20 inch ASME B16.36 Orifice Flange Dimensions
20 inch (DN 500) to ASME B16.36: OD 775 mm; Min thickness 62.0 mm; raised face 584.2 mm; hub 587 mm; length 160 mm.
Key to dimensions
- O
- Outside diameter of flange
- T
- Minimum flange thickness, excluding the raised face
- R
- Diameter of raised face
- X
- Hub diameter at base
- Y
- Length through hub
- W
- Bolt circle diameter
- Holes
- Number of bolt holes
- Bolt
- Nominal stud bolt diameter in inches
- Stud
- Stud bolt length for a raised-face orifice flange pair
20 inch ASME B16.36 Orifice Flange Dimensions — all dimensions
Class 300 orifice flange dimensions (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Outside dia — O | 775 mm | 30.51 in |
| Min thickness — T | 62.0 mm | 2.44 in |
| Raised face dia — R | 584.2 mm | 23.00 in |
| Hub dia — X | 587 mm | 23.11 in |
| Length thru hub — Y | 160 mm | 6.30 in |
| Bolt circle — W | 685.8 mm | 27.00 in |
| Number of holes | 24 | |
| Hole dia | 34.9 mm | 1.37 in |
| Bolt size | 1¼" | |
| Stud — Length | 215 mm | 8.46 in |
Class 600 orifice flange dimensions (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Outside dia — O | 815 mm | 32.09 in |
| Min thickness — T | 88.9 mm | 3.50 in |
| Raised face dia — R | 584.2 mm | 23.00 in |
| Hub dia — X | 610 mm | 24.02 in |
| Length thru hub — Y | 190 mm | 7.48 in |
| Bolt circle — W | 723.9 mm | 28.50 in |
| Number of holes | 24 | |
| Hole dia | 44.5 mm | 1.75 in |
| Bolt size | 1⅝" | |
| Stud — Length | 300 mm | 11.81 in |
Values are nominal, from ASME B16.36 Orifice Flange Dimensions. 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 — ASME B16.36 Orifice Flange Dimensions
Related for this size
20" Stud Bolt Chart for ASME B16.5 Flanges
Same size — open the dimensions page.
View online · PDFASME B16.2020" ASME B16.20 Spiral Wound Gasket Dimensions
Same size — open the dimensions page.
View online · PDFASME B16.2120" ASME B16.21 Non-Metallic Flat Gasket Dimensions
Same size — open the dimensions page.
View online · PDFASME B36.10M20" Pipe Schedule Chart — ASME B36.10M
Same size — open the dimensions page.
View online · PDFFAQ
20 inch ASME B16.36 Orifice Flange Dimensions: common questions
What are the 20 inch ASME B16.36 Orifice Flange Dimensions?
20 inch (DN 500) to ASME B16.36: OD 775 mm; Min thickness 62.0 mm; raised face 584.2 mm; hub 587 mm; length 160 mm.
Does Teshi Group manufacture 20 inch flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to ASME B16.36, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 20 inch 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 ASME B16.36 Orifice Flange Dimensions chart.
Need 20 inch 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.