DN 400 IS 1538 Flange Dimensions (Cast Iron Fittings)
DN 400 (16") to IS 1538: OD 565 mm; thickness 30 mm; PCD 515 mm; bolts 16; holes 28 mm.
Key to dimensions
- D
- Outside diameter of flange
- C
- Flange thickness, excluding raised face unless stated
- d1
- Raised face diameter
- f
- Raised face height
- K
- Bolt circle (pitch circle) diameter
- n
- Number of bolts
- L
- Bolt hole diameter
- Bolt
- Bolt size (metric M or inch diameter)
DN 400 IS 1538 Flange Dimensions (Cast Iron Fittings) — all dimensions
IS 1538 Tables 4 & 6 — flanges of pipes and fittings: dimensions and standard drilling
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 565 mm | 22.24 in |
| Flange — C | 30 mm | 1.18 in |
| Bolt circle — K | 515 mm | 20.28 in |
| Number of bolts | 16 | |
| Hole dia — L | 28 mm | 1.10 in |
| Bolt dia | 24 |
IS 1538 Table 5 — raised flanges
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 565 mm | 22.24 in |
| Raised face — d1 | 477 mm | 18.78 in |
| Incl. raised face — C | 34 mm | 1.34 in |
| Flange — C | 30 mm | 1.18 in |
| RF height — f | 4 mm | 0.157 in |
| Bolt circle — K | 515 mm | 20.28 in |
| Number of bolts | 16 | |
| Hole dia — L | 28 mm | 1.10 in |
| Bolt dia | 24 |
IS 1538 Table 21 — double flanged 1/4 (90°) bends
| Dimension | Value | Equivalent |
|---|---|---|
| Wall thickness — e | 17.5 mm | 0.689 in |
| Bend radius — r | 425 mm | 16.73 in |
| Straight — a | 75 mm | 2.95 in |
| Centre to face — b | 500 mm | 19.69 in |
Values are nominal, from IS 1538 Flange Dimensions (Cast Iron Fittings). Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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Other sizes — IS 1538 Flange Dimensions (Cast Iron Fittings)
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DN 400 IS 1538 Flange Dimensions (Cast Iron Fittings): common questions
What are the DN 400 IS 1538 Flange Dimensions (Cast Iron Fittings)?
DN 400 (16") to IS 1538: OD 565 mm; thickness 30 mm; PCD 515 mm; bolts 16; holes 28 mm.
Does Teshi Group manufacture DN 400 flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to IS 1538, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the DN 400 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 IS 1538 Flange Dimensions (Cast Iron Fittings) chart.
Need DN 400 flanges?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.