To understand the relationship between burst pressure and temperature, it is necessary to clarify the influence of temperature on the mechanical properties of rupture disc material. The burst pressure of rupture disc depends on the breaking strength of the material. When the stress on the material reaches the breaking strength, the rupture disc will break in a preset manner. The change in temperature will directly change the important mechanical parameters such as the breaking strength and elastic modulus of the material. For metal materials, in a low temperature environment, the lattice structure of the material will become tighter, the brittleness will increase, the toughness will decrease, and the breaking strength will increase. This means that the burst pressure originally set at room temperature may require higher actual pressure at low temperatures to break the rupture disc. Conversely, in a high temperature environment, the metal material will undergo thermal softening, the binding force between the lattices will be weakened, and the breaking strength will be significantly reduced. At this time, even if the system pressure does not reach the preset blasting value at room temperature, the rupture disc may break early due to material softening. Non-metallic materials are more sensitive to temperature. polytetrafluoroethylene will begin to soften and deform above 260℃, and the breaking strength will drop sharply. If the temperature of the application scenario is close to or exceeds its upper limit of temperature resistance, the actual burst pressure of rupture disc may only be 50% of the preset value. Graphite material is easy to crack at low temperatures. Although it is relatively stable at high temperatures, it will also have loose structure when it exceeds 800℃, resulting in increased burst pressure deviation.
In practical applications, buyers need to determine the preset pressure of rupture disc based on the operating temperature range of the equipment rather than the room temperature environment, while considering the dynamic influence of temperature fluctuations on the burst pressure. The most important thing is to clarify the normal operating temperature, maximum operating temperature and minimum operating temperature of the equipment, and calibrate the preset pressure of the rupture disc based on the most unfavorable temperature conditions. If the equipment has low temperature operating conditions, the preset value needs to be adjusted according to the increase in burst pressure at low temperature. If there are high temperature operating conditions, the preset value needs to be adjusted according to the burst pressure reduction at high temperature. At the same time, the frequency and amplitude of temperature fluctuations need to be considered. If the temperature of the equipment fluctuates frequently within a large range, it will accelerate the fatigue aging of the rupture disc material, resulting in a decrease in the stability of the burst pressure. At this time, it is necessary to choose materials with better fatigue resistance and shorten the replacement cycle. In addition, for equipment with temperature gradients, it is necessary to install the rupture disc in the area with the highest temperature to avoid the failure of the rupture disc performance due to local over-temperature.
As a professional manufacturer and supplier, our rupture disc fully considers the correlation characteristics of burst pressure and temperature in the design and production process, and can provide B-side buyers with precisely adapted solutions. At the same time, we have a professional laboratory, which can accurately calculate the burst pressure deviation at different temperatures through simulation tests based on the temperature parameters of the equipment provided by customers, and provide customers with customized preset pressure schemes to avoid selection errors caused by temperature factors.
