Overview
The D-Type Spiral Wound Gasket with Inner and Outer Rings is a high-performance sealing solution engineered for critical flange connections in industrial piping and pressure vessel systems. Manufactured to the HG/T 20631-2009 standard, this gasket is designed to create a reliable, leak-tight seal in high-pressure and high-temperature applications. Its robust metal-wound construction ensures superior resilience and sealing force under variable operating conditions, making it a trusted component for maintenance, repair, and operations (MRO) professionals.
Key Features
Engineered to the HG/T 20631-2009 industry standard for dimensional consistency and performance. D-Type configuration includes integral inner and outer retaining rings for enhanced stability and installation control. Spiral wound design provides excellent spring-back and compensation for flange irregularities. Constructed with corrosion-resistant 304 stainless steel windings for durability in demanding service. Filled with flexible graphite for reliable sealing across a wide temperature range. Suitable for standard 150LB pressure class flanges, ensuring broad application compatibility.
Specifications
Gasket Type: D-Type (With Inner and Outer Rings) Standard: HG/T 20631-2009 Nominal Pipe Size: DN40 (Approximately 1.5 inches) Pressure Class: 150LB Identification Code: D2222 Construction: 304 Stainless Steel Windings / Graphite Filler / 304 Stainless Steel Rings Unit: Sold as 1 individual gasket
Applications
Sealing flanges in chemical and petrochemical processing pipelines. General service in refineries and power generation facilities. Connections on pumps, valves, heat exchangers, and vessel manways. Maintenance and overhaul of piping systems requiring a certified, reliable gasket. Ideal for services involving steam, hydrocarbons, and various process fluids.
