DN 850 ASME B16.47 Large Diameter Plate & Blind Flange Dimensions
DN 850 (34") to ASME B16.47: OD 1110 mm; PCD 1028.7 mm; bolts 32; holes 41.3 mm; raised face 965 mm.
Key to dimensions
- D
- Outside diameter of flange
- B
- Bore (inside diameter) of plate flange
- C
- Flange thickness — plate or blind, raised face (RF) or flat face (FF)
- K
- Bolt circle (pitch circle) diameter
- n
- Number of bolt holes
- L
- Bolt hole diameter
- d1
- Raised face diameter
- f
- Raised face height
DN 850 ASME B16.47 Large Diameter Plate & Blind Flange Dimensions — all dimensions
ASME B16.47 Series A Class 150 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 1110 mm | 43.70 in |
| Bolt circle — K | 1028.7 mm | 40.50 in |
| Number of bolts | 32 | |
| Hole dia — L | 41.3 mm | 1.63 in |
| Raised face — d1 | 965 mm | 37.99 in |
| RF height — f | 2 mm | 0.079 in |
| Bore — B | 866.6 mm | 34.12 in |
| Plate, RF — C | 81 mm | 3.19 in |
| Plate, FF — C | 79 mm | 3.11 in |
| Blind, RF — C | 81 mm | 3.19 in |
| Blind, FF — C | 79 mm | 3.11 in |
ASME B16.47 Series A Class 300 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 1205 mm | 47.44 in |
| Bolt circle — K | 1104.9 mm | 43.50 in |
| Number of bolts | 28 | |
| Hole dia — L | 50.8 mm | 2.00 in |
| Raised face — d1 | 965 mm | 37.99 in |
| RF height — f | 2 mm | 0.079 in |
| Bore — B | 866.6 mm | 34.12 in |
| Plate, RF — C | 100.1 mm | 3.94 in |
| Plate, FF — C | 98.1 mm | 3.86 in |
| Blind, RF — C | 103.2 mm | 4.06 in |
| Blind, FF — C | 101.2 mm | 3.98 in |
ASME B16.47 Series B Class 150 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 1005 mm | 39.57 in |
| Bolt circle — K | 957.3 mm | 37.69 in |
| Number of bolts | 40 | |
| Hole dia — L | 25.4 mm | 1.00 in |
| Raised face — d1 | 921 mm | 36.26 in |
| RF height — f | 2 mm | 0.079 in |
| Bore — B | 866.6 mm | 34.12 in |
| Plate, RF — C | 47.7 mm | 1.88 in |
| Plate, FF — C | 45.7 mm | 1.80 in |
| Blind, RF — C | 55.7 mm | 2.19 in |
| Blind, FF — C | 53.7 mm | 2.11 in |
ASME B16.47 Series B Class 300 — plate and blind flange (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 1110 mm | 43.70 in |
| Bolt circle — K | 1031.9 mm | 40.63 in |
| Number of bolts | 36 | |
| Hole dia — L | 41.3 mm | 1.63 in |
| Raised face — d1 | 953 mm | 37.52 in |
| RF height — f | 2 mm | 0.079 in |
| Bore — B | 871.5 mm | 34.31 in |
| Plate, RF — C | 101.6 mm | 4.00 in |
| Plate, FF — C | 99.6 mm | 3.92 in |
| Blind, RF — C | 101.6 mm | 4.00 in |
| Blind, FF — C | 99.6 mm | 3.92 in |
Values are nominal, from ASME B16.47 Large Diameter Plate & Blind Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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FAQ
DN 850 ASME B16.47 Large Diameter Plate & Blind Flange Dimensions: common questions
What are the DN 850 ASME B16.47 Large Diameter Plate & Blind Flange Dimensions?
DN 850 (34") to ASME B16.47: OD 1110 mm; PCD 1028.7 mm; bolts 32; holes 41.3 mm; raised face 965 mm.
Does Teshi Group manufacture DN 850 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 DN 850 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 Large Diameter Plate & Blind Flange Dimensions chart.
Need DN 850 flanges?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
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