The 304 inner and outer ring spiral wound gasket is a semi-metallic sealing gasket widely used in industrial applications. It consists of a V-shaped or W-shaped stainless steel (SS304) strip and a flexible filler material (such as graphite) wound together spirally, with inner and outer metal centering rings (both made of SS304) for positioning and controlling compression‌Key features: ‌Material‌: SS304 metal strip + graphite filler, with SS304 inner/outer rings‌ ‌Pressure rating‌: Up to 26MPa‌ ‌Temperature range‌: -196°C to 650°C‌ ‌Applications‌: Suitable for flanged connections in pipelines, valves, pumps, and heat exchectors, especially in environments with pressure fluctuations, vibrations, or thermal cycling‌ ‌Standards‌: Complies with ASME B16.20, HG/T 20631, and SH/T 3407 standards‌ The outer ring (OR) and inner ring (IR) help maintain alignment and prevent over-compression during installation‌