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How to do the inspection of glass fiber reinforced plastic cable tray?


2022-01-20


With the continuous improvement of FRP preparation technology, FRP bridges gradually replace steel bridges, which can be seen everywhere in our lives.Cable TrayWhen, should first carry out quality inspection, qualified rear can continue construction, and repair the defects. Specifically, we can check from the following aspects:

1. Appearance inspection

All parts should be visually inspected, and the following defects are not allowed: bubbles, the maximum allowable bubble diameter on the surface of the corrosion-resistant layer is 5mm, if the diameter per square meter does not exceed 5 If there are less than 3 bubbles in mm, they shall not be repaired, otherwise they shall be scratched and repaired. Cracks, the surface of the anti-corrosion layer is not allowed to have a depth greater than 0 .5mm cracks, the surface of the reinforcement layer is not allowed to have a depth greater than 2 mm cracks. Concave-convex (or wrinkled), the surface of the corrosion-resistant layer is smooth and flat, the thickness of the concave-convex part of the reinforcement layer is not more than 20% of the thickness, the anti-whitening anti-corrosion layer is not allowed, and the maximum diameter of the reinforcement layer is 50 Mm Other, FRP cable tray shall be firmly bonded between layers without delamination, delamination, fiber exposure, resin nodules, foreign matter inclusions, obvious uneven color, etc.

2. Measurement of mechanical properties and resin content of materials

In the glass fiber reinforced plastic cable tray manufacturing at the same time, according to the same raw materials and process conditions to produce a certain number of samples, or from the bridge has arrived on the sample, test the mechanical properties and resin content of the material, the test must be carried out in accordance with the relevant national standards, the data results should meet the design requirements of the product.

3. Determination of surface hardness of glass fiber reinforced plastic cable tray material

On the one hand, the surface hardness of the material indicates the degree of curing of the resin, on the other hand, it can also reflect other physical and chemical properties of the material. The hardness is measured by Barcol hardness tester.

4. FRP cable tray to measure each geometric size and wall thickness

Before or after the bridge leaves the factory, the geometric size and wall thickness of the bridge shall be measured in detail with steel measuring tools with corresponding accuracy requirements. If the bridge does not meet the requirements, it shall be degraded or scrapped. In addition, the load test and corrosion resistance immersion test of the bridge are also required, which are generally carried out by the manufacturer or jointly completed with the user. With the continuous improvement of FRP bridge processing technology and the emergence of new corrosion-resistant resins, FRP bridges will be more and more widely used in the chlor-alkali industry.


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