ASME B16.47 Series A · ASTM A105 · stock and made to order
34″ Class 150 Weld Neck Flange — ASME B16.47 Series A
34″ Class 150 weld neck flange to ASME B16.47 Series A, machined from ASTM A105. Outside diameter 1111 mm, thickness 81 mm, 32 bolt holes on a 1028.7 mm circle, approximate weight 245 kg. Available with raised face, flat face or the facing specified on your drawing.
Size
34″ / DN850
Standard
ASME B16.47 Series A (ASME B16.47-2025, Series A)
Pressure rating
Class 150
Outside diameter
1111 mm (43.74″)
Thickness
81 mm (3.19″)
Bolt circle
1028.7 mm (40.5″)
Approx. weight
245 kg
Full dimensions — 34″ Class 150
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 870 mm (34.25″) | 66.8 mm (2.63″) | 749 mm (29.49″) | 806.4 mm (31.75″) | 24 × Ø34.9 mm (1.37″) | 676 mm (26.61″) | 119 mm (4.69″) | 136 kg | Details → |
| 28″ | 700 | 927 mm (36.5″) | 69.8 mm (2.75″) | 800 mm (31.5″) | 863.6 mm (34″) | 28 × Ø34.9 mm (1.37″) | 727 mm (28.62″) | 124 mm (4.88″) | 156 kg | Details → |
| 30″ | 750 | 984 mm (38.74″) | 73.2 mm (2.88″) | 857 mm (33.74″) | 914.4 mm (36″) | 28 × Ø34.9 mm (1.37″) | 781 mm (30.75″) | 135 mm (5.31″) | 181 kg | Details → |
| 32″ | 800 | 1060 mm (41.73″) | 79.5 mm (3.13″) | 914 mm (35.98″) | 977.9 mm (38.5″) | 28 × Ø41.3 mm (1.63″) | 832 mm (32.76″) | 143 mm (5.63″) | 229 kg | Details → |
| 34″ (this size) | 850 | 1111 mm (43.74″) | 81 mm (3.19″) | 965 mm (37.99″) | 1028.7 mm (40.5″) | 32 × Ø41.3 mm (1.63″) | 883 mm (34.76″) | 148 mm (5.83″) | 245 kg | Details → |
| 36″ | 900 | 1168 mm (45.98″) | 88.9 mm (3.5″) | 1022 mm (40.24″) | 1085.8 mm (42.75″) | 32 × Ø41.3 mm (1.63″) | 933 mm (36.73″) | 156 mm (6.14″) | 290 kg | Details → |
| 38″ | 950 | 1238 mm (48.74″) | 85.9 mm (3.38″) | 1073 mm (42.24″) | 1149.4 mm (45.25″) | 32 × Ø41.3 mm (1.63″) | 991 mm (39.02″) | 156 mm (6.14″) | 327 kg | Details → |
| 40″ | 1000 | 1289 mm (50.75″) | 88.9 mm (3.5″) | 1124 mm (44.25″) | 1200.2 mm (47.25″) | 36 × Ø41.3 mm (1.63″) | 1041 mm (40.98″) | 162 mm (6.38″) | 352 kg | Details → |
| 42″ | 1050 | 1346 mm (52.99″) | 95.2 mm (3.75″) | 1194 mm (47.01″) | 1257.3 mm (49.5″) | 36 × Ø41.3 mm (1.63″) | 1092 mm (42.99″) | 170 mm (6.69″) | 404 kg | Details → |
| 44″ | 1100 | 1403 mm (55.24″) | 100.1 mm (3.94″) | 1245 mm (49.02″) | 1314.4 mm (51.75″) | 40 × Ø41.3 mm (1.63″) | 1143 mm (45″) | 176 mm (6.93″) | 449 kg | Details → |
| 46″ | 1150 | 1454 mm (57.24″) | 101.6 mm (4″) | 1295 mm (50.98″) | 1365.2 mm (53.75″) | 40 × Ø41.3 mm (1.63″) | 1197 mm (47.13″) | 184 mm (7.24″) | 481 kg | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 106.4 mm (4.19″) | 1359 mm (53.5″) | 1422.4 mm (56″) | 44 × Ø41.3 mm (1.63″) | 1248 mm (49.13″) | 191 mm (7.52″) | 538 kg | Details → |
| 50″ | 1250 | 1568 mm (61.73″) | 109.7 mm (4.32″) | 1410 mm (55.51″) | 1479.6 mm (58.25″) | 44 × Ø47.6 mm (1.87″) | 1302 mm (51.26″) | 202 mm (7.95″) | 576 kg | Details → |
| 52″ | 1300 | 1626 mm (64.02″) | 114.3 mm (4.5″) | 1461 mm (57.52″) | 1536.7 mm (60.5″) | 44 × Ø47.6 mm (1.87″) | 1353 mm (53.27″) | 208 mm (8.19″) | 640 kg | Details → |
| 54″ | 1350 | 1683 mm (66.26″) | 119.1 mm (4.69″) | 1511 mm (59.49″) | 1593.8 mm (62.75″) | 44 × Ø47.6 mm (1.87″) | 1403 mm (55.24″) | 214 mm (8.43″) | 719 kg | Details → |
| 56″ | 1400 | 1746 mm (68.74″) | 122.4 mm (4.82″) | 1575 mm (62.01″) | 1651 mm (65″) | 48 × Ø47.6 mm (1.87″) | 1457 mm (57.36″) | 227 mm (8.94″) | 798 kg | Details → |
| 58″ | 1450 | 1803 mm (70.98″) | 127 mm (5″) | 1626 mm (64.02″) | 1708.2 mm (67.25″) | 48 × Ø47.6 mm (1.87″) | 1508 mm (59.37″) | 233 mm (9.17″) | 869 kg | Details → |
| 60″ | 1500 | 1854 mm (72.99″) | 130.3 mm (5.13″) | 1676 mm (65.98″) | 1759 mm (69.25″) | 52 × Ø47.6 mm (1.87″) | 1559 mm (61.38″) | 238 mm (9.37″) | 928 kg | Details → |
Published ASME B16.47 Series A dimensions for every Class 150 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 150 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 34″ Class 150
- 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 150
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34″ Class 150 Weld Neck Flange
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