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Radiation Resistant Flexible Graphite Gasket ASTM Certified for Oil / Gas Pipelines

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Radiation Resistant Flexible Graphite Gasket ASTM Certified for Oil / Gas Pipelines

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Brand Name : CLINGSEAL

Model Number : CSG80

Certification : ISO,SGS

Place of Origin : CHINA

MOQ : 500kg

Price : 2.2USD PER KG

Payment Terms : T/T, Western Union, MoneyGram

Supply Ability : 500Tons per month

Delivery Time : 20 days

Packaging Details : pallet/wooden case

Grade : Industrial Grade

Type : Flexible Sheet

Application : gaskets

C content (%) : 99.9%

Thickness : Customers' Demand

Material : Graphite,High pure graphite

Fatigue Resistance : Repeated Stress Resistance

Wear Resistance : Long - Lasting Surface

Radiation Resistance : Resistant to Ionizing Radiation

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Products Description

ASTM-Certified Flexible Graphite Gasket Solutions

Product Overview

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

  1. 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).
  2. 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.
  3. 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

  1. Oil & Gas Pipelines
    • ASTM F43-compliant gaskets for flange connections in API 6A wellheads, ensuring leak-free performance in H₂S-containing environments.
  2. Power Generation
    • Composite gaskets with stainless steel inserts (ASTM A240) for steam turbines, meeting ASME BPVC Section VIII requirements.
  3. Pharmaceutical Equipment
    • FDA-listed materials (ASTM F1877) for diaphragm valves, ensuring compliance with cGMP regulations.

Custom Specifications with ASTM Compliance

  • Dimensions:
    • Rolls: 1000mm/1500mm width, 30m/50m/80m length (ASTM F137 width tolerance ±0.5mm).
    • 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

Radiation Resistant Flexible Graphite Gasket ASTM Certified for Oil / Gas Pipelines

Radiation Resistant Flexible Graphite Gasket ASTM Certified for Oil / Gas Pipelines

Radiation Resistant Flexible Graphite Gasket ASTM Certified for Oil / Gas Pipelines


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