Overview
This D-type metal wound gasket is engineered for critical sealing applications in high-pressure, high-temperature piping systems. Manufactured in strict compliance with the HG/T 20631-2009 standard, it is designed for 5-inch (DN125) stainless steel flanges with a 900LB pressure class rating. The gasket's robust construction combines the strength of metal with the sealing resilience of graphite, creating a reliable barrier capable of handling significant thermal expansion, pressure fluctuations, and mechanical stress in demanding industrial processes.
Key Features
D-type design with integral inner and outer retaining rings for enhanced stability and installation alignment Winding core of 304 stainless steel provides structural integrity and spring-like recovery Flexible graphite filler offers superior conformability and an effective gas-tight seal Specifically rated for 900LB pressure class service in demanding applications Retaining rings prevent over-compression and protect the winding from blow-out Suitable for systems with thermal cycling and vibration
Specifications
Standard: HG/T 20631-2009 Gasket Type: D-type with Inner and Outer Rings Nominal Pipe Size: 5 inches (DN125) Pressure Class: 900LB Winding Material: 304 Stainless Steel Filler Material: Flexible Graphite Retaining Ring Material: 304 Stainless Steel Recommended Pipe Material: Stainless Steel Pack Quantity: 6 gaskets
Applications
High-pressure steam lines and boiler feed systems Chemical and petrochemical processing pipelines Refinery and hydrocarbon processing units Power generation plant piping Industrial heating systems and heat exchangers Any ANSI Class 900 flange connection requiring a resilient, metallic seal
