Corrugated Graphite Sealing Tape

1. Core Product Positioning

Corrugated Graphite Sealing Tape is made from 99.5% high-purity flake graphite as the substrate, compounded with a temperature-resistant elastic adhesive (maximum temperature resistance of 800℃), and manufactured via the big data-optimized "precision corrugated forming + low-temperature curing" process; its core function is to provide a "reliable sealing + easy installation + long service life" solution for general industrial scenarios (pipes, valves, reactors) ranging from medium-low to medium-high temperatures (-200℃~800℃). It addresses the pain points of the carcinogenic risk of traditional asbestos gaskets, insufficient temperature resistance of rubber gaskets (prone to aging at temperatures ＞250℃), and poor adaptability of ordinary graphite gaskets. Ranked among the TOP 4 fastest-growing products in the 2025 global general sealing materials market (19.3% annual growth rate, with petrochemical/water treatment/general machinery applications accounting for 76%; Data Source: Global Industrial Sealing Materials Market Report 2025).

2.Technical Parameters

3.Core Features

Wide Temperature Range Adaptability & Performance Stability: After 1,800 hours of "-200℃~800℃" thermal cycle testing, the sealing performance attenuation is ≤3.8% - twice the stability of ordinary graphite sealing tapes (which have 12% performance attenuation above 600℃). No brittleness or cracking at low temperatures (10 folds at -200℃ without breaking) and no carbonization at medium-high temperatures, making it suitable for scenarios such as pipelines in frigid northern regions (-40℃), food sterilization equipment (150℃), and chemical medium-temperature reactors (600℃). The multi-working-condition sealing failure rate of downstream customers is reduced by 85%.

High-Efficiency Sealing & Leakage Prevention: The unique "arc-shaped corrugated structure" (corrugation height: 0.3-2.5mm, customizable) increases the contact area of the sealing surface by 45%. After 1,000 medium-high pressure sealing tests (maximum pressure of 18MPa), the leakage rate is ≤8×10⁻⁷ Pa·m³/s, far exceeding the Chinese National Standard GB/T 4622.3-2021 for general sealing leakage (≤1×10⁻⁵ Pa·m³/s). The qualification rate of flange sealing for petrochemical pipelines reaches 99.4%.

Strong Corrosion Resistance & Chemical Compatibility: After 960 hours of immersion testing (acid-base solutions with pH 2-13, organic solvents such as acetone/ethylene glycol), the mass loss rate is ≤1.8%, with no swelling or delamination. Suitable for sealing chlorine-containing wastewater pipelines in the water treatment industry (chlorine corrosion resistance) and weak acid-base media in the chemical industry, its service life is extended to 2-3 years, compared to rubber gaskets (which have a corrosion resistance cycle of 3 months).

High Adaptability & Easy Processability: Thickness ranges from 0.2-6mm (customizable), with room-temperature flexibility enabling 300 bending cycles without cracks. It still maintains a certain elasticity at 800℃ (compression rebound rate ≥85%). Through CNC cutting testing, the edge flatness after cutting into arbitrary sizes (maximum width of 1,500mm) and irregular sealing surfaces (e.g., elliptical flanges) is ≤0.1mm. It is compatible with over 96% of general industrial sealing surfaces (flanges, valves, pumps), and the installation efficiency is 55% higher than that of traditional sealing gaskets.

 

 

4. Core Applications

Petrochemical Field (35% proportion, the largest application scenario):Corrugated Graphite Sealing Tape is used for sealing crude oil transmission pipeline flanges (-20℃~80℃) and medium-temperature pipelines of catalytic cracking units (300℃~500℃). According to test data from PetroChina Lanzhou Petrochemical, it can reduce the pipeline leakage failure rate from 6.1% to 0.4%, and cut the annual sealing maintenance cost of a single unit by 380,000 RMB. Suitable for sulfur-containing medium pipelines (hydrogen sulfide corrosion resistance), its sealing reliability meets the requirements of continuous production.

Water Treatment Field (22% proportion): Used as sealing for centrifugal pumps in sewage treatment plants (room temperature, chlorine-containing wastewater) and pipeline flanges in waterworks (-5℃~40℃). Its service life is extended to 2.5 years, compared to rubber gaskets (prone to corrosion and aging by chlorine), and the average sealing replacement cycle of waterworks equipment is extended from 2 months to 18 months. It complies with GB/T 17219-1998 Safety Standard for Drinking Water Transmission and Distribution Equipment, with no harmful substances precipitated.

General Machinery Field (28% proportion): Applied for sealing compressor valves (150℃~300℃), printing equipment roller shafts (room temperature), and textile machinery bearings (50℃~120℃). It solves the problem of traditional gaskets being prone to wear and requiring frequent shutdowns for replacement, reducing the comprehensive failure rate of general machinery equipment by 42%. It has better installation adaptability than metal gaskets for irregular sealing surfaces (e.g., special-shaped valve interfaces).

Food & Pharmaceutical Field (15% proportion): Used for sealing flanges of food sterilization tanks (121℃, steam environment) and pipelines of pharmaceutical freeze dryers (-50℃~80℃). It complies with FDA 21 CFR Part 177.2600 for food contact materials, with no peculiar smell or impurity precipitation at high temperatures, ensuring food and pharmaceutical hygiene and safety. According to tests by Mengniu Dairy, all migration tests of the gaskets meet standards, satisfying the compliance requirements of food production.

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