Overview
This 304 Stainless Steel Flanged Spiral Wound Gasket is a precision-engineered sealing solution designed for critical service in large-diameter, high-pressure industrial piping systems. It is manufactured to the exacting requirements of the HG/T20631-2009 standard, ensuring compatibility and performance in demanding petrochemical, power generation, and heavy industrial applications. The gasket is specifically dimensioned for a DN1250 (approximately 49-inch nominal bore) flange connection with a 150LB pressure class, providing a reliable seal against media, pressure, and thermal fluctuations.
Key Features
Robust 304 stainless steel construction for excellent corrosion resistance
Spiral wound design with flexible graphite filler for superior sealing and recovery Integrated 304 stainless steel inner and outer rings for enhanced gasket stability and handling
Engineered to withstand thermal cycling and system vibration Conforms to industry-standard dimensions for guaranteed flange fit and performance Suitable for service pressures up to 285 PSI at rated temperature
Specifications
Material: 304 Stainless Steel (winding strip and inner/outer rings) with Graphite Filler Size: DN1250 (Nominal Pipe Size approximately 49 inches) Pressure Rating: 150LB (Class 150) Standards: HG/T20631-2009 Connection Type: Flanged Precise Dimensions (Approximate): Inside Diameter 5.2 inches, Outside Diameter 7.7 inches Precise Dimensions (Approximate): Inner Ring ID 6.1 inches, Inner Ring OD 7.0 inches Gasket Thickness: 0.18 inches Configuration: Style D with Inner and Outer Rings (D2222) Unit Quantity: 1 piece per pack
Applications
Primary sealing for large-diameter process piping in chemical and petrochemical plants Flange connections on boilers, heat exchangers, and pressure vessels in power generation
Critical service lines in oil and gas refining and transmission General industrial piping systems requiring a resilient, metallic gasket for Class 150 service
