Shandong ventilation pipeline plays a very important role in our life. Because most of the ventilation pipelines are thin-walled products, warping and deformation will occur in the process of production and use. So what are the reasons for the deformation of ventilation ducts? Shandong ventilation duct manufacturers will introduce to you:
1. The volume of magnesia cement is a continuous expansion process under natural curing conditions. Its linear expansion rate is 0.1-0.2%, and its volume expansion rate is about 1%.
2. Magnesite inevitably produces local overburning in the course of serving and burning, which makes part of MgO in a dead state. The hydration process of overburned MgO is very slow. When MgO in the cement stone with formed strength is hydrated by water again, Mg(OH)2 is formed and its volume expands by 120%.
3。 Volume expansion of free CaO in light-burned magnesia is 90% when hydration occurs, while SO42-exists in brine tablets。 When Ca(OH)2 is converted into gypsum, solid volume will increase by more than two times, resulting in product deformation, which is also the reason for limiting free CaO content in light-burned magnesia and SO42-content in brine tablets。
4. The hydration process of MgO-Mg-C12-H2O system is a strong exothermic reaction process, and the volume of the pipeline is large. If the ambient temperature is high, the reaction heating process will occur. The temperature of the sheet body is too high and the reaction is not enough, resulting in larger crystallization stress and thermal expansion stress, which will cause the volume expansion of the product.
These are the four reasons for the deformation of ventilation pipes。 Understanding these causes can help us solve the problem better。 As long as the problem is solved in time, it will not affect the normal work。 However, no matter when, we must strictly follow the operation specifications, so as to ensure the effective use of ventilation pipes。 Above is the whole content of Shandong Ventilation Pipeline Manufacturer for you, I hope to help you all!