Kammprofile Gasket with Integral Outer Ring

Kaxite KXT-1130 is built on a concentrically serrated solid metal core with the centering ring machined into the core itself. A soft sealing layer — graphite or PTFE — is bonded to both facing surfaces. The serrated geometry concentrates seating stress on the sealing faces, developing a reliable seal at bolt loads lower than those required by solid metal gaskets, while the integral outer ring fixes the gasket position within the flange bolt circle during installation.

KXT-1130 Specifications, Sizes and Supplier Quote

The data below covers the standard KXT-1130 configuration. Non-standard core alloys, facings, thicknesses and diameters are quoted to drawing; include the flange standard and class in the enquiry for an accurate price and lead time.

Core Alloy and Facing Selection — Temperature and Chemical Envelope

Two independent selections define the KXT-1130 envelope: the core alloy sets the temperature ceiling and mechanical strength, the facing material sets chemical compatibility and seating behaviour. The standard pairing — SS 316L core with flexible graphite facing — covers the broadest range of steam, hydrocarbon and high-temperature service. PTFE facing is specified where graphite is not chemically acceptable, at a lower temperature ceiling.

Cross-section: serrated core with integral centering ring and facing on both sealing surfaces.

Integral Outer Ring vs Loose Outer Ring vs Basic Style — Selection Table

Kammprofile gaskets are supplied in three configurations. The integral ring is the standard recommendation for raised-face and flat-face flanges where self-contained centering is preferred; the loose ring is specified where radial thermal movement is a design consideration; the basic style is reserved for tongue-and-groove and male-female flanges where the flange geometry itself centers the gasket. The table below compares the three against the selection criteria most often raised in procurement enquiries.

If the duty is better served by a loose-ring configuration, the Kammprofile gasket with loose outer ring is the correct specification. For an overview of how the Kammprofile family compares with other semi-metallic and sheet gasket types, the industrial gasket range provides a comparative starting point.

Heat Exchanger, High-Pressure Piping and Vessel Applications

The integral-ring Kammprofile gasket is specified across the high-pressure and high-temperature segments of process plants. The dominant application is heat exchanger flange joints — shell cover, channel box, floating head and tubesheet-to-channel connections — where limited bolt load, thermal cycling and the need for a reliable hydrotest-to-operation seal make the grooved semi-metallic construction a practical alternative to jacketed or spiral wound gaskets. On high-pressure piping flanges in ASME B16.5 classes, the gasket provides blowout resistance and bolt-load tolerance that sheet gaskets cannot match, while the facing protects the flange surface from the serrated core.

Additional service areas include vessel manways and handholes, valve bonnet and cap joints, pump and compressor casing splits, and large-diameter pipeline flanges where a centering ring simplifies installation. In refinery and petrochemical units, graphite-faced Kammprofile gaskets are common on hydrocarbon, hydrogen and steam services; PTFE-faced variants appear on chemical and pharmaceutical duty where graphite contamination is unacceptable. For low-pressure utility and water-line flanges, the compression-fiber and spiral wound gasket ranges are typically more cost-appropriate; KXT-1130 is positioned for the higher-integrity end of the flange sealing spectrum.

Seating Stress, Reusability and Flange Surface Requirements

The serrated core concentrates stress at the groove crests, so a reliable seal develops at bolt loads significantly lower than those demanded by solid metal gaskets, while the same design tolerates high bolt loads without crushing. This matters on heat exchanger flanges, large vessel connections and lighter-weight flanges where bolt load is limited or flange rotation is a concern.

The metal core is reusable after service: the gasket is disassembled, the core cleaned and inspected (including profile tracing where specified), and new facing material bonded before reinstallation. On expensive alloy cores — Monel, Inconel, Hastelloy or titanium — this can materially reduce lifecycle cost compared with single-use constructions. Reusability does not apply where the core shows mechanical damage, corrosion pitting or groove wear; the decision to reuse rests with the inspecting engineer against the applicable procedure.

Flange surface finish matters. Kammprofile gaskets with sealing layers are typically recommended for a surface finish of 3.2–6.3 μm Ra, with flange faces flat and free from deep radial scratches or dents. A stock finish is generally acceptable, but heavily damaged or warped surfaces should be corrected before installation.

Factory Supply, Custom Materials and Quote Requirements

KXT-1130 is manufactured at Kaxite’s Ningbo facility and supplied factory-direct for OEM, MRO and project procurement. Standard thicknesses are 3.5 mm, 4.0 mm, 4.5 mm and 5.0 mm; non-standard thicknesses, diameters and bolt patterns are made to drawing. Core alloy and facing material are selected against the duty conditions, and the centering ring is sized to the flange standard and class. For buyers consolidating a gasket package, KXT-1130 can be combined with compression sheet lines in a single shipment.

If the application falls outside the Kammprofile envelope entirely — for example, very low bolt load with a highly irregular flange surface — a non-asbestos sheet gasket may be the more practical specification.