ASME B16.47 Series A/MSS SP-44 Class 150 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	870	66.7	119	676	660.4	749	635.0	806.4	24	34.9	10	149.41
28	925	69.9	124	727	711.2	800	685.8	863.6	28	34.9	11	169.16
30	985	73.1	135	781	762.0	857	736.6	914.2	28	34.9	11	199.94
32	1060	79.4	143	832	812.8	914	787.4	977.9	28	41.3	11	248.11
34	1110	81.0	148	883	863.6	965	838.2	1028.7	32	41.3	13	265.05
36	1170	88.9	156	933	914.4	1022	889.0	1085.8	32	41.3	13	316.63
38	1240	85.8	156	991	965.2	1073	939.8	1149.4	32	41.3	13	352.68
40	1290	88.9	162	1041	1016.0	1124	990.6	1200.2	36	41.3	13	378.89
42	1345	95.3	170	1092	1066.8	1194	1041.4	1257.3	36	41.3	13	431.30
44	1405	100.1	176	1143	1117.6	1245	1092.2	1314.4	40	41.3	13	484.41
46	1455	101.6	184	1197	1168.4	1295	1143.0	1365.2	40	41.3	13	516.92
48	1510	106.4	191	1248	1219.2	1359	1193.8	1422.4	44	41.3	13	567.68
50	1570	109.6	202	1302	1270.0	1410	1244.6	1479.6	44	47.6	13	617.00
52	1625	114.3	208	1353	1320.8	1461	1295.4	1536.7	44	47.6	13	677.24
54	1685	119.1	214	1403	1371.6	1511	1346.2	1593.8	44	47.6	13	752.92
56	1745	122.3	227	1457	1422.4	1575	1397.0	1651.0	48	47.6	13	827.71
58	1805	127.0	233	1508	1473.2	1626	1447.8	1708.2	48	47.6	13	914.15
60	1855	130.2	238	1559	1524.0	1676	1498.6	1759.0	52	47.6	13	959.11