18 inch BS 10 Table H Flange Dimensions
18 inch (DN 450) to BS 10: OD 26 1/2 in; thickness 1 7/8 in; PCD 24 in; bolts 20; holes 1 1/4 in.
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)
18 inch BS 10 Table H Flange Dimensions — all dimensions
BS 10 Table H — flange dimensions
| Dimension | Value | Equivalent |
|---|---|---|
| Size | 450 | |
| Flange OD — D | 26 1/2 in | 673.1 mm |
| Flange OD — D | 673 mm | 26.50 in |
| Steel, heavy series — C | 1 7/8 in | 47.6 mm |
| Steel, heavy series — C | 48 mm | 1.89 in |
| Steel, light series — C | 2 3/8 in | 60.3 mm |
| Cast iron — C | 2 1/8 in | 54.0 mm |
| Bolt circle — K | 24 in | 609.6 mm |
| Bolt circle — K | 610 mm | 24.02 in |
| Number of bolts | 20 | |
| Hole dia — L | 1 1/4 in | 31.8 mm |
| Hole dia — L | 32 mm | 1.26 in |
| Bolt size | 1 1/8 |
Values are nominal, from BS 10 Table H Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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18 inch BS 10 Table H Flange Dimensions: common questions
What are the 18 inch BS 10 Table H Flange Dimensions?
18 inch (DN 450) to BS 10: OD 26 1/2 in; thickness 1 7/8 in; PCD 24 in; bolts 20; holes 1 1/4 in.
Does Teshi Group manufacture 18 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 18 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 H Flange Dimensions chart.
Need 18 inch 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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