Characteristics of flow measurement in the petroleum and chemical industry

Characteristics of flow measurement in the petroleum and chemical industry Due to the diversity of the measured media, the measurement range of petrochemical and chemical industry flow measurement objects is extremely wide, ranging from the measurement of small flow rates used in additives and small test devices to the measurement of feed gas flow rates. Large flow, fluids ranging from the most common water vapor, air, gas, etc., to various chemical products and semi-finished products, as well as objects that are difficult to measure such as residual oil, liquid ammonia, and liquid hydrocarbons. The petrochemical industry has strong financial strength and is an important market for high-end products with high quality and high price. In addition to some of the basic features described above, there are the following two distinctive features. ①Most petrochemical and chemical companies have explosion-proof requirements. Even if the measured fluid itself is not an inflammable and explosive substance, the entire area is an inflammable and explosive place. Therefore, the instrument selection should comply with the explosion-proof regulations. ②It is corrosive. There are many measured fluids that are corrosive, and the corrosion resistance of the parts in contact with corrosive media must be considered when selecting the instrument type. In addition to the corrosion of the measured medium, there is also atmospheric corrosion. For example, rainwater in the chlor-alkali plant, nitrogen fertilizer plant, and sulfuric acid plant has a certain corrosive effect on the exposed parts of the instrument. This requires the protection of outdoor instruments to avoid premature damage.