40A JIS B2220 20K Flange Dimensions
40A (DN 40) to JIS B2220: pipe OD 48.6 mm; OD 140 mm; thickness 18 mm; raised face 81 mm; PCD 105 mm.
Key to dimensions
- D
- Outside diameter of flange
- A
- Pipe outside diameter (hub diameter at the weld end)
- C
- Flange thickness, excluding raised face unless stated
- d1
- Raised face diameter
- K
- Bolt circle (pitch circle) diameter
- n
- Number of bolts
- L
- Bolt hole diameter
- Bolt
- Bolt size (metric M or inch diameter)
40A JIS B2220 20K Flange Dimensions — all dimensions
JIS B2220 20K — slip-on / blind flange dimensions (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Pipe OD — A | 48.6 mm | 1.91 in |
| Flange OD — D | 140 mm | 5.51 in |
| Flange — C | 18 mm | 0.709 in |
| Raised face — d1 | 81 mm | 3.19 in |
| Bolt circle — K | 105 mm | 4.13 in |
| Number of bolts | 4 | |
| Hole dia — L | 19 mm | 0.748 in |
| Bolt size | M16 |
Values are nominal, from JIS B2220 20K Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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40A JIS B2220 20K Flange Dimensions: common questions
What are the 40A JIS B2220 20K Flange Dimensions?
40A (DN 40) to JIS B2220: pipe OD 48.6 mm; OD 140 mm; thickness 18 mm; raised face 81 mm; PCD 105 mm.
Does Teshi Group manufacture 40A flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to JIS B2220, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 40A 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 JIS B2220 20K Flange Dimensions chart.
Need 40A 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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