INDUSTRY COMPONENT

Gasket

A gasket is a mechanical seal that fills the space between two mating surfaces to prevent leakage under compression.

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Component Specifications

Definition
A gasket is a critical sealing component used in pressure vessel manway assemblies to create a tight, leak-proof seal between the manway cover and the vessel body. It deforms under bolt load to fill microscopic imperfections on flange surfaces, preventing fluid or gas escape under operating pressure and temperature conditions.
Working Principle
The gasket works by being compressed between two flanges (manway cover and vessel body) when bolts are tightened. This compression causes the gasket material to flow into surface irregularities, creating a barrier that prevents leakage. The sealing action relies on sufficient compressive force to maintain contact stress higher than the internal pressure of the vessel.
Materials
Common materials include compressed non-asbestos fiber (CNAF), graphite, PTFE (Teflon), rubber (EPDM, Nitrile), and metal (stainless steel, spiral wound). Material selection depends on temperature, pressure, and media compatibility.
Technical Parameters
  • Thickness 1.5mm to 6mm
  • Inner Diameter Matches manway opening
  • Outer Diameter Flange face coverage
  • Compression Set <20%
  • Pressure Rating Up to 3000 psi
  • Tensile Strength >10 MPa
  • Temperature Range -50°C to 500°C
Standards
ISO 7483, DIN 2690, ASME B16.21, EN 1514

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Gasket.

pressure vessel gasket manway seal industrial gasket flange gasket sealing component gasket material ASME B16.21 ISO 7483 Gasket Gasket in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Pressure Vessel Manway Assembly

Sealed access component for metal tanks and pressure vessels.

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Plate Heat Exchanger

A compact heat transfer device that uses thin, corrugated metal plates to efficiently transfer thermal energy between two fluid streams.

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Filter Cartridge

A replaceable filtration element that captures dust particles from air streams in industrial dust collection systems.

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Engineering Analysis

Risks & Mitigation
  • Leakage due to improper installation
  • Chemical degradation
  • Compression set over time
  • Blow-out under overpressure conditions
FMEA Triads
Trigger: Insufficient bolt torque during installation
Failure: Inadequate sealing leading to leakage
Mitigation: Follow torque sequence and values per manufacturer specifications; use calibrated torque wrenches
Trigger: Chemical incompatibility with process media
Failure: Gasket degradation and seal failure
Mitigation: Verify chemical resistance charts; select appropriate gasket material for specific media
Trigger: Excessive temperature beyond material limits
Failure: Thermal degradation and loss of sealing properties
Mitigation: Select high-temperature rated materials (graphite, PTFE, metal); monitor operating conditions

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5mm on dimensions; surface flatness within 0.1mm
Test Method
Helium leak test per ASTM E499; pressure testing per ASME BPVC Section VIII

Buyer Feedback

★★★★☆ 4.6 / 5.0 (34 reviews)

"The technical documentation for this Gasket is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Gasket so far."

"Testing the Gasket now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

How often should pressure vessel gaskets be replaced?

Gaskets should be replaced during every manway opening or if visual inspection shows signs of compression set, cracking, or chemical degradation. Preventive replacement is recommended during scheduled maintenance.

What factors determine gasket material selection?

Key factors include operating temperature, pressure, chemical compatibility with process media, flange surface finish, and required sealing performance (e.g., fugitive emissions control).

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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