Sealing
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sealing is the result of the prohibition of a passage.
This general term can be included/understood in many fields.
Synopsis |
Physical sealing
The physical sealing relates to the prohibition of passage of one , of one or of one .
For the fluids and gas, the installation of one joint is necessary, in the majority of the cases.
Technique of protection of the bad weather in the building and public works, having given its name to a profession: .
Index of protection (IP)
At the technical level of Indices of protection with the solid bodies and liquids (IP) exist to define the quality of the sealing.
This index is written: IP XY
Where X and Y are figures which mean:
X corresponds to against the bodies and can take the following values:
- 0. No protection.
- 1. Protected against the solid bodies higher than 50 mm (ex: contact of the hand).
- 2. Protected against the solid bodies higher than 12 mm (ex: finger of the hand).
- 3. Protected against the solid bodies higher than 2,5 mm (ex: tools, wire).
- 4. Protected against the solid bodies higher than 1 mm (ex: fine tools, nails).
- 5. Protected against dust.
- 6. Completely protected against dust.
Y corresponds to protection against the liquids and can take the following values:
- 0 protection No.
- 1 Protected against the vertical falls from water drops.
- 2 Protected against the falls from water drops until 15° of the vertical.
- 3 Protected against rainwater until 60° from the vertical.
- 4 Protected against projections from water of all directions.
- 5 Protected against the jets from water of all directions to the lance.
- 6 Protected against the big waves.
- 7 Protected against the effects ofimmersion .
- 8 Material submarine under specified conditions (prolonged immersion).
For example the notation: IP 67, corresponds to a product completely tight with dust and protected against the big waves.
This coefficient is defined in DIN40050, IEC 529, BS 5490
Sealing in
In clock industry, sealing of one is defined by its resistance to .
In clock industry, the manufacturers generally indicate the degree of sealing in meters (m), feet (ft), or atmospheres (atm). Watches carrying designation "tight", with or without indication of overpressure, must be in conformity and have undergone successfully the tests envisaged with ISO-2281. These is intended for a current daily use and must resist water earthy of the exercises such as the stroke of short duration. They can be employed under conditions of variations of or of and of .
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 system of control of time and to answer all the criteria envisaged by ISO 6425: luminosity, impact resistance, resistance to magnetic fields, solidity of .
Sealing in communication
One speaks about sealing in the field of the communication and information when means about against the diffusion is set up.
Agreements of confidentiality 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 one . 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 .
