16 inch BS 10 Table R Flange Dimensions
16 inch (DN 400) to BS 10: OD 641 mm; PCD 584 mm; bolts 20; holes 35 mm; bolt size 32.
Key to dimensions
- D
- Outside diameter of flange
- C
- Flange thickness, excluding raised face unless stated
- K
- Bolt circle (pitch circle) diameter
- n
- Number of bolts
- L
- Bolt hole diameter
- Bolt
- Bolt size (metric M or inch diameter)
16 inch BS 10 Table R Flange Dimensions — all dimensions
BS 10 Table R — flange dimensions
| Dimension | Value | Equivalent |
|---|---|---|
| Size | 400 | |
| Flange OD — D | 641 mm | 25.24 in |
| Bolt circle — K | 584 mm | 22.99 in |
| Number of bolts | 20 | |
| Hole dia — L | 35 mm | 1.38 in |
| Bolt dia | 32 |
Values are nominal, from BS 10 Table R Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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16 inch BS 10 Table R Flange Dimensions: common questions
What are the 16 inch BS 10 Table R Flange Dimensions?
16 inch (DN 400) to BS 10: OD 641 mm; PCD 584 mm; bolts 20; holes 35 mm; bolt size 32.
Does Teshi Group manufacture 16 inch flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to BS 10, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 16 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 BS 10 Table R Flange Dimensions chart.
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Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.

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