20A JIS B2220 30K Flange Dimensions
20A (DN 20) to JIS B2220: pipe OD 27.2 mm; OD 120 mm; thickness 18 mm; raised face 60 mm; PCD 85 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)
20A JIS B2220 30K Flange Dimensions — all dimensions
JIS B2220 30K — slip-on / blind flange dimensions (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Pipe OD — A | 27.2 mm | 1.07 in |
| Flange OD — D | 120 mm | 4.72 in |
| Flange — C | 18 mm | 0.709 in |
| Raised face — d1 | 60 mm | 2.36 in |
| Bolt circle — K | 85 mm | 3.35 in |
| Number of bolts | 4 | |
| Hole dia — L | 19 mm | 0.748 in |
| Bolt size | M16 |
Values are nominal, from JIS B2220 30K Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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20A JIS B2220 30K Flange Dimensions: common questions
What are the 20A JIS B2220 30K Flange Dimensions?
20A (DN 20) to JIS B2220: pipe OD 27.2 mm; OD 120 mm; thickness 18 mm; raised face 60 mm; PCD 85 mm.
Does Teshi Group manufacture 20A 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 20A 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 30K Flange Dimensions chart.
Need 20A 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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