DN 100 IS 1538 Flange Dimensions (Cast Iron Fittings)
DN 100 (4") to IS 1538: OD 220 mm; thickness 22 mm; PCD 180 mm; bolts 8; holes 19 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 100 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 | 220 mm | 8.66 in |
| Flange — C | 22 mm | 0.866 in |
| Bolt circle — K | 180 mm | 7.09 in |
| Number of bolts | 8 | |
| Hole dia — L | 19 mm | 0.748 in |
| Bolt dia | 16 |
IS 1538 Table 5 — raised flanges
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 220 mm | 8.66 in |
| Raised face — d1 | 153 mm | 6.02 in |
| Incl. raised face — C | 25 mm | 0.984 in |
| Flange — C | 22 mm | 0.866 in |
| RF height — f | 3 mm | 0.118 in |
| Bolt circle — K | 180 mm | 7.09 in |
| Number of bolts | 8 | |
| Hole dia — L | 19 mm | 0.748 in |
| Bolt dia | 16 |
IS 1538 Table 21 — double flanged 1/4 (90°) bends
| Dimension | Value | Equivalent |
|---|---|---|
| Wall thickness — e | 10.5 mm | 0.413 in |
| Bend radius — r | 155 mm | 6.10 in |
| Straight — a | 45 mm | 1.77 in |
| Centre to face — b | 200 mm | 7.87 in |
| Mass approx. — kg | 17 mm | 0.669 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 100 IS 1538 Flange Dimensions (Cast Iron Fittings): common questions
What are the DN 100 IS 1538 Flange Dimensions (Cast Iron Fittings)?
DN 100 (4") to IS 1538: OD 220 mm; thickness 22 mm; PCD 180 mm; bolts 8; holes 19 mm.
Does Teshi Group manufacture DN 100 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 100 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 100 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.