Graphite Sheets

High-temperature flexible graphite

Reinforced flexible-graphite sheet that seals to +650°C in steam, holding the line where fibre and elastomer jointing break down.

Seals to +650°C in steam and oxidising service
316 SS tanged or adhesive insert for strength and blow-out resistance
Conforms to imperfect flange faces under load
Resistant across virtually the entire pH range
Low creep and excellent hot-load retention

Temperature: -200°C to +650°C (steam) / +550°C (oxidising)
Pressure: Up to 140 bar (reinforced)
pH range: 0 – 14

Reinforced flexible graphite sheet with a 316 stainless tanged insert — Gasket Rolls & SheetsREF · graphite-sheet

Technical DatasheetSPEC

The numbers, on the record

Every figure below is the specification we hold ourselves to — material, service envelope, media compatibility and conformance. Download it as a standalone document for your dossier.

SealGuard

Technical Datasheet

Doc No.: DS-GRAPHITE-SHEET
Revision: Rev. A
Issue: 2026-Q3
Class: Gasket Rolls & Sheets

Graphite Sheets

High-temperature flexible graphite

01

Material & Construction

Flexible graphite foil reinforced with a 316 stainless tanged or flat insert

02

Service Envelope

Temperature range	-200°C to +650°C (steam) / +550°C (oxidising)
Pressure rating	Up to 140 bar (reinforced)
pH range	0 – 14

03

Media Compatibility

SteamHydrocarbonsMineral oilsMost acids & alkalis

04

Dimensions & Sizing

Sheets 1000×1000 / 1500×1500 mm · 0.8–3.0 mm · tanged or flat insert

05

Standards & Conformance

DIN 28090-2
ASME B16.21
EN 1514-1

06

Certifications

ISO 9001
Fire-safe
TA-Luft (VDI 2440)

07

Additional Specifications

Graphite purity	≥ 98% carbon
Reinforcement	316 SS tanged / flat / tinplate

Density	1.0–1.4 g/cm³
Oxidation limit	+450–550°C continuous in air

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01

Material grades

Graphite / 316 SS tanged insert
Graphite / 316 SS flat (adhesive) insert
Graphite / tinplate insert
Laminated graphite (adhesive bonded)
Pure graphite foil (un-reinforced)

02

Sizes & configurations

1000 × 1000 mm sheet
1500 × 1500 mm sheet
0.8 / 1.0 / 1.5 / 2.0 / 3.0 mm thick
Tanged or flat insert
Die-cut gaskets to drawing
Slit tape / strip

In ServiceUSE

Where it holds the line

Flexible graphite is the material of choice for high-temperature jointing, sealing reliably in steam and oxidising service well beyond the limit of any fibre or elastomer sheet. A tanged or adhesive 316 stainless insert gives the sheet the handling strength and blow-out resistance it needs for fabrication and high-pressure flanges, while the graphite itself conforms to surface imperfections under load and resists almost the entire chemical range. It is the dependable answer for boiler, turbine and thermal-fluid flanges.

Typical applications

01High-temperature steam and boiler flanges
02Turbine and thermal-fluid systems
03Heat exchanger and economiser covers
04Exhaust and flue-gas joints
05High-pressure hydrocarbon service

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