ASME B16.47 Series B · ASTM A105 · stock and made to order
40″ Class 900 Blind Flange — ASME B16.47 Series B
40″ Class 900 blind flange to ASME B16.47 Series B, machined from ASTM A105. Outside diameter 1511 mm, thickness 223.8 mm, 24 bolt holes on a 1339.8 mm circle. Available with raised face, flat face or the facing specified on your drawing.
Size
40″ / DN1000
Standard
ASME B16.47 Series B (ASME B16.47-2025, Series B)
Pressure rating
Class 900
Outside diameter
1511 mm (59.49″)
Thickness
223.8 mm (8.81″)
Bolt circle
1339.8 mm (52.75″)
Full dimensions — 40″ Class 900
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1022 mm (40.24″) | 154 mm (6.06″) | 762 mm (30″) | 901.7 mm (35.5″) | 20 × Ø66.7 mm (2.63″) | 991 kg | Details → |
| 28″ | 700 | 1105 mm (43.5″) | 166.7 mm (6.56″) | 819 mm (32.24″) | 971.6 mm (38.25″) | 20 × Ø73 mm (2.87″) | 1253 kg | Details → |
| 30″ | 750 | 1181 mm (46.5″) | 176 mm (6.93″) | 876 mm (34.49″) | 1035 mm (40.75″) | 20 × Ø79.4 mm (3.13″) | 1512 kg | Details → |
| 32″ | 800 | 1238 mm (48.74″) | 185.7 mm (7.31″) | 927 mm (36.5″) | 1092.2 mm (43″) | 20 × Ø79.4 mm (3.13″) | 1753 kg | Details → |
| 34″ | 850 | 1314 mm (51.73″) | 195 mm (7.68″) | 991 mm (39.02″) | 1155.7 mm (45.5″) | 20 × Ø85.7 mm (3.37″) | 2075 kg | Details → |
| 36″ | 900 | 1346 mm (52.99″) | 201.6 mm (7.94″) | 1029 mm (40.51″) | 1200.2 mm (47.25″) | 24 × Ø79.4 mm (3.13″) | 2251 kg | Details → |
| 38″ | 950 | 1460 mm (57.48″) | 215.9 mm (8.5″) | 1099 mm (43.27″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | — | Details → |
| 40″ (this size) | 1000 | 1511 mm (59.49″) | 223.8 mm (8.81″) | 1162 mm (45.75″) | 1339.8 mm (52.75″) | 24 × Ø92.1 mm (3.63″) | — | Details → |
| 42″ | 1050 | 1562 mm (61.5″) | 231.6 mm (9.12″) | 1213 mm (47.76″) | 1390.6 mm (54.75″) | 24 × Ø92.1 mm (3.63″) | — | Details → |
| 44″ | 1100 | 1648 mm (64.88″) | 242.9 mm (9.56″) | 1270 mm (50″) | 1463.5 mm (57.62″) | 24 × Ø98.4 mm (3.87″) | — | Details → |
| 46″ | 1150 | 1734 mm (68.27″) | 255.6 mm (10.06″) | 1334 mm (52.52″) | 1536.7 mm (60.5″) | 24 × Ø104.8 mm (4.13″) | — | Details → |
| 48″ | 1200 | 1784 mm (70.24″) | 263.5 mm (10.37″) | 1384 mm (54.49″) | 1587.5 mm (62.5″) | 24 × Ø104.8 mm (4.13″) | — | Details → |
Published ASME B16.47 Series B dimensions for every Class 900 size in this product family.
Dimensions in millimetres; the inch equivalent is shown in brackets. Bolt hole diameter applies to through-holes. For stud length, gasket and bolting selection, match the gasket and bolts to B16.47 B.
What Class 900 means in service
Series B follows the former API 605 dimensions, with a smaller outside diameter and a different bolt pattern from Series A. Ratings are ASME classes 150, 300, 400, 600 and 900, with allowable pressure from the B16.47 tables.
Series B follows the former API 605 dimensions, with a smaller outside diameter and a different bolt pattern from Series A. Ratings are ASME classes 150, 300, 400, 600 and 900, with allowable pressure from the B16.47 tables.
Facing and materials
Raised face (RF) is standard: 1.5 mm high for Classes 75, 150 and 300; 6.4 mm for Classes 400, 600 and 900. FF and RTJ faces are available to drawing.
- ASTM A105 / A105N
- ASTM A350 LF2
- ASTM A182 F304/F316L
- ASTM A694 F52/F60/F65
- ASTM A182 F51/F53
Other grades, impact-tested heats and NACE MR0175 requirements are quoted on request. Material certificates to EN 10204 3.1 are issued against the same heat number as the dimensional report.
Inspection and delivery
- Dimensional inspection against the B16.47 B table for 40″ Class 900
- Heat number stamped on the rim; EN 10204 3.1 certificate issued
- PMI on stainless and alloy heats; UT/RT on request
- Anti-rust oil, plywood case or pallet, with packing list and MTC
- Typical lead time 7–15 days for carbon steel stock sizes, 20–30 days for alloys
Other sizes in Class 900
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40″ Class 900 Blind Flange
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