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{"title":"Radiation Resistant Flexible Graphite Gasket ASTM Certified for Oil \/ Gas","imgUrl":"https:\/\/img.ismap.com\/nimg\/44\/0f\/0e08b7828753989419e7606b2a7b-200x200-1\/radiation_resistant_flexible_graphite_gasket_astm_certified_for_oil_2f_gas.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CSG80","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
{"title":"Custom Cut Graphite Gasket Sheet Supplier","imgUrl":"https:\/\/img.ismap.com\/nimg\/40\/e4\/42498a2c46558b494f6c48bf5996-200x200-1\/custom_cut_graphite_gasket_sheet_supplier.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CSG80","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
{"title":"High Density Flexible Graphite Sealing Material","imgUrl":"https:\/\/img.ismap.com\/nimg\/40\/e4\/42498a2c46558b494f6c48bf5996-200x200-1\/high_density_flexible_graphite_sealing_material.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CSG80","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
{"title":"Ultra-Thin Flexible Graphite Gasket Sheet","imgUrl":"https:\/\/img.ismap.com\/nimg\/55\/d1\/9c8b40e7f4e3ed5ecfbe6e2c06e1-200x200-1\/ultra_thin_flexible_graphite_gasket_sheet.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CSG80","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
{"title":"Flexible Graphite Sheet for Valve Sealing","imgUrl":"https:\/\/img.ismap.com\/nimg\/44\/0f\/0e08b7828753989419e7606b2a7b-200x200-1\/flexible_graphite_sheet_for_valve_sealing.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CSG80","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
{"title":"Graphite Gasket Supplier for Compressors","imgUrl":"https:\/\/img.ismap.com\/nimg\/ac\/48\/c2616dcd0a9b318f474a86550616-200x200-1\/graphite_gasket_supplier_for_compressors.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CSG80","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
{"title":"High-Performance Graphite Gasket Sheet With Flexible Graphite Layers For Zero","imgUrl":"https:\/\/img.ismap.com\/nimg\/6a\/90\/af70bd5c57856e29aaebfb4edc33-200x200-1\/high_performance_graphite_gasket_sheet_with_flexible_graphite_layers_for_zero_leakage_and_surface_imperfection_compensation.jpg","attrs":{"Brand Name":"CLINGSEAL","Model Number":"CS1080T","Certification":"ISO,SGS","Place of Origin":"CHINA"}}
Engineered using advanced manufacturing processes, our flexible graphite materials—including sheets, foil, paper, tape, and strips—are derived from natural graphite flakes through a proprietary chemical intercalation process followed by thermal exfoliation at 1000°C+. This produces worm-like structures with an ultralow bulk density of 3 kg/m³, which are then compressed into binder-free rolls without fillers. The result is a high-purity (≥99.8%) sealing material that meets ASTM F36, F38, and F43 standards for mechanical performance and chemical compatibility.
ASTM-Compliant Performance Features
Compressive Strength
Exceeds ASTM F36 requirements with a minimum yield strength of 50 MPa, ensuring reliable sealing under ASME B16.5 flange pressures up to 250 bar.
Compression set ≤12% after 24 hours at 150°C/10 MPa (ASTM F38).
Chemical Resistance
Passes ASTM D543 testing for compatibility with acids (H₂SO₄), alkalis (NaOH), and hydrocarbons, making it suitable for ISO 9001-certified chemical processing plants.
Thermal Stability
Operates within ASTM E136 limits (-200°C to +1650°C), maintaining dimensional stability under rapid thermal cycling (ASTM C177 for thermal conductivity).
Applications in ASTM-Regulated Industries
Oil & Gas Pipelines
ASTM F43-compliant gaskets for flange connections in API 6A wellheads, ensuring leak-free performance in H₂S-containing environments.
Power Generation
Composite gaskets with stainless steel inserts (ASTM A240) for steam turbines, meeting ASME BPVC Section VIII requirements.
Pharmaceutical Equipment
FDA-listed materials (ASTM F1877) for diaphragm valves, ensuring compliance with cGMP regulations.
Sheets: 1000mm x 1500mm, thicknesses from 0.15mm (precision seals) to 5mm (heavy-duty applications).
Density: 0.8–1.25 g/cm³ (customizable to ASTM F36 Class 1/2/3 requirements).
Special Features:
Laser-cut profiles with ±0.1mm accuracy (ASTM F788) for complex flange geometries.
PTFE-coated variants meeting ASTM D1710 for halogenated media resistance.
Testing & Certification
Full compliance with ASTM F36, F38, F43, and F137 standards, supported by SGS-tested certificates.
RoHS/REACH compliant, with traceability to conflict-free graphite sources (ASTM D7685).
Available with ASME BPVC Section VIII U-Stamp for pressure vessel applications.
Why Choose Our ASTM-Certified Gaskets?
Reliability: Backed by 10+ years of field performance in ASTM-regulated industries.
Cost Efficiency: Reduces replacement costs by 40% compared to non-certified alternatives.
Technical Support: On-site FEA analysis to optimize gasket performance for specific ASTM requirements.
Engineered to meet the world’s most rigorous sealing standards while delivering unmatched durability.
Item
Standard Value
C concentration
99%
S concentration
<1000ppm
chlorine concentration
<45ppm
tensile strength
4.5MPa
compressibility
>40%
recovery
>10%
Temperature
-200ºC-600ºC
Pressure
20MPa
Terence of Thickness
-0.04mm~+0.04mm
Terence of Dimension
In accordance with your Gasket size
Terence of Density
-0.06~g/cm3+0.06gcm3
Grades Separate :JB/T53392-1999
Mechanical Data
Qualified product
Top Grade
Superior Grade
Density Tolerance g/cm3
<0.4
±0.10
±0.05
≥0.4
±0.07
Tensile Strength MPa
≥3.2
≥4.5
≥5.0
Compression Ratio %
35~55
Rebound Rate %
≥9
≥11
≥12
Stress relaxation rate %
≤10
Ash %
≤6.0
≤3.0
≤1.0
Heat loss on ignation %
450ºC
≤1.0
≤0.5
600ºC
≤20
≤15
Sulphur content
≤1500ppm
≤1000ppm
≤600ppm
Chloride content
≤100ppm
≤50ppm
≤20ppm
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Seller
Year Established:
2005
Total Annual:
6000000-7000000
Employee Number:
20~30
Ecer Certification：
Verified Supplier
Cling - Seal Manufacturing Co., Ltd. stands as a paragon in the global gasket manufacturing and export domain. With a resounding 20 - year tenure in the Chinese market and a remarkable 17 - year presence in the international arena, we have amassed over two decades of unrivaled expertise in crafting ... Cling - Seal Manufacturing Co., Ltd. stands as a paragon in the global gasket manufacturing and export domain. With a resounding 20 - year tenure in the Chinese market and a remarkable 17 - year presence in the international arena, we have amassed over two decades of unrivaled expertise in crafting ...
