As the ventilation pipes are mostly thick wall products, they will swell and shorten in the process of manufacturing and application. What's the reason?
There are four key reasons for ventilation duct deformation:
1. Under the natural maintenance specification, the volume of magnesium concrete is a continuous expansion process, with the linear expansion rate of 0.1-0.2% and the volume moisture content of about 1%.
2. Magnetite is difficult to avoid during incineration, and the hydration process of coarse MgO installed in 3C certified fire damper is slow. When MgO in fly ash cement with compressive strength is hydrated again, it is converted to Mg (OH) 2 and added by 120% by volume.
3. After hydration, the volume of dispersed Cao in lightly burned magnesia was added by 90%, while SO42 - was present in halogen tablets. When Ca (OH) 2 is converted into aged gypsum, the solid volume will be more than doubled, resulting in product deformation, which is also the reason for restricting the content of dispersed Cao in light burned magnesia and SO42 - in halogen tablets.
4. The hydration process of mgo-mg-c12-h2o system software is an obvious chemical reaction process, and the volume of the manufactured pipeline is large. If the working temperature is high, it reflects the heating process. The plate itself is too high, the reflection is not enough, the formation of crystal in-situ stress and thermal deformation in-situ stress is large, and the volume of the product is expanded
The above is a detailed introduction about Jinan ventilation duct. I hope it will help you If you have any questions, please contact us We will provide you with professional service http://www.jntfgd.com