Standard Spiral Wound Gasket

Standard Spiral Wound Gasket KXT600 – R, IR, CG and CGI Types for ASME B16.20 and EN 1514-2 Flanges

Kaxite KXT600 is a standard spiral wound gasket built from a V-profile stainless steel winding alternated with a soft non-metallic filler. The four constructions below cover every common flange face from tongue-and-groove grooves to Class 2500 raised faces on petrochemical, power and process piping. Each gasket uses V-shape metallic strip produced in-house, so metal grade, filler grade and centering ring material are quoted together as a single line item.

Four constructions, one winding core

R Type · KXT600-R

Basic winding, no centering rings

Several plies of metal-only winding reinforce the inner and outer diameter for greater stability and better compression. No inner or outer centering ring is fitted.

Best for: tongue-and-groove, male-and-female and flat face to recess flanges

IR Type · KXT600-IR

Inner ring only

A solid inner metal ring acts as a compression stopper, fills the annular space between the flange bore and the gasket winding, reduces turbulent flow and prevents solids accumulation and erosion damage.

Best for: male-and-female flanges, solids-laden media

CG Type · KXT600-CG

Outer ring only

A solid outer ring locates the gasket accurately on the flange face, adds radial strength against blowout, acts as a compression limiter, and speeds installation because the outer ring touches the bolts. For Class 900 and above, an internal ring is recommended.

Best for: flat face and raised face flanges

CGI Type · KXT600-CGI

Inner and outer rings together

Both rings add compression limiting on the inner and outer side and protect the annular flange face from corrosion. Compare the ring geometries in more detail on our inner and outer ring of SWG page.

Best for: Class 900 and above, corrosive or toxic media, flat and raised face flanges

Standards and flange compatibility

Metal winding and ring materials

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Guide ring color codes follow ASME B16.20; the ring material is stencilled on the outer ring for traceability. Metal grades other than those listed are quoted on request. For special alloy combinations, see special materials spiral wound gaskets.

Filler materials and stripe colors

The filler is loaded during winding with the metal strip; the stripe color matches the filler grade. For a graphite-only supply that skips the metal winding step, compare with our graphite tape for SWG and V-shape metallic tape pages if you wind gaskets in-house.

Marking and traceability

The outer ring is stencilled with size, pressure class, winding material, filler material and the KXT manufacturer mark. Guide ring color and filler stripe color both follow ASME B16.20 so that warehouse staff and maintenance crews can verify the grade without reading the stencil.

Typical applications

• Pipe, valve, pump, heat exchanger, condensing tower, and plain or manhole flanges
• Petrochemical, chemical, mechanical manufacturing, power station, metallurgy, shipbuilding and pharmaceutical industries
• Steam, hydrocarbon, process water, solvents and mildly corrosive media
• High-temperature cyclic service where compression recovery matters

How to order and how the gaskets ship

1. Nominal pipe size or specific gasket dimensions
2. Pressure rating (Class 150 to Class 2500, or EN PN)
3. Winding metal grade and filler grade
4. Centering ring material (outer ring, inner ring, or both)

Kaxite Sealing produces KXT600 spiral wound gaskets in Ningbo, Zhejiang, with more than three decades of sealing-material experience. Bulk orders and custom non-standard sizes are quoted on request; free samples are available for qualified projects so that the winding and centering ring can be checked on a real flange before the full order. Non-circular and heat-exchanger variants are available on the non-rounded spiral wound gaskets page.

Frequently asked questions