Spiral Wound Gasket Dimensions - Complete Reference Guide

Spiral wound gaskets are essential sealing components used in high-pressure and high-temperature piping applications across oil & gas, chemical, and power industries. These semi-metallic gaskets consist of alternating layers of metal winding strip and soft filler material, providing superior sealing performance compared to traditional gaskets.

Understanding proper gasket dimensions is critical for leak-free flange connections and system safety. All spiral wound gasket dimensions must comply with ASME B16.20 standards, which specify exact measurements for inner rings, sealing elements, and outer centering rings across different pressure classes.

The dimensional requirements vary significantly between pressure classes (150 to 2500) and flange standards (ASME B16.5 and B16.47 Series A/B). Each pressure class has specific inner diameter, outer diameter, and thickness specifications that must be matched precisely to the corresponding flange dimensions. Proper gasket selection requires careful consideration of pipe size, pressure rating, temperature conditions, and chemical compatibility. Using incorrect dimensions can result in gasket failure, system leaks, or safety hazards in critical applications. Below you'll find comprehensive dimension tables and specifications for all standard spiral wound gasket sizes, organized by pressure class and flange type to help you select the correct gasket for your specific application requirements.