Gasket Dimension Charts
ASME B16.20 & B16.21 — Spiral Wound, Ring Joint & Non-Metallic Gaskets
About
This section provides gasket dimension charts for three gasket types commonly used with ASME flanges. Gasket selection depends on the flange facing type, pressure class, and service conditions.
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Gasket Types
- Spiral Wound Gaskets (ASME B16.20) — gasket OD, ID, and centering ring OD by flange size and pressure class for ASME B16.5 flanges
- Ring Joint Gaskets (ASME B16.20) — ring specifications including pitch diameter, width, height (oval and octagonal), and flat width by ring number
- Non-Metallic Flat Gaskets (ASME B16.21) — gasket OD and ID for flat ring and full face gaskets by NPS and pressure class