Overview
The D-Type Spiral Wound Gasket with Inner and Outer Rings is a high-performance sealing solution engineered for critical flange connections in demanding process industries. Manufactured in strict compliance with the SH/T3407-2013 standard, this gasket is designed to handle extreme pressures and temperatures in piping and vessel systems. Its robust, multi-layer metal and filler construction ensures a reliable, leak-tight seal that maintains integrity under thermal cycling and variable load conditions.
Key Features
D-Type configuration with integral inner and outer containment rings Constructed with 304 stainless steel windings and a flexible graphite filler Outer ring provides compression control and prevents over-torquing
Inner ring offers radial stability and protects against media erosion Designed for nominal pipe size (DN) 65, equivalent to a 2.5-inch flange Pressure class rated for 900 pounds (900LB), suitable for high-pressure service
Resilient sealing performance across a wide temperature range
Specifications
Standard: SH/T3407-2013 Type: D (With Inner and Outer Rings) Nominal Size: DN65 (2.5 Inch) Pressure Class: 900LB Gasket Number: D2226 Winding Material: 304 Stainless Steel Filler Material: Flexible Graphite Outer Ring Material: Carbon Steel (CRS) Inner Ring Material: 304 Stainless Steel Package Quantity: 1 Unit
Applications
High-pressure chemical and petrochemical processing
Refinery and hydrocarbon pipeline flange connections
Power generation and steam system applications High-temperature heat exchanger and boiler fittings Any critical service requiring a robust, confined gasket for ANSI Class 900 flanges
