1. Product Core

Sealing Graphite Tape takes high-purity expanded graphite as its core substrate, reinforced with high-strength metal layers (e.g., stainless steel mesh, nickel mesh), and is manufactured via specialized compression and molding processes. Its core positioning is a high-efficiency sealing solution for high-temperature industrial scenarios-it can deliver "zero-leakage" sealing performance at key sealing components such as boiler furnaces, flues, and steam drums.

Meanwhile, it features outstanding temperature resistance, corrosion resistance, and deformation adaptability, effectively addressing the drawbacks of traditional sealing materials (including asbestos and conventional rubber) that are prone to aging and sealing failure under high temperatures.

2. Product Features

Superior High-Temperature Stability

The long-term operating temperature range spans from -200℃ to 600℃. Even in an inert gas environment, it can withstand instantaneous high temperatures exceeding 800℃ without softening, carbonization, or decomposition. This allows stable adaptation to temperature fluctuations during boiler startup, shutdown, and normal operation.

Excellent Sealing & Adhesion

The graphite substrate boasts inherent flexibility and plasticity, with a compression rebound rate of ≥35%. It can tightly conform to irregularities on the sealing surface (e.g., minor scratches, surface variations of ≤0.5mm) without requiring additional adhesives, forming a reliable sealing barrier. This enhances installation efficiency by 40%.

Broad-Spectrum Corrosion Resistance

Sealing Graphite Tape exhibits excellent resistance to common media encountered in boiler operations, including steam, high-temperature flue gas, weakly acidic condensate, and boiler feedwater. It resists dissolution, swelling, or corrosive degradation, with a service life of 3–5 years-compared to just 1–2 years for traditional asbestos tape.

High-Strength Tear-Resistant Structure

The metal reinforcement layer is integrated with the graphite substrate via molecular bonding technology, achieving a transverse tensile strength of ≥15MPa and a longitudinal tensile strength of ≥12MPa. It resists breakage during installation and under operational vibrations (amplitude ≤0.3mm), preventing sealing failure due to material damage.

Eco-Friendly & Harmless

It is free of hazardous substances like asbestos and heavy metals, and meets international environmental standards including RoHS and REACH. No toxic gases are emitted during installation or disposal, safeguarding the health of operators and environmental safety.

3,Product Usage

Core Application Scenario - Boiler System

Sealing the gap between the boiler furnace and the water-cooled wall;

Dynamic and static sealing of flue baffle and expansion joint;

Sealing of flanges for steam drum manholes and handholes;

Sealing of tube boxes for economizer and air preheater;

Extended Application Scenarios - Industrial Universal Seals

Petrochemical industry: flange sealing for heat exchangers and reactors;

Power industry: shaft end seals for steam turbines and generators;

Metallurgical industry: gap sealing of high-temperature furnace doors and flues;

Nuclear power industry: flange sealing of conventional island steam pipelines (low radiation areas).

4,Technical Parameters

Technical Parameter Project	Parameter Range	Remarks
Substrate Purity	≥99.8% (expanded graphite)	Fixed carbon content
Enhancement Layer Material	304 stainless steel/nickel alloy	Customizable according to working conditions
Long-term Use Temperature	-200℃~600℃	Air environment
Instantaneous Temperature Resistance	≤800℃	Inert gas environment, duration ≤30 minutes
Applicable Pressure	0~20MPa	When the roughness Ra of the sealing surface is ≤3.2μm
Compression Rebound Rate	≥35%	Rebound value at 25% compression
Thickness Specification	0.5mm~5mm	Customizable on demand, with a tolerance of ±0.05mm
Width Specification	10mm~500mm	Can be cut as needed, with a maximum continuous length of 50m per roll
Density	1.6g/cm³~1.8g/cm³	Overall density (including reinforcement layer)
Media Compatibility	Water resistance, steam resistance, weak acidity and alkalinity (pH 2-12), organic solvents	Strong oxidizing media (such as concentrated nitric acid) require customized special formulas
Execution Standard	GB/T 26295-2010 "Flexible Graphite Sheet", ASTM C721-2019	Meets both international and domestic double standards