INDUSTRY COMPONENT

Gasket

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

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
ParameterTypical rangeNotes & selection driver
Thickness1.5mm to 6mm
Inner DiameterMatches manway opening
Outer DiameterFlange face coverage
Compression Set<20%
Pressure RatingUp to 3000 psi
Tensile Strength>10 MPa
Temperature Range-50°C to 500°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 7483, DIN 2690, ASME B16.21, EN 1514

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Gasket

Manufacturer profiles associated with Gasket.

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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).

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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