Boltex Reference Manual
Boltex
Quality, American-Made Precision Forgings & Flanges
Class 350
| Nominal Size NPS | Outside Diameter of Flange | Diameter of Hub at Base | Outside Diameter of Flange | Diameter of Hub at Base | Thickness of Flange | Length thru Hub | Diameter of Raised Face | Diameter of Bolt Circle | Number of Bolt Holes | Diameter of Bolt Holes | ||||
| SOF | BLIND | |||||||||||||
| O | X | O | X | C | C | C | Y | R | ||||||
| I.D. VESSELS | O.D. VESSELS | I.D. VESS. | O.D. VESS. | I.D. VESSEL | O.D. VESSEL | |||||||||
| 26 | in. | 33.50 | 28.75 | 32.75 | 27.88 | 2.50 | 2.50 | 2.75 | 4.50 | 29.5 | 31.50 | 30.62 | 28 | 1.12 |
| mm. | 850.9 | 730.3 | 831.8 | 708.2 | 63.5 | 63.5 | 69.8 | 114.3 | 749.3 | 800.1 | 777.7 | 28.4 | ||
| 28 | in. | 35.50 | 30.75 | 34.75 | 29.88 | 2.50 | 2.62 | 2.88 | 4.50 | 31.50 | 33.50 | 32.62 | 28 | 1.12 |
| mm. | 901.7 | 781.0 | 882.6 | 759.0 | 63.5 | 66.5 | 73.2 | 114.3 | 800.1 | 850.9 | 828.5 | 28.4 | ||
| 30 | in. | 37.75 | 33.00 | 37.00 | 32.12 | 2.62 | 2.88 | 3.00 | 4.75 | 33.75 | 35.75 | 34.88 | 32 | 1.12 |
| mm. | 958.8 | 838.2 | 939.8 | 815.8 | 66.5 | 73.2 | 76.2 | 120.6 | 857.3 | 908.0 | 886.0 | 28.4 | ||
| 32 | in. | 39.75 | 35.00 | 39.00 | 34.12 | 2.75 | 3.00 | 3.25 | 5.00 | 35.75 | 37.75 | 36.88 | 36 | 1.12 |
| mm. | 1009.7 | 889.0 | 990.6 | 866.6 | 69.8 | 76.2 | 82.5 | 127.0 | 908.0 | 958.8 | 936.8 | 28.4 | ||
| 34 | in. | 42.25 | 37.50 | 41.00 | 36.12 | 2.88 | 3.12 | 3.38 | 5.12 | 37.75 | 40.25 | 38.88 | 40 | 1.12 |
| mm. | 1073.1 | 952.5 | 1041.4 | 917.4 | 73.2 | 79.2 | 85.9 | 130.0 | 958.8 | 1022.3 | 987.6 | 28.4 | ||
| 36 | in. | 44.75 | 39.50 | 43.75 | 38.50 | 3.12 | 3.38 | 3.62 | 5.62 | 40.25 | 42.50 | 41.50 | 40 | 1.12 |
| mm. | 1136.6 | 1003.3 | 1111.3 | 977.9 | 79.2 | 85.9 | 91.9 | 142.7 | 1022.3 | 1079.5 | 1054.1 | 28.4 | ||
| 38 | in. | 46.75 | 41.50 | 45.75 | 40.50 | 3.12 | 3.50 | 3.75 | 5.62 | 42.25 | 44.50 | 43.50 | 40 | 1.25 |
| mm. | 1187.5 | 1054.1 | 1162.1 | 1028.7 | 79.2 | 88.9 | 95.3 | 142.7 | 1073.1 | 1130.3 | 1104.9 | 31.8 | ||
| 40 | in. | 48.75 | 43.50 | 47.75 | 42.50 | 3.25 | 3.69 | 4.00 | 5.88 | 44.25 | 46.50 | 45.50 | 44 | 1.25 |
| mm. | 1238.3 | 1104.9 | 1212.8 | 1079.5 | 82.5 | 93.7 | 101.6 | 149.4 | 1124.0 | 1181.1 | 1155.7 | 31.8 | ||
| 42 | in. | 51.25 | 46.00 | 50.00 | 44.75 | 3.50 | 3.88 | 4.12 | 6.12 | 46.50 | 49.00 | 47.75 | 48 | 1.25 |
| mm. | 1301.8 | 1168.4 | 1270.0 | 1136.6 | 88.9 | 98.6 | 104.6 | 155.4 | 1181.1 | 1244.6 | 1212.8 | 31.8 | ||
| 44 | in. | 54.00 | 48.00 | 52.75 | 46.75 | 3.75 | 4.00 | 4.38 | 6.75 | 48.88 | 51.50 | 50.25 | 48 | 1.38 |
| mm. | 1371.6 | 1219.2 | 1339.8 | 1187.5 | 95.3 | 101.6 | 111.3 | 171.4 | 1241.6 | 1308.1 | 1276.3 | 35.1 | ||
| 46 | in. | 56.00 | 50.00 | 54.75 | 48.75 | 4.25 | 4.25 | 4.75 | 7.25 | 50.88 | 53.50 | 52.25 | 48 | 1.38 |
| mm. | 1422.4 | 1270.0 | 1390.6 | 1238.3 | 107.9 | 107.9 | 120.6 | 184.1 | 1292.4 | 1358.9 | 1327.1 | 35.1 | ||
| 48 | in. | 58.25 | 52.25 | 56.75 | 50.75 | 4.25 | 4.38 | 4.75 | 7.25 | 52.88 | 55.75 | 54.25 | 48 | 1.38 |
| mm. | 1479.6 | 1327.1 | 1441.4 | 1289.1 | 107.9 | 111.3 | 120.6 | 184.1 | 1343.2 | 1416.1 | 1377.9 | 35.1 | ||