Overview
The D-Type Metal Winding Gasket with Inner and Outer Rings is a high-performance sealing solution engineered for critical flange connections in piping and pressure vessel systems. It conforms to the HG/T20631-2009 standard, ensuring compatibility and reliability for industrial applications. This specific configuration is designed for a 3-inch (DN80) nominal bore, 150LB pressure class flange, providing a robust metal-to-metal seal capable of withstanding challenging service conditions including high pressure, temperature extremes, and thermal cycling.
Key Features
Engineered with a resilient graphite filler wound between multiple metal layers for an exceptional seal. Features integral inner and outer containment rings for increased stability and gasket compression control. Constructed from 304 stainless steel for the winding strip and both rings, offering excellent corrosion resistance. The graphite filler provides reliable sealing across a wide temperature range and is suitable for many industrial media. Designed to prevent buckling and blow-out under high pressure and temperature fluctuations. Precise dimensional compliance ensures a proper fit and seal on standard 3-inch, 150LB flanges.
Specifications
Gasket Type: D-Type (Wound with Inner & Outer Rings) Nominal Pipe Size: 3 inch (DN80) Pressure Class: 150LB Standard: HG/T20631-2009 Material Construction: 304 Stainless Steel / Flexible Graphite / 304 Stainless Steel Inner Ring Material: 304 Stainless Steel Outer Ring Material: 304 Stainless Steel Winding Strip Material: 304 Stainless Steel Filler Material: Flexible Graphite Outside Diameter: 5.37 inches Inside Diameter: 3.19 inches Overall Thickness: 0.177 inches Quantity: 1 piece
Applications
Sealing chemical and petrochemical processing pipelines and vessels. High-pressure steam lines and power generation systems. Refinery and offshore oil & gas flange connections. Heat exchangers, pumps, and valve bonnets. Any application requiring a durable, pressure-resistant seal for ANSI/ASME B16.5 flanges.
