In the chemical, oil and gas industries, tank blanketing is an important safety measure. It replaces the air inside the tank with nitrogen to prevent flammable, explosive substances from coming into contact with the air, thereby reducing the risk of ** and fire. This article will detail the ** tank blanketing technology, focusing on the quality requirements such as nitrogen purity, pressure, flow rate, as well as operation procedures and related data, to provide a comprehensive and practical guide for professionals in related fields.
The blanketing of storage tanks has very strict requirements for the quality of nitrogen. First and foremost, the purity of nitrogen is crucial. Typically, nitrogen purity needs to be 99More than 5% to ensure effective isolation of air and tank contents. Nitrogen gas with insufficient purity may not be able to completely block oxygen, increasing the safety risk. Secondly, the pressure of nitrogen also needs to be precisely controlled. Too high a pressure can cause damage to the tank, while too low a pressure will not form an effective blanketing layer. In general, the pressure of nitrogen should be slightly higher than the pressure of the gas inside the tank. In addition, the flow rate and temperature of nitrogen should also be adjusted according to the size of the tank and the nature of the stored substance.
The operation steps of the storage tank blanketing include the following links: first, the preparation of nitrogen to ensure that the nitrogen source is stable and the nitrogen quality meets the requirements. A safety check prior to nitrogen injection is then performed, including checking the tightness of the tank and piping connections. This is followed by the injection of nitrogen, which is usually increased gradually, with a slow increase in nitrogen pressure and then a steady hold. Throughout the process, nitrogen pressure, flow, and purity need to be continuously monitored to ensure that safety standards are met. Finally, after the blanketing is completed, the tightness test is carried out to ensure that there is no leakage in the storage tank.
According to international safety standards and industry norms, tank blanketing should follow a series of strict standards. For example, the API 2000 standard specifies the calculation of respiration loss in storage tanks, which can be used to guide the setting of nitrogen flow rates. In practice, according to a study on oil storage tanks, 99Sealing with 5% pure nitrogen reduces the oxygen concentration in the tank from 21% to less than 1%, significantly reducing the risk. In addition, the quality retention rate and safety performance of the contents of the nitrogen-sealed tank are significantly improved.
Tank blanketing is a critical safety measure and requires extremely high quality of nitrogen. By precisely controlling the purity, pressure and flow rate of nitrogen, fires and accidents can be effectively prevented. With the continuous advancement of technology, the safety and efficiency of tank blanketing will be further improved, providing more reliable safety assurance for the chemical, oil and gas industries.