GRAPHITESEAL ULTRA 350 —
graphite composite gasket for steam, oxygen-documented service and high-temperature duty
Oxygen documentation alone does not decide between BLUESEAL and GRAPHITESEAL because both source sets include BAM references. Compare the actual report scope, steam limit, medium, pressure-temperature envelope and joint design.
Documentation scope: Approval, compliance and certification references apply to the documented material grade, supplier certificate or listing, and stated test conditions unless a product-specific certificate says otherwise. A cut gasket size is not automatically certified as a separate product just because it is made from a documented material. For regulated applications, confirm the current certificate or listing scope, exact grade, medium, temperature, pressure and market requirement before specifying.
Selection rule: GRAPHITESEAL is for heat, steam and thermal cycling where fibre grades reach their limit.
Use this when: steam, high-temperature industrial duty and dynamic loads within the published exact-grade envelope; oxygen use additionally requires a matching BAM report scope.
Do not use this when: do not use it as a generic upgrade where GREENSEAL or BLUESEAL already matches the medium, face and temperature.
Move to this material when: the selected aramid grade's verified steam, temperature or dynamic-load envelope is insufficient; oxygen duty still requires report-by-report comparison.
What it is
GRAPHITESEAL ULTRA 350
Source boundary: the mapped graphite-grade technical sheet reports 350°C short-term, 280°C continuous, 250°C with steam and 100 bar, plus BAM and the listed industrial references. Those are separate material limits under proper seating conditions. Use the combined pressure-temperature envelope and current BAM report scope for the actual joint.
GRAPHITESEAL ULTRA 350 is a compressed fibre gasket material combining aramid fibres, lamellar graphite and an NBR binder. It is the specialist graphite composite in the Kinetics Line range — the material usually specified when temperature, steam rating or thermal cycling severity moves the specification beyond what standard aramid fibre can reliably cover.
The mapped graphite-grade construction combines aramid fibre, lamellar graphite, mineral fillers and NBR binder. Its suitability for steam, dynamic load and higher temperature is established by the grade's published test data and service limits; do not assign the complete result to one constituent or assume the binder has disappeared from the system.
Temperature range — what each rating means
Peak and continuous temperatures are not for simultaneous use with maximum pressure. Allowable pressure decreases as temperature increases. Consult technical data for the combined operating envelope.
The mapped GRAPHITESEAL grade reports 250°C continuous with steam, while the mapped BLUESEAL grade reports 200°C. That difference is a screening boundary, not permission for a high-pressure steam joint: pressure falls with temperature and the gasket, bolts, flanges, medium and assembly method must be checked together.
Thermal limits — interactive reference
Set the system temperature and medium below to see which materials remain within their rated operating limits.
Why graphite — what it adds over standard aramid
GRAPHITESEAL ULTRA 350
- Continuous service to 280°C
- Steam to 250°C
- BAM documented for oxygen-service assessment
- BS 7531 Grade Y — UK industrial standard
- DIN 28091 — German industrial flanges
- Anti-stick on one face
- For steam lines, boilers, power plant, O₂ service
BLUESEAL ULTRA 350 — Aramid only
- Continuous service to 250°C
- Steam to 200°C
- DVGW, WRAS, BAM and SVGW references; one mapped BLUESEAL source also lists ABS and DNV
- Anti-stick on both faces
- Better chemical resistance profile
- For gas, chemicals, oils, general industrial
- Usually considered first below 200°C steam
BLUESEAL or GRAPHITESEAL? Compare the exact medium, temperature-pressure envelope, residual-stress data, dynamic load and required documentation. The mapped BLUESEAL grade reports 200°C with steam; the mapped GRAPHITESEAL grade reports 250°C. Thermal cycling and oxygen duty still need joint-specific assessment and current document scope.
Approvals
BAM
Bundesanstalt für Materialforschung, GermanyBAM oxygen-service documentation. The report scope must be checked against the tested pressure, temperature, oxygen medium and test conditions before specifying for oxygen pipelines, cylinders or medical gas systems.
Oxygen serviceDIN 28091
German Institute for StandardisationDefines requirements for non-metallic flat gaskets for industrial flanges. Compliance confirms the material meets dimensional, mechanical and functional requirements for standard flanged joint applications in German industrial practice.
