Home Company Products Contacts Site map


Klinger® Gaskets > Gasket materials / PTFE Products > KLINGERSIL range > KLINGERSIL C-4400 - Flanged joint integrity

  Gasket materials / PTFE Products
Flanged joint integrity
High temperature tightness
High temperature tightness is measured by means of the Klinger Hot Compression test under defined
constant gasket load and temperature with increasing internal pressures using nitrogen as test fluid.
Stabilisation time for each reading is two hours and a new test specimen is used for every gasket
load and temperature.
The tightness is analysed with a massflow meter. The pressure is controlled by pressure controller.
Important points to be observed
Gasket load 15 MPa

With heightened awareness of safety
and environmental issues, reducing
leaks from flanged assemblies has
become a major priority for industry.
It is therefore important for companies
who use gaskets to choose the
correct material for the job and install
and maintain it correctly to ensure
optimum performance.

A flanged joint will remain tight
as long as the surface pressure in
service is higher than the minimum
surface pressure required to achieve
the necessary levels of tightness
but is lower than the maximum
permissible surface pressure.But
increasingly high demands on the
tightness requirements for flanged
joints (e.g. Tightness class L 0.1 in
accordance with DIN 28090)
necessitate the application of high
loads on the gasket material in order
to meet these stringent requirements.

If the gasket is to be subjected
to non-static loading and stress
fluctuations due to temperature
and pressure cycling, it is advisable
to select a gasket material which is
less prone to embrittlement with
increasing temperatures (e.g.
KLINGERgraphite laminate,
KLINGERtop-chem or KLINGERtopsil).
In cyclic loading conditions we
recommend a minimum surface
stress of 30 MPa and that the gasket
should be as thin as is practicable.
For safety reasons never re-use

Gasket load 25 MPa
Gasket load 35 MPa