Overview
The D-Type Retaining Washer with Inner and Outer Rings is a precision-engineered metallic spiral wound gasket designed for creating reliable, high-integrity seals in demanding industrial piping and pressure vessel applications. It conforms to the HG/T20610-2009 standard, ensuring compatibility and performance in chemical, petrochemical, and power generation systems. This specific configuration is engineered for nominal pipe size DN50 and pressure class PN16 service.
Key Features
Constructed with a resilient graphite filler for superior sealing performance Features inner and outer containment rings for enhanced gasket stability and blow-out resistance
The spiral wound design compensates for flange irregularities and thermal cycling Provides a robust metal-to-metal seal suitable for a wide range of temperatures and pressures 304 stainless steel winding and rings offer excellent corrosion resistance
Specifications
Gasket Type: D-Type (Spiral Wound with Inner & Outer Rings) Standard: HG/T20610-2009 Nominal Size: DN50 Pressure Class: PN16 Winding Material: 304 Stainless Steel Filler Material: Flexible Graphite Inner Ring Material: 304 Stainless Steel Outer Ring Material: 304 Stainless Steel Construction Code: D1222
Applications
Sealing flanges in chemical processing equipment
Connections in refinery and petrochemical piping systems
Boiler and heat exchanger manways and connections High-temperature and high-pressure fluid handling systems General industrial service where a resilient, metallic gasket is required
