4 inch ASME B16.20 Spiral Wound Gasket Dimensions
4 inch (DN 100) to ASME B16.20: Class 150 127.0 mm; Class 300 127.0 mm; Class 600 120.7 mm; Class 900 120.7 mm; Class 1500 117.6 mm.
Key to dimensions
4 inch ASME B16.20 Spiral Wound Gasket Dimensions — all dimensions
Sealing element inside diameter (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 100 | |
| Class 150 | 127.0 mm | 5.00 in |
| Class 300 | 127.0 mm | 5.00 in |
| Class 600 | 120.7 mm | 4.75 in |
| Class 900 | 120.7 mm | 4.75 in |
| Class 1500 | 117.6 mm | 4.63 in |
| Class 2500 | 117.6 mm | 4.63 in |
Sealing element outside diameter (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 100 | |
| Class 150–600 | 149.4 mm | 5.88 in |
| Class 900–2500 | 149.4 mm | 5.88 in |
Centering ring outside diameter (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 100 | |
| Class 150 | 174.8 mm | 6.88 in |
| Class 300 | 181.1 mm | 7.13 in |
| Class 600 | 193.8 mm | 7.63 in |
| Class 900 | 206.5 mm | 8.13 in |
| Class 1500 | 209.6 mm | 8.25 in |
| Class 2500 | 235.0 mm | 9.25 in |
Values are nominal, from ASME B16.20 Spiral Wound Gasket Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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FAQ
4 inch ASME B16.20 Spiral Wound Gasket Dimensions: common questions
What are the 4 inch ASME B16.20 Spiral Wound Gasket Dimensions?
4 inch (DN 100) to ASME B16.20: Class 150 127.0 mm; Class 300 127.0 mm; Class 600 120.7 mm; Class 900 120.7 mm; Class 1500 117.6 mm.
Does Teshi Group manufacture 4 inch gaskets?
Yes. Teshi Group is an OEM manufacturer in India of gaskets to ASME B16.20, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 4 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 B16.20 Spiral Wound Gasket Dimensions chart.
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Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
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