Liquid level measurement of liquid chlorine storage tanks is a key link in the chemical industry. Due to the special properties of liquid chlorine, strict requirements are placed on the safety and corrosion resistance of the measuring equipment.
Lined F46 magnetic flap level gauge has become an ideal choice for liquid level measurement of liquid chlorine storage tanks due to its superior corrosion resistance and stable measurement capabilities.
This article will discuss in detail the characteristics of the lined F46 magnetic flap level gauge and its application in liquid chlorine storage tanks.
About F46-Lined Magnetic Level Indicators and F46 Characteristics
Lined F46 magnetic flap level gauge is a corrosion-resistant level measuring instrument, which is widely used in the level measurement of storage tanks, underground storage tanks, etc. Its lining material is a fluorine material with the chemical code F46.
The full name of F46 is fluoroethylene propylene, also commonly known as FEP. It is a modified variety of polytetrafluoroethylene (PTFE or F4). Its corrosion resistance is equivalent to that of PTFE and it can resist almost all strong acids, strong alkalis and strong oxidants. It is a plastic material with excellent corrosion resistance and is suitable for measuring the level of highly corrosive liquids in the chemical industry. It also has good temperature resistance and can maintain stable performance in the high and low temperature range of -40℃ to 200℃. At the same time, F46 material also has high mechanical strength and can withstand higher pressures of no more than 1.6MPa.
However, F46 has better processability than F4. Its melt viscosity at 380°C is lower than that of polytetrafluoroethylene, at 103-104 Pa.S. It has good processability of thermoplastics. Its pipes are made of FEP pellets through melting, extrusion and cooling, which is fundamentally different from PTFE powder cold pressing, and overcomes the defect of polytetrafluoroethylene pipes that are prone to leakage due to the production molding process.
Liner Material Comparison: Applications of F4 and F46 in Magnetic Level Indicators
Another common lining F4 anti-corrosion magnetic flap level gauge has its lining material made of polytetrafluoroethylene fluoroplastic, which is one of the best corrosion-resistant materials in the world today. However, due to its high melt viscosity and lack of fluidity, polytetrafluoroethylene cannot be molded using the production process of thermoplastic plastics. Generally, powdered PTFE resin is cold-pressed to form a dense tube shape, which is then sintered and cooled to make a tube product of a certain length.
Because it is cold-pressed, it is easy to form tiny gap defects between molecules inside the product. Some highly permeable media such as liquid chlorine can easily penetrate into the outer wall of the pipe under high pressure.
It can be seen that the magnetic flap level gauge with lining F46 material has better anti-permeability performance than that with lining F4 material.
Liquid Chlorine Storage Tank Level Monitoring: Material Selection and Safety Requirements
Liquid chlorine is an important chemical raw material, widely used in water treatment, bleaching, sterilization, chlor-alkali industry and other fields. Liquid chlorine is highly corrosive to most metal materials, especially in humid conditions, it will produce hydrochloric acid and hypochlorous acid, which are highly corrosive.
At normal temperature and pressure, liquid chlorine is very volatile, has a strong pungent odor, and has a strong irritating effect on the respiratory tract and skin. Long-term contact may cause poisoning.
In addition, liquid chlorine has a very strong permeability and can penetrate the F4 pipe produced by the PTFE powder cold pressing process, causing leakage. Therefore, you need to be particularly careful when selecting the material type for the liquid chlorine storage tank level monitoring instrument. Do not use F4 polytetrafluoroethylene plastic pipe as the lining material, but use a magnetic flap level gauge lined with F46 fluoroplastic material to avoid liquid chlorine leakage accidents.
Therefore, in order to ensure the safety of the operation of liquid chlorine storage tanks, effectively and timely monitor the changes in the liquid level of liquid chlorine storage tanks, and ensure safe production, the selection of lining anti-corrosion magnetic flap level gauges must meet the following requirements:
First, liquid chlorine is a highly toxic substance and has strong corrosiveness to metal materials. The main material of the level gauge should be able to withstand the corrosion of liquid chlorine for a long time. It is necessary to select materials with strong corrosion resistance as the lining body, such as fluoroplastic materials;
Second, liquid chlorine is usually stored in a special liquid chlorine tank at a low temperature of -20℃ or a high pressure of 1.2MPa. The level gauge must have a certain structural strength to meet the requirements of low temperature and high pressure working conditions;
Third, the selected lining material can prevent the leakage of liquid chlorine. The third requirement is often easily ignored by the manufacturers of magnetic flap level gauges, resulting in liquid chlorine leakage and production safety accidents.
Innovation: Flap-11Pb Lined FEP Magnetic Level Indicator Solution
Zero Instrument Automation is a high-tech company specializing in the production of liquid level and material level control instruments. The products it provides also cover various types of magnetic flap level gauges. In response to the need to measure the level of liquid chlorine, bromine water and other media with strong molecular permeability, Zero Instrument has successfully developed a Flap-11Pb lined FEP magnetic flap level gauge, which can be used for long-term monitoring of the liquid level of liquid chlorine tanks without leakage.
The Flap-11Pb lined FEP magnetic flap level gauge can work reliably for a long time in the pressure range of 0 to 1.6MPa and the temperature range of -40℃ to 120℃, eliminating the leakage of the medium, ensuring safe production, and has been highly recognized by customers.
Conclusion
Lined F46 magnetic flap level gauge has shown significant advantages in liquid chlorine tank level measurement with its excellent corrosion resistance, good safety and precise measurement capabilities.
Its design and application not only improve the reliability and accuracy of measurement, but also provide a solid guarantee for safe production in the chemical industry.
By selecting suitable lining materials and reasonable installation and maintenance, magnetic flap level gauges can play an important role in the measurement of special media such as liquid chlorine.