Gasket Sheets — Versatile Sealing Sheets for Industrial Applications

What / Why — Gasket sheets are flat sheet materials cut to size or die-cut into gaskets to seal flange joints and machined surfaces. Selecting the right sheet material prevents leakage, improves safety and reduces maintenance costs.

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Gasket sheet cutting and application

Executive Summary

Our gasket sheet range includes PTFE, compressed non-asbestos sheets, flexible graphite, aramid/nylon composites and specialty elastomeric sheets. This pillar page gathers material properties, sizing, cutting options and downloads to help procurement, engineers and maintenance teams make fast, confident choices.

What is a Gasket Sheet?

Gasket sheets are flat, engineered sealing materials supplied in standardized sheet sizes and thicknesses. They are used to produce flange gaskets, equipment seals and custom-cut parts. Sheets are chosen based on media compatibility, pressure, temperature, surface finish and regulatory requirements.

Gasket Sheet Classification

By Material

  • PTFE Sheets (pure, filled, conductive)
  • Compressed Non-Asbestos Sheets (CNAS - aramid/fiber blends)
  • Flexible Graphite Sheets (with/without stainless steel facing)
  • Elastomeric Sheets (NBR, EPDM, Viton®)
  • Metallic / Laminate Sheets (metallic + filler)

By Structure

  • Solid sheets (cut-to-size)
  • Faced sheets (metal/foil facing)
  • Reinforced laminate
  • Multi-layer composite sheets

By Application

  • High temperature steam service
  • Corrosive chemical service
  • Potable / food-grade sealing
  • High-pressure / high stress flanges
  • Low-pressure HVAC and water systems

Selection Guide — How to Choose a Gasket Sheet

  1. Identify service media (chemistry, pH, solids).
  2. Confirm temperature & pressure — include start-up and transient conditions.
  3. Check flange specs — face type, bolt loads, surface finish.
  4. Regulatory / hygiene — food, pharma or potable water require certified materials.
  5. Consider compressibility and recovery for thermal cycling.
  6. Decide on faced or unfaced — metal facing improves blowout resistance on coarse flange finishes.
Tip: For aggressive chemicals use PTFE; for steam & high temp choose flexible graphite (consider stainless facing for safety); for standard oil & water services compressed non-asbestos sheets are cost-effective.

Technical Parameters & Common Dimensions

Below are sample operating ranges and standard sheet sizes.
Material Temp Range (°C) Max Pressure (bar) Typical Thickness (mm) Key Use
PTFE (pure) -200 to 260 ≤ 100 0.5 / 1.0 / 1.5 / 3.0 Chemicals, food, pharma
Compressed Non-Asbestos (CNAS) -40 to 230 ≤ 100 0.5 / 1.0 / 1.5 / 2.0 General purpose, oil & water
Flexible Graphite (with/without facing) -200 to 450 ≤ 250 0.5 / 1.0 / 2.0 Steam, high temp services
Elastomeric (NBR / EPDM / FKM) -50 to 200 ≤ 40 1.0 / 2.0 / 3.0 Low pressure, water, HVAC

Standard Sheet Sizes

Sheet Size (mm) Thickness Options (mm) Typical Use
1000 x 1000 0.5, 1.0, 2.0 Small flange gaskets, cut-to-size
1500 x 1500 1.0, 2.0, 3.0 Large flange gaskets & custom patterns
2000 x 1000 1.5, 3.0 Fabrications & gasket kits

Datasheets & Downloads

Download material datasheets, chemical resistance charts and cutting templates.

Cutting, Storage & Handling Recommendations

  1. Cutting: Use waterjet, CNC die-cut or manual gasket cutters depending on material. For PTFE prefer low-heat methods to avoid edge fraying.
  2. Storage: Store sheets flat in a clean, dry area away from direct sunlight and solvents.
  3. Handling: Avoid contamination of sealing faces — wear gloves and keep clean cutting surfaces.
  4. Edge finishing: For critical services consider edge-welding or adhesive sealing for PTFE sheets to prevent permeation.
gasket sheet manufacture
Cutting & handling flowchart — optimize cut method by material.

Application Industries & Case Studies

Common industries that use gasket sheets:
  • Chemical & Petrochemical — aggressive chemicals and solvents
  • Food & Beverage — sanitary gaskets from PTFE or FDA-grade sheets
  • Power & Utilities — steam and high-temperature sealing
  • Marine & Desalination — corrosion-resistant sealing
  • Oil & Gas — high-pressure flange sealing

Case Study — Corrosion-Resistant Sealing in Chemical Plant

Problem: Frequent gasket failures due to aggressive acids. Solution: Replaced CNAS gaskets with filled-PTFE sheets and added PTFE-faced metal washers on bolting. Result: Zero leaks in critical lines for 24 months.

Performance Comparison & Material Selection Matrix

Property PTFE CNAS Graphite Elastomer
Chemical resistance Excellent Good Good Varies
Temperature range Wide Moderate Very wide Limited
Compressibility / recovery Moderate High Low-Moderate High
Suitable pressure Low-Mid Mid High Low
Food-grade available Yes Limited No Yes (selected)

Common Failures & Troubleshooting

Leakage after installation
Causes: Incorrect sheet thickness, surface finish incompatibility, poor torque. Action: Verify flange finish, use correct thickness, follow torque sequence.
Blowout or extrusion
Causes: Excessive pressure, wrong material, coarse flange finish. Action: Use faced sheet, increase sheet stiffness or use metallic/laminate solutions.
Chemical degradation
Causes: Incompatible material selection. Action: Check chemical resistance chart and switch to PTFE or compatible material.

FAQ — For Purchasing / Engineering / Maintenance

Q: Which sheet thickness should I choose for ANSI 150 flange?A: Typical selections range from 1.0 mm to 3.0 mm depending on surface finish and bolt load; consult flange design and gasket seating stress charts for final selection.
Q: Can PTFE sheets be welded?A: PTFE can be edge-welded under specific conditions; consult the PTFE datasheet and your supplier for recommended methods and adhesives.
Q: What info is required for a fast quote?A: Provide material type, desired thickness, sheet size or cut profile, estimated quantity, and service conditions (T, P, media).
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Contact our technical team for material selection, testing data and custom solutions.
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