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Spiral Wound Gasket with Inner and Centering RingsSpiral wound gasket with inner and centering rings
Spiral wound gaskets

Spiral Wound Gasket with Inner and Centering Rings

XY-SW-D

Inner ring supports the inner edge; centering ring aids alignment

This gasket consists of a spiral wound sealing element, a metal inner ring, and a centering ring. The centering ring aligns the gasket and helps limit compression. The inner ring protects the inner edge of the winding. It is suited to raised-face flange joints with demanding requirements for sealing stability and structural integrity.

  • Spiral wound sealing elementProvides compression and recovery
  • Metal inner ringSupports the inner edge and reduces inward buckling
  • Centering ringAids alignment and helps limit compression
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Features

  • The spiral wound element provides compressibility and recovery to accommodate changes in service conditions.
  • The centering ring assists alignment during installation and helps limit compression.
  • The inner ring protects the inner edge of the winding and helps reduce inward buckling.
  • Component materials can be selected to suit the medium, temperature, pressure, and flange material.
  • Available for standard flanges and nonstandard equipment connections, with construction and dimensions defined by the applicable standard or equipment drawings.

Materials & configurations

Component / ItemMaterial Options and Specification Details
Winding strip — common materialsStainless steels including 304, 316L, and 321
Winding strip — special materialsNickel-chromium-molybdenum alloy C-276 (UNS N10276); nickel-molybdenum alloy B-2 (UNS N10665); commercially pure titanium Ti Gr.1 and Ti Gr.2; duplex stainless steel UNS S32205; super duplex stainless steel UNS S32750; nickel-copper alloy 400 (UNS N04400)
Winding strip specificationGrade, strip condition, thickness, width and forming options selected for the application
FillerFlexible graphite, PTFE, mica, ceramic fiber, and other specified fillers
Inner ring — material optionsStainless steel; nickel-chromium-molybdenum alloy C-276 (UNS N10276); nickel-molybdenum alloy B-2 (UNS N10665); commercially pure titanium Ti Gr.1 and Ti Gr.2; duplex stainless steel UNS S32205; super duplex stainless steel UNS S32750; nickel-copper alloy 400 (UNS N04400)
Inner ring specificationInner ring and winding materials are selected independently, with combinations, conditions and dimensions matched to the medium and service.
Centering ringCarbon steel, stainless steel, or another specified material

Standards & supply options

  • ASME B16.20, EN 1514-2 or EN 12560-2, selected for the mating flange and rating system, with a range of sizes and material combinations.

Typical applications

  • Demanding piping flange joints in refineries and chemical plants.
  • Oil and gas transportation, processing, storage, and handling equipment.
  • Pressure vessels, heat exchangers, reactors, process columns, and associated equipment.
  • Pumps, valves, compressors, and offshore piping systems.

Selection & service notes

Suited to joints requiring both external centering and inner-edge support. Selection parameters include flange type and bore, size and rating, medium, temperature, pressure, cyclic duty and assembly load.

Dimensions & specifications

Detailed specification tables are being prepared. Include dimensions, thickness, mating flange, materials and service conditions in your enquiry.

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