Industrial flangesBS 7531 Grade Y
British Standard — compressed fibre gasketsThe material is classified as BS 7531 Grade Y. Grade letters define different requirement sets and should not be presented as a universal performance ranking; verify the clauses relevant to the intended medium and duty. Specifying BS 7531 Grade Y is common in UK industrial and process engineering procurement.
UK industrial standardNon-asbestos
Asbestos-free compositionAramid fibre, lamellar graphite and NBR binder only. Relevant for procurement compliance in industries where asbestos-free documentation is required for material qualification.
Asbestos-freeWhere GRAPHITESEAL ULTRA 350 is specified
- Steam lines and high-temperature piping — steam duties above the selected aramid grade's verified steam limit, subject to a full pressure-temperature and joint assessment
- Boilers and heat exchangers — repeated thermal cycling, high joint face temperatures, conditions where standard aramid fibre approaches its rated limit
- Oxygen service — assess against the BAM report scope for the tested pressure, temperature, oxygen medium and conditions
- Chemical and petrochemical plant flanges — alkalis, oils, fuels at elevated temperature and pressure within the rated envelope
- Power plant equipment — turbine connections, high-pressure valves, process isolation flanges
- BS 7531 Grade Y specified procurement — only where the supplied material mapping, current documentation and complete purchase specification confirm that exact requirement
- Dynamic load applications — joints subject to dynamic load, vibration or pressure fluctuation at elevated temperature within the verified envelope
Not for potable water service. For UK WRAS-required drinking-water applications, specify REDSEAL PRO 110 or BLUESEAL ULTRA 350 within their listed scope. Where FDA food-contact evidence is relevant, assess the exact cited scope; for German drinking water, require current product conformity rather than relying on GREENSEAL PRO 180's legacy supplier-sheet KTW notation. GRAPHITESEAL ULTRA 350 is not the material for potable-water service.
GRAPHITESEAL vs BLUESEAL — when to specify which
Consider GRAPHITESEAL when
- Steam above 200°C continuous
- Continuous service above 250°C
- Oxygen service — BAM report scope required and checked
- BS 7531 Grade Y specified in procurement
- Severe thermal cycling — boilers, heat exchangers
- Power plant or heavy industrial service
- Dynamic loads with vibration at elevated temperature
Consider BLUESEAL when
- Gas lines — DVGW or SVGW approval required
- Chemical and solvent resistance is the priority
- Steam below 200°C continuous
- WRAS documentation required for potable water
- Anti-stick on both faces is preferred
- The application does not require the higher steam or oxygen rating
Anti-stick coating — one face
GRAPHITESEAL ULTRA 350 is supplied with anti-stick treatment on one face. The finish is intended to reduce adhesion during disassembly, but the datasheet does not guarantee clean release after a particular steam exposure.
After isolation, cooling and depressurisation, separate the joint carefully and inspect both faces. Treat anti-stick as a supplied surface feature, not quantified proof of lower removal force or reduced face damage.
Sizes and packaging
| BSP size | Dimensions (mm) | SKU 25 pcs | SKU 100 pcs |
|---|---|---|---|
| 3/8″ | 14.5 × 9 × 2 | B-2014GES43-25 | On request |
| 1/2″ | 18.5 × 11 × 2 | B-2014GES44-25 | On request |
| 3/4″ Special | 24 × 14.5 × 2 | B-2014GES45-25 | On request |
| 1″ | 30 × 21 × 2 | B-2014GES45A-25 | On request |
| 11/4″ | 39 × 30 × 2 | B-2014GES45AB-25 | On request |
| 11/2″ | 44.5 × 36 × 2 | B-2014GES45AC-25 | On request |
| Box set 3/8″ to 1″ — 300 pcs, 6 sizes | B-2014BOX7 | ||
100 pcs packs available on request for individual sizes. Custom dimensions and sheet material available through B2B contact. Standard thickness 2 mm across all BSP sizes.
GRAPHITESEAL ULTRA 350 is the specialist graphite composite in the Kinetics Line system — for steam, oxygen service and high-temperature industrial applications where standard aramid fibre is not rated for the operating conditions.
The material composition and test data support its steam and dynamic-load positioning; BAM documentation is a separate report whose scope must be checked. Do not infer another Kinetics Line grade's documentation status without checking its current report. Below BLUESEAL's verified steam limit, compare both grades on medium, joint data and required documentation rather than upgrading by colour alone. For service conditions at the demanding end of the range, GRAPHITESEAL is usually the next material considered in the specification.