Spiral Wound Gasket Types: R, IR, CG & CGI

Why does ring selection matter?

The outer ring locates the gasket in a matching flange arrangement. The inner ring occupies the bore-side area of the assembly and forms part of the specified construction. Neither ring should be added, omitted or changed solely because a replacement has a similar appearance.

The relevant questions are whether the gasket fits the flange seating geometry, whether the bore has the required clearance and whether each metal and filler is suitable for the process. Check these points against the equipment or piping specification.

What belongs in the gasket description?

• Flange standard and required edition.
• Nominal size and pressure class or complete dimensions.
• R, IR, CG or CGI construction, confirmed by drawing where needed.
• Winding metal, filler and each ring material.
• Quantity, marking and required inspection documents.

The spiral wound gasket product page lists the construction choices. The gasket measurement guide explains which dimensions need separate labels.

Can CG be replaced with CGI?

Treat the change as a specification review, not an automatic upgrade. Adding an inner ring changes the assembly and bore-side geometry. The flange design and applicable material specification determine whether the alternative is acceptable.

Similarly, a basic winding without a centering ring needs the specified joint geometry and positioning. Do not transfer a basic-style gasket into another flange arrangement based only on nominal diameter. If the original part cannot be identified, send the flange drawing rather than making the style decision from a photograph.

How should material and documents be checked?

A short description such as stainless steel/graphite leaves important fields unresolved. Identify the metal grade for winding and rings, then specify the filler. Color markings can assist identification but should be checked against the supplier’s documented marking system.

Ask for the documents required by the order: material identification, dimensional checks and any agreed product testing. A dimensional standard reference does not establish a supplier’s certification. Use the RFQ checklist to keep those requests attached to the correct item.

Technical basis

The product construction terminology follows Kaxite’s KXT-600 catalog and the gasket-design framework used in ASME B16.20. This guide explains ordering distinctions; it does not reproduce the standard or establish application limits. Use the project-specified edition and approved drawing for acceptance.

Product information

Review the product construction and ordering details before submitting a quotation request.