Method one, observe the thickness of the substrate and the thickness of the coating.
The ppgi corrugated roofing sheets is composed of a substrate and a color coating or plating layer. We must first consider the thickness of the substrate and the coating layer. A better color steel plate substrate is 0.02-0.05mm, and the thickness of the coating or coating is often only 0.15mm or less. Because the thickness of the substrate is very important from the perspective of affecting the use time of the color steel plate. Some manufacturers make changes to the substrate and color steel plate coating or film. They reduce the thickness of the substrate, but increase the thickness of the peritoneum to reduce the production cost of the color steel plate, which greatly reduces the service life of the color steel plate.
Method two, observe the leakage edge of the ppgi corrugated roofing sheets.
Observing the leakage edge of the color steel plate is also a relatively simple method. When we get a color steel plate, we can first observe whether the exposed steel of the ppgi corrugated roofing sheets is finely crystallized, whether it is gray, dark, and impurities. If the cut surface is of fine crystallinity, the quality is superior.
Method three, listen to the sound.
The so-called sound listening method is also relatively simple, that is, tap the color steel plate with your fingers or with a hard object. If the color steel plate is of poor material, the sound will be dull and the metal sound is not obvious; the color steel plate metal with better material The sound is relatively loud and crisp. This method is very easy to use for people who have a little knowledge of color steel plates, it is intuitive and easy to operate, and does not require any auxiliary tools.
Method four, check the quality certificate of the ppgi corrugated roofing sheets.
After you have taken a fancy to a certain color steel plate, you must check whether the color steel plate has the inspection standard of the relevant department. If possible, try to visit the color steel plate manufacturer to see how the company's environment is and whether it is formal. In addition, you can also inquire about the reputation of this company from the market. Generally, the evaluation in the market will be more objective and fair.
Method five, look at the price.
As the saying goes, what you pay for is what you pay for. Good products are not cheap and cheap are not good ones. Therefore, when choosing color steel plates, you can also start from the price. If the price of the same ppgi corrugated roofing sheets differs greatly from different manufacturers, this must arouse our attention.
