34 inch ASME B16.47 Series B Flange Dimensions
34 inch (DN 850) to ASME B16.47: OD 1005 mm; thickness 47.7 mm; hub 892 mm; pipe OD 865.1 mm; length 109 mm.
Key to dimensions
- O
- Outside diameter of flange
- tf
- Minimum thickness of weld neck and of blind flange, excluding the raised face
- X
- Hub diameter at base
- A
- Hub diameter at the welding end
- Y
- Length through hub, excluding the raised face
- R
- Diameter of raised face
- W
- Bolt circle diameter
- Holes
- Number and diameter of bolt holes
34 inch ASME B16.47 Series B Flange Dimensions — all dimensions
Series B Class 150 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 850 | |
| Outside dia — O | 1005 mm | 39.57 in |
| Weld neck — tf | 47.7 mm | 1.88 in |
| Blind — tf | 55.7 mm | 2.19 in |
| Hub dia — X | 892 mm | 35.12 in |
| Hub at weld — A | 865.1 mm | 34.06 in |
| Length thru hub — Y | 109 mm | 4.29 in |
| Raised face dia — R | 921 mm | 36.26 in |
| Bolt circle — W | 957.3 mm | 37.69 in |
| Number of holes | 40 | |
| Hole dia | 25.4 mm | 1.00 in |
| Bolt size | ⅞" |
Series B Class 300 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 850 | |
| Outside dia — O | 1110 mm | 43.70 in |
| Weld neck — tf | 101.6 mm | 4.00 in |
| Blind — tf | 101.6 mm | 4.00 in |
| Hub dia — X | 918 mm | 36.14 in |
| Hub at weld — A | 870.0 mm | 34.25 in |
| Length thru hub — Y | 171 mm | 6.73 in |
| Raised face dia — R | 953 mm | 37.52 in |
| Bolt circle — W | 1031.9 mm | 40.63 in |
| Number of holes | 36 | |
| Hole dia | 41.3 mm | 1.63 in |
| Bolt size | 1½" |
Values are nominal, from ASME B16.47 Series B Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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FAQ
34 inch ASME B16.47 Series B Flange Dimensions: common questions
What are the 34 inch ASME B16.47 Series B Flange Dimensions?
34 inch (DN 850) to ASME B16.47: OD 1005 mm; thickness 47.7 mm; hub 892 mm; pipe OD 865.1 mm; length 109 mm.
Does Teshi Group manufacture 34 inch flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to ASME B16.47, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 34 inch dimensions as a PDF?
Yes. Use “Download PDF for this size” on this page to get a single-size, print-ready PDF with the drawing and every tabulated dimension, or download the full ASME B16.47 Series B Flange Dimensions chart.
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