Flexitallic FS-18-150-316L-ANSI-B16.20 Spiral Gasket

Flexitallic FS-18-150-316L-ANSI-B16.20 Spiral Gasket is an 18-inch, Class 150 gasket made from 316L stainless steel, designed to seal flange joints that conform to ANSI/ASME B16.20 standards. The FS-18-150-316L-ANSI-B16.20 designation identifies the nominal size (18 in), the pressure class (150), the material grade (316L stainless steel), and the applicable flange standard (ANSI-B16.20), ensuring proper mating with corresponding flanges. Constructed from 316L stainless steel, this gasket provides corrosion resistance characteristic of that alloy and supports service in piping systems where stainless steel is desired. It is intended for use on flanged connections that follow ANSI B16.20 interfaces, offering a gasket solution for 18-inch lines rated at Class 150 pressures. The spiral gasket configuration—consistent with Flexitallic’s approach to gasket technology—pairs metallic elements with a sealing interface to accommodate flange seating and bolt load, while maintaining compatibility with standard flange faces defined by the ANSI B16.20 specification. That combination makes it suitable for applications where a stainless steel gasket is preferred for 18-inch flange assemblies, aligning with industry standards and simplifying replacement in retrofit projects. Proper installation requires matching flange faces and seating widths per ANSI B16.20 to ensure a proper seal.