HG Standard Spiral Wound Gasket, 316L Metal & Graphite, 18" 900LB
Overview
This 18-inch nominal pipe size, 900LB pressure class spiral wound gasket is engineered for critical sealing applications in high-pressure, high-temperature industrial systems. Manufactured in strict compliance with the HG/T 20631-2009 standard, it is designed for use on raised face and flat face flanges. The gasket's robust construction combines the strength of 316L stainless steel with the superior sealing properties of a flexible graphite filler, delivering reliable performance and long service life in demanding environments.
Key Features
Engineered to the HG/T 20631-2009 industry standard for dimensional consistency and performance. Core winding is constructed from corrosion-resistant 316L stainless steel for durability. Flexible graphite filler provides excellent conformability and a tight seal under compression. Suitable for a broad spectrum of operating temperatures and pressures. Designed for both indoor and outdoor installation in industrial settings. The outer ring provides gasket centering and prevents over-compression during flange bolt-up.
Specifications
Standard: HG Nominal Size: 18 inches Pressure Class: 900LB Construction: Spiral Wound Metal Windings: 316L Stainless Steel Filler Material: Flexible Graphite Outer Ring Material: 316L Stainless Steel Indoor/Outdoor Use: Both Paintable: No Pack Size: 1 unit
Applications
This gasket is specified for sealing flanged connections in piping systems and pressure vessels across numerous industries. Primary applications include chemical and petrochemical processing, oil and gas pipelines, power generation facilities, and refinery operations. It is ideal for sealing services involving steam, hydrocarbons, and various process fluids where a resilient, high-integrity seal is required to prevent leaks and ensure system safety.
