1 1/2 inch ASME B16.20 Spiral Wound Gasket Dimensions
1 1/2 inch (DN 40) to ASME B16.20: Class 150 54.1 mm; Class 300 54.1 mm; Class 600 54.1 mm; Class 900 47.8 mm; Class 1500 47.8 mm.
Key to dimensions
1 1/2 inch ASME B16.20 Spiral Wound Gasket Dimensions — all dimensions
Sealing element inside diameter (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 40 | |
| Class 150 | 54.1 mm | 2.13 in |
| Class 300 | 54.1 mm | 2.13 in |
| Class 600 | 54.1 mm | 2.13 in |
| Class 900 | 47.8 mm | 1.88 in |
| Class 1500 | 47.8 mm | 1.88 in |
| Class 2500 | 47.8 mm | 1.88 in |
Sealing element outside diameter (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 40 | |
| Class 150–600 | 69.9 mm | 2.75 in |
| Class 900–2500 | 69.9 mm | 2.75 in |
Centering ring outside diameter (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 40 | |
| Class 150 | 85.9 mm | 3.38 in |
| Class 300 | 95.3 mm | 3.75 in |
| Class 600 | 95.3 mm | 3.75 in |
| Class 900 | 98.6 mm | 3.88 in |
| Class 1500 | 98.6 mm | 3.88 in |
| Class 2500 | 117.6 mm | 4.63 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
1 1/2 inch ASME B16.20 Spiral Wound Gasket Dimensions: common questions
What are the 1 1/2 inch ASME B16.20 Spiral Wound Gasket Dimensions?
1 1/2 inch (DN 40) to ASME B16.20: Class 150 54.1 mm; Class 300 54.1 mm; Class 600 54.1 mm; Class 900 47.8 mm; Class 1500 47.8 mm.
Does Teshi Group manufacture 1 1/2 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 1 1/2 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.
Need 1 1/2 inch gaskets?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
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