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. Manufactured in compliance with the HG/T20610-2009 standard, this gasket is designed to create a reliable, leak-tight seal in demanding service environments where standard gaskets may fail. Its robust metal-wound construction ensures long-term performance under cyclic conditions.
Key Features
D-Type configuration includes integral inner and outer containment rings
Constructed with a resilient graphite filler for superior sealing
Built to withstand extreme pressure and thermal cycling The outer ring provides handling strength and prevents over-compression
The inner ring controls gasket compression and protects against media erosion
Specifications
Gasket Type: D-Type Spiral Wound (with Inner and Outer Rings) Standard: HG/T20610-2009 Nominal Pipe Size: DN50 (approximately 2 inches) Pressure Rating: PN63 (Class 400) Construction: CRS (Carbon Steel Outer Ring) / 304 Stainless Steel (Windings) / Graphite (Filler) / 304 Stainless Steel (Inner Ring) Specific Design Code: D1222 Bore Diameter: 2.40 inches Thickness: 0.18 inches Pack Quantity: 1 unit
Applications
Sealing flanges in chemical and petrochemical processing systems High-pressure steam lines and boiler feed systems
Refinery and hydrocarbon processing equipment
Heat exchangers and pressure vessels Any application requiring a robust seal for ANSI Class 400 service
