Overview
The D-Type Spiral Wound Gasket with Inner and Outer Rings is engineered for high-pressure, high-temperature sealing in critical industrial piping and vessel flanges. This gasket conforms to the HG/T20610-2009 standard, ensuring dimensional interchangeability and performance reliability for nominal pipe size 2 inches (DN50) and pressure class 300 (PN40). Its robust metal-and-filler construction creates a resilient seal capable of withstanding system fluctuations, thermal cycling, and demanding service conditions.
Key Features
D-Type design incorporates integral inner and outer containment rings for enhanced stability Constructed with a 304 stainless steel winding strip for general corrosion resistance Features a 316L stainless steel inner ring and outer ring for improved pitting resistance
Graphite filler provides excellent thermal conductivity and seal resilience across a wide temperature range Engineered for Pressure Class 300 (PN40) applications, suitable for high-pressure services Manufactured to industry standard HG/T20610-2009 for assured quality and fit
Specifications
Gasket Type: D-Type Spiral Wound with Inner and Outer Rings Nominal Size: DN50 (2 inches) Pressure Rating: PN40 (Class 300) Construction: 304 Stainless Steel Windings / Graphite Filler / 316L Stainless Steel Rings Windings Material: Stainless Steel 304 Inner Ring Material: Stainless Steel 316L Outer Ring Material: Stainless Steel 316L Filler Material: Flexible Graphite Standard: HG/T20610-2009 Pack Quantity: 1 unit
Applications
Sealing flanges in chemical and petrochemical processing systems High-pressure steam lines and power generation utilities
Refinery and hydrocarbon processing equipment Heat exchangers, reactors, and pressure vessels Any application requiring a reliable, resilient seal for ANSI Class 300 flanged connections
