1 inch ASME B16.21 Non-Metallic Flat Gasket Dimensions
1 inch (DN 25) to ASME B16.21: Inside dia 33 mm; Class 150 67 mm; Class 300 73 mm; Class 600 73 mm.
Key to dimensions
1 inch ASME B16.21 Non-Metallic Flat Gasket Dimensions — all dimensions
Flat ring gaskets for raised-face flanges (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Inside dia — ID | 33 mm | 1.30 in |
| Class 150 — OD | 67 mm | 2.64 in |
| Class 300 — OD | 73 mm | 2.87 in |
| Class 600 — OD | 73 mm | 2.87 in |
Values are nominal, from ASME B16.21 Non-Metallic Flat Gasket Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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FAQ
1 inch ASME B16.21 Non-Metallic Flat Gasket Dimensions: common questions
What are the 1 inch ASME B16.21 Non-Metallic Flat Gasket Dimensions?
1 inch (DN 25) to ASME B16.21: Inside dia 33 mm; Class 150 67 mm; Class 300 73 mm; Class 600 73 mm.
Does Teshi Group manufacture 1 inch gaskets?
Yes. Teshi Group is an OEM manufacturer in India of gaskets to ASME B16.21, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 1 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 B16.21 Non-Metallic Flat 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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