This 3-inch Spiral Wound Gasket is a heavy-duty metallic sealing solution engineered for critical piping applications. It features alternating layers of pre-formed 316L stainless steel strip and flexible graphite filler material, spiral-wound and spot-welded for structural integrity. The solid 316L stainless steel inner ring reduces bore turbulence, prevents filler blowout, and acts as a compression limiter — making it suitable for the most demanding process conditions. The carbon steel outer centering ring ensures precise bolt-hole alignment and serves as a compression stop during installation. With dual pressure class compatibility (Class 300 and Class 600), this gasket offers versatile use across a wide range of piping systems. The yellow color-coded outer ring conforms to industry standard color identification for quick visual verification on-site. Suitable for use with: Steam, water, oil, gas, hydrocarbons, acids, and other industrial process fluids.