Painting Thickness Meter | How are fire-resistant coatings classified?

Fire-resistant coatings for steel structures play a very important role in the construction of steel structures, because steel structural do not have fire resistance performance. China's current standards and regulations have made clear provisions for the classification and quality of steel structures and fire-resistant coatings. Thin and insurance and thick fire-resistant coating products are classified and inspected.       Steel structure fireproof coatings can be classified according to thickness. They can be divided into ultra-thin steel structure fireproof coatings. The coating thickness is less than or equal to 3 mm. The other is a thin steel structure fireproof coating with a thickness greater than three millimeters，but less than 7 millimeters．Then a relatively thick rear-layer steel structure fireproof coating, its coating thickness is greater than 7 millimeters, less than or equal to 45 millimeters.

1. Why paint quality is different?

There are many factors that affect the quality difference of steel structure fireproof coatings. For different coatings manufacturers, the raw materials, production processes and formulations of the products have a certain impact on the quality of the products. In addition, even for the same manufacturer, there are also slight quality differences between batches of products.

2. Fire coating thickness detection with painting thickness meter

Fire-resistant coatings are mainly divided into ultra-thin, thin and thick. The thin coating thickness is generally within 3mm and the decorative effect is also good. The reason why this material is fireproof is that it can expand and foam at high temperatures. The coating can increase the fire resistance limit to 2 hours. The fire-resistant coating thickness for thick steel structures is required to be greater than 7mm and less than 45mm. The granular side of this material has a small density, low thermal conductivity and a fire resistance of more than 2 hours.
       The fire resistance time of the fireproof coating and the fireproof coating thickness are proportional in a certain stage. The fireproof time of the same fireproof coating is different due to the different thicknesses. But beyond a certain limit, coating thickness and fire resistance time will be unbalanced. Therefore, it is very important to measure the fire-resistant coating thickness with a fire-resistant painting thickness meter.

Usually we use the Linshang LS223 fire-resistant painting thickness meter to check the fire-resistant coating thickness. This painting thickness meter is equipped with two probes F3N3 and F5N3. Users can choose the painting thickness meter that suits them according to the coating thickness they measure. The painting thickness meter uses the nondestructive measurement principle of the Hall effect and eddy current effect, which will not cause damage to the coating surface.
       When spraying steel structure fire-resistant coatings, we must select the corresponding soil layer thickness and construction technology according to the fire resistance limit of the component to achieve the fire-proof effect. Choose an appropriate painting thickness meter is also very important.