ASME B16.47 Series A · ASTM A105 · stock and made to order
30″ Class 300 Weld Neck Flange — ASME B16.47 Series A
30″ Class 300 weld neck flange to ASME B16.47 Series A, machined from ASTM A105. Outside diameter 1092 mm, thickness 90.7 mm, 28 bolt holes on a 997 mm circle, approximate weight 395 kg. Available with raised face, flat face or the facing specified on your drawing.
Size
30″ / DN750
Standard
ASME B16.47 Series A (ASME B16.47-2025, Series A)
Pressure rating
Class 300
Outside diameter
1092 mm (42.99″)
Thickness
90.7 mm (3.57″)
Bolt circle
997 mm (39.25″)
Approx. weight
395 kg
Full dimensions — 30″ Class 300
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 972 mm (38.27″) | 78 mm (3.07″) | 749 mm (29.49″) | 876.3 mm (34.5″) | 28 × Ø44.5 mm (1.75″) | 721 mm (28.39″) | 183 mm (7.2″) | 274 kg | Details → |
| 28″ | 700 | 1035 mm (40.75″) | 84.3 mm (3.32″) | 800 mm (31.5″) | 939.8 mm (37″) | 28 × Ø44.5 mm (1.75″) | 775 mm (30.51″) | 195 mm (7.68″) | 338 kg | Details → |
| 30″ (this size) | 750 | 1092 mm (42.99″) | 90.7 mm (3.57″) | 857 mm (33.74″) | 997 mm (39.25″) | 28 × Ø47.6 mm (1.87″) | 827 mm (32.56″) | 208 mm (8.19″) | 395 kg | Details → |
| 32″ | 800 | 1149 mm (45.24″) | 97 mm (3.82″) | 914 mm (35.98″) | 1054.1 mm (41.5″) | 28 × Ø50.8 mm (2″) | 881 mm (34.69″) | 221 mm (8.7″) | 456 kg | Details → |
| 34″ | 850 | 1206 mm (47.48″) | 100.1 mm (3.94″) | 965 mm (37.99″) | 1104.9 mm (43.5″) | 28 × Ø50.8 mm (2″) | 937 mm (36.89″) | 230 mm (9.06″) | 519 kg | Details → |
| 36″ | 900 | 1270 mm (50″) | 103.4 mm (4.07″) | 1022 mm (40.24″) | 1168.4 mm (46″) | 32 × Ø54 mm (2.13″) | 991 mm (39.02″) | 240 mm (9.45″) | 578 kg | Details → |
| 38″ | 950 | 1168 mm (45.98″) | 106.4 mm (4.19″) | 1029 mm (40.51″) | 1092.2 mm (43″) | 32 × Ø41.3 mm (1.63″) | 994 mm (39.13″) | 179 mm (7.05″) | 315 kg | Details → |
| 40″ | 1000 | 1238 mm (48.74″) | 112.8 mm (4.44″) | 1086 mm (42.76″) | 1155.7 mm (45.5″) | 32 × Ø44.5 mm (1.75″) | 1048 mm (41.26″) | 192 mm (7.56″) | 381 kg | Details → |
| 42″ | 1050 | 1289 mm (50.75″) | 117.6 mm (4.63″) | 1137 mm (44.76″) | 1206.5 mm (47.5″) | 32 × Ø44.5 mm (1.75″) | 1099 mm (43.27″) | 199 mm (7.83″) | 431 kg | Details → |
| 44″ | 1100 | 1353 mm (53.27″) | 122.4 mm (4.82″) | 1194 mm (47.01″) | 1263.6 mm (49.75″) | 32 × Ø47.6 mm (1.87″) | 1149 mm (45.24″) | 205 mm (8.07″) | 479 kg | Details → |
| 46″ | 1150 | 1416 mm (55.75″) | 127 mm (5″) | 1245 mm (49.02″) | 1320.8 mm (52″) | 28 × Ø50.8 mm (2″) | 1203 mm (47.36″) | 214 mm (8.43″) | 560 kg | Details → |
| 48″ | 1200 | 1467 mm (57.76″) | 131.8 mm (5.19″) | 1302 mm (51.26″) | 1371.6 mm (54″) | 32 × Ø50.8 mm (2″) | 1254 mm (49.37″) | 222 mm (8.74″) | 626 kg | Details → |
| 50″ | 1250 | 1530 mm (60.24″) | 138.2 mm (5.44″) | 1359 mm (53.5″) | 1428.8 mm (56.25″) | 32 × Ø54 mm (2.13″) | 1305 mm (51.38″) | 230 mm (9.06″) | 694 kg | Details → |
| 52″ | 1300 | 1581 mm (62.24″) | 143 mm (5.63″) | 1410 mm (55.51″) | 1479.6 mm (58.25″) | 32 × Ø54 mm (2.13″) | 1356 mm (53.39″) | 237 mm (9.33″) | 753 kg | Details → |
| 54″ | 1350 | 1657 mm (65.24″) | 150.9 mm (5.94″) | 1467 mm (57.76″) | 1549.4 mm (61″) | 28 × Ø60.3 mm (2.37″) | 1410 mm (55.51″) | 251 mm (9.88″) | 930 kg | Details → |
| 56″ | 1400 | 1708 mm (67.24″) | 152.4 mm (6″) | 1518 mm (59.76″) | 1600.2 mm (63″) | 28 × Ø60.3 mm (2.37″) | 1464 mm (57.64″) | 259 mm (10.2″) | 977 kg | Details → |
| 58″ | 1450 | 1759 mm (69.25″) | 157.2 mm (6.19″) | 1575 mm (62.01″) | 1651 mm (65″) | 32 × Ø60.3 mm (2.37″) | 1514 mm (59.61″) | 265 mm (10.43″) | 1030 kg | Details → |
| 60″ | 1500 | 1810 mm (71.26″) | 162.1 mm (6.38″) | 1626 mm (64.02″) | 1701.8 mm (67″) | 32 × Ø60.3 mm (2.37″) | 1565 mm (61.61″) | 272 mm (10.71″) | 1120 kg | Details → |
Published ASME B16.47 Series A dimensions for every Class 300 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 300 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 30″ Class 300
- 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 300
Request a quotation
30″ Class 300 Weld Neck Flange
Tell us the quantity, face type, material and delivery port. We will confirm price, lead time and the applicable certificate within one business day.
Send an Inquiry
Send drawings, dimensions or a standard reference. Our sales engineers reply within 24 hours on business days.