Overview
This 4-inch D-ring spiral wound gasket is engineered for reliable sealing in high-pressure, high-temperature industrial piping systems. It is specifically designed for PN16 flange connections, indicating a pressure rating of approximately 232 PSI. The gasket's robust construction utilizes corrosion-resistant 316L stainless steel for both the winding metal and the inner and outer containment rings, with a flexible graphite filler. This combination delivers a superior seal that accommodates flange rotation and surface irregularities, making it a critical component for preventing leaks in demanding process environments.
Key Features
Engineered for PN16 pressure class service, approximately 232 PSI Constructed entirely from 316L stainless steel for excellent corrosion resistance Features both inner and outer D-shaped containment rings for added stability
The inner ring prevents filler extrusion into the pipeline
The outer ring centers the gasket and improves bolt load distribution
Flexible graphite filler provides a tight seal and accommodates thermal cycling
Manufactured to meet recognized industry standards for dimensional consistency and material quality
Suitable for a wide range of temperatures and aggressive media
Specifications
Material: 316L Stainless Steel (winding and rings), Graphite (filler) Nominal Pipe Size: 4 Inch Pressure Class: PN16 Gasket Thickness: 0.18 inches Design: Spiral Wound with Inner and Outer Containment Rings (D-Ring Style) Standards: Manufactured to Comply with HG/T20610-2009 and D5525 Specifications Connection Type: Flange Package Quantity: 8 Pieces
Applications
This gasket is ideal for creating leak-tight seals in flange connections across numerous industries. Primary applications include chemical and petrochemical processing, oil and gas pipelines and refineries, power generation facilities, and industrial heating systems. It is commonly used on pumps, valves, heat exchangers, and vessel manways where sustained pressure and temperature resistance are required.
