Overview
The B-Type Metallic Spiral Wound Gasket with Inner Ring is engineered for creating high-integrity, leak-tight seals in demanding industrial piping and pressure vessel systems. This specific configuration, designated as DN20 and rated for 600LB pressure class, is manufactured in strict compliance with the HG/T 20631-2009 standard, ensuring dimensional accuracy and reliable performance in critical applications. The construction utilizes a resilient graphite filler wound between layers of stainless steel, reinforced with solid inner and outer rings, to provide superior sealing under variable pressures and temperatures.
Key Features
Robust triple-layer construction with 304 stainless steel inner and outer rings Flexible graphite filler provides excellent conformability and seal Designed specifically for 600LB pressure class flange connections Conforms to HG/T 20631-2009 for assured dimensional interchangeability Exceptional resistance to heat, corrosion, and compression set Ideal for sealing on raised face flanges
Specifications
Material (Windings & Rings): Stainless Steel 304 Filler Material: Flexible Graphite Size: DN20 (Nominal Bore approximately 3/4 inch) Pressure Rating: 600LB Standard: HG/T 20631-2009 Style: B-Type (with Inner and Outer Rings) Connection Type: Flange Gasket Package Quantity: 100 units
Applications
High-pressure process piping in chemical and petrochemical plants Refinery and offshore oil & gas pipeline connections Power generation and steam system flanges Industrial heating and boiler feed systems Any application requiring a certified, high-pressure metallic gasket for ANSI standard flanges
