1,Product Core

Sealing Graphite Tape is made of high-purity expanded graphite as the core substrate, supplemented by high-strength metal reinforcement layers (such as stainless steel mesh and nickel mesh), and processed through special pressing and forming processes. Its core positioning is "an efficient sealing solution for industrial high-temperature conditions", which can achieve "zero leakage" sealing effect in key sealing parts such as boiler furnaces, flues, and steam drums. At the same time, it has excellent temperature resistance, corrosion resistance, and deformation adaptability, solving the pain points of traditional sealing materials (such as asbestos and ordinary rubber) that are prone to aging and sealing failure at high temperatures.

2,Product Features

Super high temperature stability: Long-term use temperature range covers -200℃~600℃, can withstand instantaneous high temperatures above 800℃ in inert gas environment, without softening, carbonization or decomposition phenomenon, and can stably adapt to temperature fluctuations during boiler start-stop and normal operation;

Excellent sealing and adhesion: Graphite substrate has natural flexibility and plasticity, with a compression rebound rate of ≥35%. It can tightly adhere to irregular defects on the sealing surface (such as small scratches, concave-convex differences ≤0.5mm) without the need for additional glue to form an effective sealing barrier, and the installation convenience is improved by 40%;

Broad spectrum corrosion resistance: Sealing Graphite Tape has good tolerance to common media in boiler operation (such as steam, high-temperature flue gas, weakly acidic condensate water, boiler feedwater), does not undergo dissolution, swelling or corrosion reactions, and has a service life of 3-5 years (traditional asbestos tape has a service life of only 1-2 years);

High strength tear-resistant structure: The metal reinforcement layer is compounded with graphite substrate through molecular-level bonding technology, with a transverse tensile strength of ≥15MPa and a longitudinal tensile strength of ≥12MPa. It is not easy to break under installation and working vibration (amplitude ≤0.3mm), avoiding sealing failure caused by material damage;

Environmentally friendly and harmless: It does not contain harmful substances such as asbestos and heavy metals, complies with international environmental standards such as RoHS and REACH, and does not release toxic gases during installation and disposal, ensuring the health and environmental safety of operators.

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