of Bolt Hole	Min.Fillet Radius, r1	Approxi-mate Weight kgs
26	1015	108.0	222	748	660.4	749	635.0	914.4	28	50.8	13	441.66
28	1075	111.2	235	803	711.2	800	685.8	965.2	28	54.0	13	500.13
30	1130	114.3	248	862	762.0	857	736.6	1022.4	28	54.0	13	564.95
32	1195	117.5	260	918	812.0	914	786.6	1079.5	28	60.3	13	636.04
34	1245	120.7	270	973	863.6	965	838.2	1130.3	28	60.3	14	694.71
36	1315	123.9	283	1032	914.4	1022	889.0	1193.8	28	66.7	14	787.50
38	1270	152.4	254	1022	965.2	1054	939.8	1162.0	28	60.3	14	665.35
40	1320	158.8	264	1073	1016.0	1111	990.6	1212.8	32	60.3	14	713.76
42	1405	168.3	279	1127	1066.8	1168	1041.4	1282.7	28	66.7	14	887.56
44	1455	173.1	289	1181	1117.6	1226	1092.2	1333.5	32	66.7	14	939.98
46	1510	179.4	300	1235	1168.4	1276	1143.0	1390.6	32	66.7	14	1036.58
48	1595	189.0	316	1289	1219.2	1334	1193.8	1460.5	32	73.0	14	1236.72
50	1670	196.9	329	1343	1270.0	1384	1244.6	1524.0	28	79.4	14	1436.50
52	1720	203.2	337	1394	1320.8	1435	1295.4	1574.8	32	79.4	14	1504.69
54	1780	209.6	349	1448	1371.6	1492	1346.2	1632.0	32	79.4	14	1661.71
56	1855	217.5	362	1502	1422.4	1543	1397.0	1695.4	32	85.7	16	1867.92
58	1905	222.3	370	1553	1473.2	1600	1447.8	1746.2	32	85.7	16	1976.20
60	1995	233.4	389	1610	1524.0	1657	1498.6	1822.4	28	92.1	17	2378.47