DN 150 IS 1538 Flange Dimensions (Cast Iron Fittings)
DN 150 (6") to IS 1538: OD 285 mm; thickness 23 mm; PCD 240 mm; bolts 8; holes 23 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 150 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 | 285 mm | 11.22 in |
| Flange — C | 23 mm | 0.906 in |
| Bolt circle — K | 240 mm | 9.45 in |
| Number of bolts | 8 | |
| Hole dia — L | 23 mm | 0.906 in |
| Bolt dia | 20 |
IS 1538 Table 5 — raised flanges
| Dimension | Value | Equivalent |
|---|---|---|
| Flange OD — D | 285 mm | 11.22 in |
| Raised face — d1 | 209 mm | 8.23 in |
| Incl. raised face — C | 26.0 mm | 1.02 in |
| Flange — C | 23 mm | 0.906 in |
| RF height — f | 3 mm | 0.118 in |
| Bolt circle — K | 240 mm | 9.45 in |
| Number of bolts | 8 | |
| Hole dia — L | 23 mm | 0.906 in |
| Bolt dia | 20 |
IS 1538 Table 21 — double flanged 1/4 (90°) bends
| Dimension | Value | Equivalent |
|---|---|---|
| Wall thickness — e | 11.7 mm | 0.461 in |
| Bend radius — r | 200 mm | 7.87 in |
| Straight — a | 50 mm | 1.97 in |
| Centre to face — b | 250 mm | 9.84 in |
| Mass approx. — kg | 31 mm | 1.22 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.
Find another size or standard
Pick a product, standard and size — or just type — to see every dimension and download a watermarked PDF for that one size.
Other sizes — IS 1538 Flange Dimensions (Cast Iron Fittings)
Related for this size
6" Stud Bolt Chart for ASME B16.5 Flanges
Same size — open the dimensions page.
View online · PDFASME B16.206" ASME B16.20 Spiral Wound Gasket Dimensions
Same size — open the dimensions page.
View online · PDFASME B16.216" ASME B16.21 Non-Metallic Flat Gasket Dimensions
Same size — open the dimensions page.
View online · PDFASME B36.10M6" Pipe Schedule Chart — ASME B36.10M
Same size — open the dimensions page.
View online · PDFFAQ
DN 150 IS 1538 Flange Dimensions (Cast Iron Fittings): common questions
What are the DN 150 IS 1538 Flange Dimensions (Cast Iron Fittings)?
DN 150 (6") to IS 1538: OD 285 mm; thickness 23 mm; PCD 240 mm; bolts 8; holes 23 mm.
Does Teshi Group manufacture DN 150 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 150 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 150 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.