Spiral Wound Gasket ASME B16.20 Ss316/Graphite with CS Outer Ring Material Gaskets. ASME B16.20 Standard: Complies with ASME B16.20 standards for spiral wound gaskets. SS316/Graphite Material: Constructed with SS316 inner ring and graphite filler for durability. CS Outer Ring: Features a carbon steel outer ring for enhanced structural support. Multi-Application Use: Suitable for pumps, compressors, valves, and piping in oil industries. Multiple Certification: Certified with RoHS, UR, ISO, and CE for global compliance. Flexible Thickness: Available in 3.2mm and 4.5mm thickness options based on form. Various Flange Types: Compatible with Flat Face (F.F) and Raised Face (R.F) flanges. Customizable Options: Customized gasket standards, types, and ring materials available.