The sealing is the result of the prohibition of a passage. This general term can be included/understood in many fields.

Physical sealing

The physical sealing relates to the prohibition of passage of a solid , a Fluide or a Gaz.
For the fluids and gas, the installation of a joint is necessary, in the majority of the cas.
Technique of protection of the bad weather in the building and public works, having given its name to a profession: the etanchor s.

Index of protection (IP)

On the technical level of the Indices of protection to the solid and liquid bodies (IP) exist to define the quality of the étanchéité.
This index is written: IP XY
Where X and Y are figures which mean:

For example the notation: IP 67 , corresponds to a product completely tight with dust and protected against the effects of the immersion.
This coefficient is defined in the standards DIN40050, IEC 529, BS 5490

Sealing in Clock industry

In clock industry, the sealing of a watch is defined by its resistance to the Pression. The manufacturers generally indicate the degree of sealing in meters (m), feet (ft), or atmospheres (atm). The watches carrying “tight” designation, with or without indication of overpressure, must be in conformity and have undergone successfully the tests envisaged with the Norme ISO-2281. These watches is intended for a current daily use and must resist the water lasting of the exercises such as the stroke of short duration. They can be employed under conditions of variations of air pressures or Eau and Température.

The watches known as of diving are wrist watches having to resist a diving in water with a depth of at least 100 meters (330 ft), to have a control system of time and to answer all the criteria envisaged by the Norme ISO 6425: luminosity, impact resistance, resistance to the magnetic fields, solidity of the Bracelet.

Sealing in communication

One speaks about sealing in the field of the communication and information when means of Protection against the diffusion are put in place.
Agreements of Confidentialité are often set up to guarantee the sealing of the information of the interior towards the outside of the companies.

Sealing of a field

It is said that a field is tight when this field is not easily accessible by a Néophyte. In the same way, one will speak about the sealing of a matter when this one is not accessible for the neophyte. Or when this propros is hermetic, obscure, in short Amphigouri that.

See too

• Impermeability
• Mechanical seal

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