ASME B16.47 Series A · ASTM A105 · stock and made to order
48″ Class 900 Weld Neck Flange — ASME B16.47 Series A
48″ Class 900 weld neck flange to ASME B16.47 Series A, machined from ASTM A105. Outside diameter 1784 mm, thickness 233.4 mm, 24 bolt holes on a 1587.5 mm circle, approximate weight 2259 kg. Available with raised face, flat face or the facing specified on your drawing.
Size
48″ / DN1200
Standard
ASME B16.47 Series A (ASME B16.47-2025, Series A)
Pressure rating
Class 900
Outside diameter
1784 mm (70.24″)
Thickness
233.4 mm (9.19″)
Bolt circle
1587.5 mm (62.5″)
Approx. weight
2259 kg
Full dimensions — 48″ Class 900
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1086 mm (42.76″) | 139.7 mm (5.5″) | 749 mm (29.49″) | 952.5 mm (37.5″) | 20 × Ø73 mm (2.87″) | 775 mm (30.51″) | 286 mm (11.26″) | 692 kg | Details → |
| 28″ | 700 | 1168 mm (45.98″) | 142.7 mm (5.62″) | 800 mm (31.5″) | 1022.4 mm (40.25″) | 20 × Ø79.4 mm (3.13″) | 832 mm (32.76″) | 298 mm (11.73″) | 821 kg | Details → |
| 30″ | 750 | 1232 mm (48.5″) | 149.4 mm (5.88″) | 857 mm (33.74″) | 1085.8 mm (42.75″) | 20 × Ø79.4 mm (3.13″) | 889 mm (35″) | 311 mm (12.24″) | 962 kg | Details → |
| 32″ | 800 | 1314 mm (51.73″) | 158.8 mm (6.25″) | 914 mm (35.98″) | 1155.7 mm (45.5″) | 20 × Ø85.7 mm (3.37″) | 946 mm (37.24″) | 330 mm (12.99″) | 1154 kg | Details → |
| 34″ | 850 | 1397 mm (55″) | 165.1 mm (6.5″) | 965 mm (37.99″) | 1225.6 mm (48.25″) | 20 × Ø92.1 mm (3.63″) | 1006 mm (39.61″) | 349 mm (13.74″) | 1347 kg | Details → |
| 36″ | 900 | 1460 mm (57.48″) | 171.5 mm (6.75″) | 1022 mm (40.24″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | 1064 mm (41.89″) | 362 mm (14.25″) | 1540 kg | Details → |
| 38″ | 950 | 1460 mm (57.48″) | 190.5 mm (7.5″) | 1099 mm (43.27″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | 1073 mm (42.24″) | 353 mm (13.9″) | 1535 kg | Details → |
| 40″ | 1000 | 1511 mm (59.49″) | 196.9 mm (7.75″) | 1162 mm (45.75″) | 1339.8 mm (52.75″) | 24 × Ø92.1 mm (3.63″) | 1127 mm (44.37″) | 363 mm (14.29″) | 1642 kg | Details → |
| 42″ | 1050 | 1562 mm (61.5″) | 206.2 mm (8.12″) | 1213 mm (47.76″) | 1390.6 mm (54.75″) | 24 × Ø92.1 mm (3.63″) | 1176 mm (46.3″) | 371 mm (14.61″) | 1796 kg | Details → |
| 44″ | 1100 | 1648 mm (64.88″) | 214.3 mm (8.44″) | 1270 mm (50″) | 1463.5 mm (57.62″) | 24 × Ø98.4 mm (3.87″) | 1235 mm (48.62″) | 391 mm (15.39″) | 1950 kg | Details → |
| 46″ | 1150 | 1734 mm (68.27″) | 225.6 mm (8.88″) | 1334 mm (52.52″) | 1536.7 mm (60.5″) | 24 × Ø104.8 mm (4.13″) | 1292 mm (50.87″) | 411 mm (16.18″) | 2105 kg | Details → |
| 48″ (this size) | 1200 | 1784 mm (70.24″) | 233.4 mm (9.19″) | 1384 mm (54.49″) | 1587.5 mm (62.5″) | 24 × Ø104.8 mm (4.13″) | 1343 mm (52.87″) | 419 mm (16.5″) | 2259 kg | Details → |
Published ASME B16.47 Series A 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 A.
What Class 900 means in service
Series A follows the former MSS SP-44 dimensions. Ratings are ASME classes 150, 300, 400, 600 and 900, with allowable pressures read from the B16.47 pressure–temperature tables for the material group and design temperature.
Series A follows the former MSS SP-44 dimensions. Ratings are ASME classes 150, 300, 400, 600 and 900, with allowable pressures read from the B16.47 pressure–temperature tables for the material group and design temperature.
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. Flat face (FF) and ring-type joint (RTJ) faces are available against the 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 A table for 48″ 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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48″ Class 900 Weld Neck Flange
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