ASME B16.5 Flange Weight Chart
Approximate weights of ASME B16.5 weld neck, slip-on and blind flanges in kilograms, by nominal pipe size and pressure class. Use them for freight estimates, lifting plans and material take-offs.
Flange weight is not specified by ASME B16.5. Values vary between manufacturers and, for weld neck flanges, with the bore schedule. Where published catalogue values disagree by more than about 10% the cell is left blank; for an exact figure use our flange weight calculator or ask for the weight on your quotation.
ASME B16.5 Flange Weight Chart — tables
Weld neck flange weight (kg, approximate)
| NPSin | Class 150kg | Class 300kg | Class 600kg | Class 900kg | Class 1500kg | Class 2500kg |
|---|---|---|---|---|---|---|
| ½" | — | — | 0.9 | — | — | 3.6 |
| ¾" | — | 1.3 | 1.8 | — | — | 4.1 |
| 1" | 1.1 | 1.6 | 1.8 | 4.1 | 4.1 | 5.9 |
| 1¼" | 1.4 | 2.1 | 2.7 | 4.5 | 4.5 | 9.1 |
| 1½" | 1.8 | 3.1 | 3.6 | 6.4 | 6.4 | 12.7 |
| 2" | 2.6 | 3.4 | 5.4 | 11.3 | 11.3 | 19.1 |
| 2½" | 4.3 | 5.3 | 8.1 | 16.3 | 16.3 | 23.6 |
| 3" | 5.2 | 7.3 | 10.4 | 13.6 | 21.8 | 42.6 |
| 3½" | 5.5 | 8.2 | 11.8 | — | — | — |
| 4" | 7.3 | 11.3 | 19.0 | 24.0 | 33.1 | 66.2 |
| 5" | 8.9 | 15.1 | 31.0 | 39.0 | 59.9 | 111 |
| 6" | 11.3 | 19.7 | 37.0 | 50.0 | 74.8 | 171 |
| 8" | 17.7 | 30.5 | 52.0 | 84.0 | 125 | 261 |
| 10" | 24.8 | 43.7 | 86.0 | 121 | 206 | 484 |
| 12" | 39.0 | 64.4 | 102 | — | 313 | 729 |
| 14" | 51.7 | 88.3 | — | — | 426 | — |
| 16" | 64.4 | 113 | — | — | 567 | — |
| 18" | 74.8 | 138 | — | — | 737 | — |
| 20" | 89.4 | 167 | — | — | 930 | — |
| 24" | 120 | 235 | — | — | 1508 | — |
Slip-on flange weight (kg, approximate)
| NPSin | Class 150kg | Class 300kg | Class 600kg | Class 900kg | Class 1500kg | Class 2500kg |
|---|---|---|---|---|---|---|
| ½" | 0.5 | 0.6 | 0.9 | 1.8 | — | — |
| ¾" | — | 1.1 | 1.4 | 2.3 | — | — |
| 1" | 0.9 | 1.4 | 1.8 | 3.4 | — | — |
| 1¼" | 1.1 | — | 2.3 | 4.3 | — | — |
| 1½" | 1.4 | — | 3.2 | 5.5 | — | — |
| 2" | 2.3 | 2.8 | 4.1 | 10.0 | — | — |
| 2½" | 3.4 | 4.2 | 5.9 | 16.3 | — | — |
| 3" | 3.9 | 5.8 | 7.3 | — | — | — |
| 3½" | 5.0 | 7.7 | 9.5 | — | — | — |
| 4" | 5.8 | 10.1 | 16.8 | 24.0 | — | — |
| 5" | 6.2 | 12.6 | 29.0 | 38.0 | — | — |
| 6" | 7.4 | 16.0 | 36.0 | 50.0 | — | — |
| 8" | 12.4 | 24.5 | 52.0 | 78.0 | — | — |
| 10" | 17.1 | 34.2 | 77.0 | 111 | — | — |
| 12" | 27.7 | 51.3 | 97.0 | 148 | — | — |
| 14" | 35.2 | 72.1 | 111 | 181 | — | — |
| 16" | 42.2 | 90.4 | 157 | 200 | — | — |
| 18" | 49.7 | 109 | — | 282 | — | — |
| 20" | 65.5 | 136 | — | 344 | — | — |
| 24" | 90.5 | 204 | — | 651 | — | — |
Blind flange weight (kg, approximate)
| NPSin | Class 150kg | Class 300kg | Class 600kg | Class 900kg | Class 1500kg | Class 2500kg |
|---|---|---|---|---|---|---|
| ½" | 0.5 | — | — | 1.8 | 1.8 | 3.2 |
| ¾" | — | — | 1.4 | 2.7 | 2.7 | — |
| 1" | 0.9 | 1.4 | 1.8 | 3.7 | 3.7 | 5.0 |
| 1¼" | 1.2 | — | 2.3 | 4.1 | 4.1 | 7.8 |
| 1½" | 1.6 | — | 3.6 | 5.9 | 5.9 | 10.5 |
| 2" | 2.6 | — | 4.5 | 10.1 | 10.1 | 18 |
| 2½" | — | 4.8 | 6.8 | 15.9 | 15.9 | 25.5 |
| 3" | — | 6.8 | 9.1 | 13.2 | 21.8 | 39 |
| 3½" | 5.9 | 9.5 | 13.2 | — | — | — |
| 4" | 7.4 | 12.0 | 18.6 | 24.0 | 33 | 61.5 |
| 5" | 8.8 | 16.0 | 31.0 | 39.0 | 64 | 102 |
| 6" | 11.3 | 21.2 | 39.0 | 52.0 | 75 | 157 |
| 8" | 19.9 | 34.6 | 63.0 | 90.0 | 136 | 241 |
| 10" | 29.4 | 55.3 | 104 | 132 | 232 | 470 |
| 12" | 43.7 | 78.9 | 134 | 188 | 314 | — |
| 14" | 59.4 | 107 | 166 | 235 | 443 | — |
| 16" | 77.1 | 139 | 231 | 276 | 591 | — |
| 18" | 94.8 | 177 | 293 | 391 | 795 | — |
| 20" | 123 | 223 | 376 | 493 | 1022 | — |
| 24" | 188 | 342 | 565 | 932 | 1648 | — |
Notes
- Weights are approximate catalogue values for carbon steel and are for estimation only.
- A dash means no reliable published value was available for that size and class.
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
FAQ
ASME B16.5 flange weight chart: common questions
How much does a 6 inch Class 150 weld neck flange weigh?
Approximately 11.3 kg in carbon steel. The exact weight depends on the bore schedule.
Related products, data sheets and standards
Weld Neck Flange
OEM manufacturer
View online · PDFTechnical data sheetSlip-On Flange
OEM manufacturer
View online · PDFTechnical data sheetBlind Flange
OEM manufacturer
View online · PDFASME B16.5ASME B16.5 Class 150 flange dimensions
Class 150 weld neck, slip-on, blind, socket weld, threaded and lap joint flange dimensions, NPS ½–24, in mm.
View online · PDFASME B16.5ASME B16.5 Class 300 flange dimensions
Class 300 flange outside diameter, thickness, hub and drilling dimensions, NPS ½–24, in mm.
View online · PDFOEM manufacturerIndustrial Flanges
NPS ½"–60" · CS / SS / Alloy
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