Second level that does not allow water leakage, structural surface can have a small amount of wet stains. Industrial and civil buildings: the total area of wet stains is not greater than 0.1% of the total waterproof area, a single wet stain area is not greater than 0.1 square meters, any 100 square meters of waterproof surface area of no more than 2.
Building waterproofing grade should be designed by the designers in the waterproofing design, according to the nature of the building, the importance of the use of functional requirements to determine the waterproofing grade of each part of the building, and then according to the waterproofing grade, the waterproof layer of the waterproofing layer of the durable life to the selection of waterproofing materials and structural design.
The waterproof grade of electronic measuring instruments reflects the ability of the instrument to prevent moisture and dust, especially for outdoor activities, inevitably in high humidity or dusty and sandy harsh environment, the instrument's sealing and waterproof ability to ensure the safe operation of the instrument and the life of the instrument is critical. For this reason, the IEC529 standard was established internationally. In order to adapt to this, the Japanese industrial standard will be the waterproof protection of electronic equipment is divided into 10 levels, respectively, to IPX1, IPX2 ...... said.
Expanded Information
Waterproof construction attention
1, should be the first grass-roots level treatment. Remove the original decorative materials, the floating soil, cement clean up, require the surface is flat, dry.
2, painting waterproof coating. Waterproofing treatment in the grass-roots level on the brush once, to be dry (about 2-4 hours) and then repeat the brush once, waterproofing treatment is considered done. Waterproof coating should be painted evenly, there can be no leakage, bulging and peeling phenomenon, otherwise it will affect the waterproof effect.
3, do closed water test, closed water test is to test the quality of indoor waterproofing important means of inspection. After the waterproofing project, seal the door and the water outlet, in the indoor water to reach a certain height of the liquid level, 24 hours if there is no significant drop in the liquid level, that is qualified.
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