NPS	OD	D	B (WNF)	B (BLF)	H	A
26	660.4	1020	135 141.35	154 160.35	259 265.35	743
28	711.2	1105	147.7 154.05	166.7 173.05	276 282.35	797
30	762	1180	155.6 161.95	176.1 182.45	289 295.35	851
32	812.8	1240	160.4 166.75	186 192.35	303 309.35	908
34	863.6	1315	171.5 177.85	195 201.35	319 325.35	962
36	914.4	1345	173.1 179.45	201.7 208.05	325 331.35	1016
38	965.2	1460	190.5 196.85	215.9 222.25	352 358.35	1073
40	1016	1510	196.9 203.25	223.9 230.25	364 370.35	1127
42	1066.8	1560	206.4 212.75	231.8 238.15	371 377.35	1176
44	1117.6	1650	214.4 220.75	242.9 249.25	391 397.35	1235
46	1168.4	1735	225.6 231.95	255.6 261.95	411 417.35	1292
48	1219.2	1785	233.4 239.75	263.6 269.95	419 425.35	1343

NPS	G	K	L	No of Bolts	Stud Bolt Dia x L
26	762	901.7	66.7	20	2.1/2	425
28	819	971.6	73	20	2.3/4	470
30	876	1035	79.4	20	3	495
32	927	1092.2	79.4	20	3	508
34	991	1155.7	85.7	20	3.1/4	540
36	1029	1200.2	79.4	24	3	533
38	1099	1289	92.1	20	3.1/2	591
40	1162	1339.8	92.1	24	3.1/2	603
42	1213	1390.6	92.1	24	3.1/2	622
44	1270	1463.7	98.4	24	3.3/4	654
46	1334	1536.7	104.8	24	4	686
48	1384	1587.5	104.8	24	4	705

Indications..

• OD = Diameter at Weld Bevel
• D = Overall Diameter of Flange
• B (WNF) = Minimum Thickness of Welding Neck Flange
• B (BLF) = Minimum Thickness of Blind Flange
• H = Length thru Hub
• A = Diameter at Base of Hub
• G = Outside Diameter of Raised Face
• K = Bolt Circle Diameter
• L = Diameter of Bolt Holes

General notes..

• Dimensions are in millimeters unless otherwise indicated.
• For dimensions "B" and "H" click IMPORTANT.
• Blind flanges ASME B16.47 series A flanges (≥ NPS 26) are MSS SP-44 flanges.
  ASME has incorporated the MSS-SP44 specification into B16.47 Series A and the API 605 Specification into B16.47 series B.
  These specification include only Welding Neck and Blind Flanges.
• Dimensions for Classes 400, 600 and 900 NPS 38 and larger for Series B flanges are the same as for the Series A flanges.
• The length of the Stud Bolt does not include the height of the chamfers (points).