Overview
This industrial-grade spiral wound gasket is engineered for high-integrity sealing in critical piping and pressure vessel applications. Manufactured in strict compliance with the HG/T20631-2009 standard, it is designed for nominal pipe sizes of 20 inches (DN500) at a 600-pound pressure class. The gasket features a robust C-shaped construction with an integral outer centering ring, ensuring precise alignment during flange assembly and preventing over-compression of the sealing element. Its combination of durable metallic windings and a resilient filler provides a reliable, leak-tight seal capable of withstanding significant thermal cycling and mechanical stress.
Key Features
Constructed to the exacting HG/T20631-2009 industry standard Features a solid 316L stainless steel outer ring for easy alignment and gasket protection Spiral winding core combines 316L stainless steel with flexible graphite filler
Provides excellent thermal stability across a wide temperature range
Offers strong chemical resistance suitable for various media
Suitable for both indoor and outdoor service applications The C5520 material designation ensures a specific, high-performance construction
Specifications
Standard: HG Nominal Size: 20 inches Pressure Class: 600LB Construction: Spiral Wound with Outer Ring (C-Type) Winding Material: 316L Stainless Steel Filler Material: Flexible Graphite Outer Ring Material: 316L Stainless Steel Chemical Base: Graphite Sealant Type: Spiral Wound Gasket Indoor/Outdoor Use: Both Paintable: No Unit: Sold as a single gasket
Applications
Ideal for sealing flanged connections in chemical and petrochemical processing Suitable for high-pressure and high-temperature steam lines Used in power generation and oil & gas transmission systems
Applicable in refinery and industrial plant piping requiring HG standard components Effective for heat exchangers, valves, and pump connections
