ASME B16.47 Series A · ASTM A105 · stock and made to order
38″ Class 600 Weld Neck Flange — ASME B16.47 Series A
38″ Class 600 weld neck flange to ASME B16.47 Series A, machined from ASTM A105. Outside diameter 1270 mm, thickness 152.4 mm, 28 bolt holes on a 1162 mm circle, approximate weight 667 kg. Available with raised face, flat face or the facing specified on your drawing.
Size
38″ / DN950
Standard
ASME B16.47 Series A (ASME B16.47-2025, Series A)
Pressure rating
Class 600
Outside diameter
1270 mm (50″)
Thickness
152.4 mm (6″)
Bolt circle
1162 mm (45.75″)
Approx. weight
667 kg
Full dimensions — 38″ Class 600
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1016 mm (40″) | 108 mm (4.25″) | 749 mm (29.49″) | 914.4 mm (36″) | 28 × Ø50.8 mm (2″) | 748 mm (29.45″) | 222 mm (8.74″) | 426 kg | Details → |
| 28″ | 700 | 1073 mm (42.24″) | 111.3 mm (4.38″) | 800 mm (31.5″) | 965.2 mm (38″) | 28 × Ø54 mm (2.13″) | 803 mm (31.61″) | 235 mm (9.25″) | 481 kg | Details → |
| 30″ | 750 | 1130 mm (44.49″) | 114.3 mm (4.5″) | 857 mm (33.74″) | 1022.4 mm (40.25″) | 28 × Ø54 mm (2.13″) | 862 mm (33.94″) | 248 mm (9.76″) | 549 kg | Details → |
| 32″ | 800 | 1194 mm (47.01″) | 117.3 mm (4.62″) | 914 mm (35.98″) | 1079.5 mm (42.5″) | 28 × Ø60.3 mm (2.37″) | 917 mm (36.1″) | 260 mm (10.24″) | 624 kg | Details → |
| 34″ | 850 | 1245 mm (49.02″) | 120.7 mm (4.75″) | 965 mm (37.99″) | 1130.3 mm (44.5″) | 28 × Ø60.3 mm (2.37″) | 973 mm (38.31″) | 270 mm (10.63″) | 699 kg | Details → |
| 36″ | 900 | 1314 mm (51.73″) | 124 mm (4.88″) | 1022 mm (40.24″) | 1193.8 mm (47″) | 28 × Ø66.7 mm (2.63″) | 1032 mm (40.63″) | 282 mm (11.1″) | 773 kg | Details → |
| 38″ (this size) | 950 | 1270 mm (50″) | 152.4 mm (6″) | 1054 mm (41.5″) | 1162 mm (45.75″) | 28 × Ø60.3 mm (2.37″) | 1022 mm (40.24″) | 254 mm (10″) | 667 kg | Details → |
| 40″ | 1000 | 1321 mm (52.01″) | 158.8 mm (6.25″) | 1111 mm (43.74″) | 1212.8 mm (47.75″) | 32 × Ø60.3 mm (2.37″) | 1073 mm (42.24″) | 264 mm (10.39″) | 739 kg | Details → |
| 42″ | 1050 | 1403 mm (55.24″) | 168.1 mm (6.62″) | 1168 mm (45.98″) | 1282.7 mm (50.5″) | 28 × Ø66.7 mm (2.63″) | 1127 mm (44.37″) | 279 mm (10.98″) | 921 kg | Details → |
| 44″ | 1100 | 1454 mm (57.24″) | 173 mm (6.81″) | 1226 mm (48.27″) | 1333.5 mm (52.5″) | 32 × Ø66.7 mm (2.63″) | 1181 mm (46.5″) | 289 mm (11.38″) | 980 kg | Details → |
| 46″ | 1150 | 1511 mm (59.49″) | 179.4 mm (7.06″) | 1276 mm (50.24″) | 1390.6 mm (54.75″) | 32 × Ø66.7 mm (2.63″) | 1235 mm (48.62″) | 300 mm (11.81″) | 1093 kg | Details → |
| 48″ | 1200 | 1594 mm (62.76″) | 188.9 mm (7.44″) | 1334 mm (52.52″) | 1460.5 mm (57.5″) | 32 × Ø73 mm (2.87″) | 1289 mm (50.75″) | 316 mm (12.44″) | 1295 kg | Details → |
| 50″ | 1250 | 1670 mm (65.75″) | 196.9 mm (7.75″) | 1384 mm (54.49″) | 1524 mm (60″) | 28 × Ø79.4 mm (3.13″) | 1343 mm (52.87″) | 329 mm (12.95″) | 1510 kg | Details → |
| 52″ | 1300 | 1721 mm (67.76″) | 203.2 mm (8″) | 1435 mm (56.5″) | 1574.8 mm (62″) | 32 × Ø79.4 mm (3.13″) | 1394 mm (54.88″) | 337 mm (13.27″) | 1615 kg | Details → |
| 54″ | 1350 | 1778 mm (70″) | 209.6 mm (8.25″) | 1492 mm (58.74″) | 1632 mm (64.25″) | 32 × Ø79.4 mm (3.13″) | 1448 mm (57.01″) | 349 mm (13.74″) | 1778 kg | Details → |
| 56″ | 1400 | 1854 mm (72.99″) | 217.5 mm (8.56″) | 1543 mm (60.75″) | 1695.4 mm (66.75″) | 32 × Ø85.7 mm (3.37″) | 1502 mm (59.13″) | 362 mm (14.25″) | 1941 kg | Details → |
| 58″ | 1450 | 1905 mm (75″) | 222.3 mm (8.75″) | 1600 mm (62.99″) | 1746.2 mm (68.75″) | 32 × Ø85.7 mm (3.37″) | 1553 mm (61.14″) | 370 mm (14.57″) | 2105 kg | Details → |
| 60″ | 1500 | 1994 mm (78.5″) | 233.4 mm (9.19″) | 1657 mm (65.24″) | 1822.4 mm (71.75″) | 28 × Ø92.1 mm (3.63″) | 1610 mm (63.39″) | 389 mm (15.31″) | 2268 kg | Details → |
Published ASME B16.47 Series A dimensions for every Class 600 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 600 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 38″ Class 600
- 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 600
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38″ Class 600 Weld Neck Flange
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