20 inch ASME B16.48 Spectacle Blind Dimensions (Figure-8)
20 inch (DN 500) to ASME B16.48: Outside dia 603 mm; Inside dia 508 mm; Centre line 635 mm; Thickness 28.4 mm; Web width 121 mm.
Key to dimensions
- A
- Outside diameter of blank and ring
- B
- Inside diameter of the ring (spacer) end
- C
- Centre line distance between blank and ring
- t
- Thickness
- W
- Web (tie bar) width
20 inch ASME B16.48 Spectacle Blind Dimensions (Figure-8) — all dimensions
Spectacle blind, RF — Class 150 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Outside dia — A | 603 mm | 23.74 in |
| Inside dia — B | 508 mm | 20.00 in |
| Centre line — C | 635 mm | 25.00 in |
| Thickness — t | 28.4 mm | 1.12 in |
| Web width — W | 121 mm | 4.76 in |
Spectacle blind, RF — Class 300 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Outside dia — A | 651 mm | 25.63 in |
| Inside dia — B | 508 mm | 20.00 in |
| Centre line — C | 685 mm | 26.97 in |
| Thickness — t | 44.5 mm | 1.75 in |
| Web width — W | 121 mm | 4.76 in |
Spectacle blind, RF — Class 600 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Outside dia — A | 679 mm | 26.73 in |
| Inside dia — B | 497 mm | 19.57 in |
| Centre line — C | 725 mm | 28.54 in |
| Thickness — t | 63.5 mm | 2.50 in |
| Web width — W | 133 mm | 5.24 in |
Values are nominal, from ASME B16.48 Spectacle Blind Dimensions (Figure-8). Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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FAQ
20 inch ASME B16.48 Spectacle Blind Dimensions (Figure-8): common questions
What are the 20 inch ASME B16.48 Spectacle Blind Dimensions (Figure-8)?
20 inch (DN 500) to ASME B16.48: Outside dia 603 mm; Inside dia 508 mm; Centre line 635 mm; Thickness 28.4 mm; Web width 121 mm.
Does Teshi Group supply 20 inch products?
Yes. Teshi Group stocks and supplies products to ASME B16.48 from India, with mill test 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 B16.48 Spectacle Blind Dimensions (Figure-8) chart.
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