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Gaskets and Sheet Jointings

Metcom® gasket

Description
This gasket is certified for emission control applications.

It comprises a thin corrugated steel joint with pressed concentric grooves 6mm wide. Two adjacent grooves on either side are filled with beads of expanded-graphite Supagraf® Tape - either standard or high purity grades, depending on application.

When compressed between flanges, the metal corrugations provide a sealing capability that is enhanced by the graphite beads.

Typical applications

Pipelines and pressure vessels with Class 150 to 2500 flanges, or equivalent.

Prime features

  • Thinner than a spiral wound gasket - it can usually be fitted in place of a sheet jointing gasket in a pipe run.
  • Self-locating, and often easier to install than a sheet graphite gasket.
  • When supplied with tapered-slot lugs, this gasket can be used on a variety of flanges with differing bolt diameters and pitch circles.

Specification

  • Metcom® Type FG316L gasket is certified as meeting TA-Luft emission control requirements.

Physical properties
Standard metal cores in a selection of stainless steels. Other alloys are available.
Supagraf® graphite thickness, mm: 0.35 to 0.5.
Nominal overall thickness (uncompressed), mm: 1.5
Compressed thickness, mm: 0.5.

Service capabilities
Maximum temperature (oxidising media): 500°C.
Maximum temperature (non-oxidising): 550°C.
Maximum temperature (steam): 650°C.
Pressure range (temperature dependent): Vacuum to 40MPa/400bar.

Optional groove filler material
PTFE is available for agggresive chemical conditions, but restricted service capabilities apply. Please consult our Technical Support Team for assistance..

How supplied
Multi-flange configuration: 1/2-inch to 12-inch, Classes 150-2500.
Individual flange configuration: 1/2-inch to 24-inch, Classes 150-2500.
Other sizes on application.

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