一. Uses of flanges：
1）Pipeline connection: Flanges are used to connect pipelines to form a continuous pipeline system for easy installation and removal. Commonly used in pipeline systems for transporting liquids, gases or solid particles.
2）Equipment connection: Flanges are used to connect pipelines and equipment, such as pumps, valves, heat exchangers, tanks, etc., to facilitate the installation and maintenance of equipment.
3）Sealing connection: Flanges are used in conjunction with gaskets to provide reliable sealing and prevent leakage.
4）Regulating and controlling flow: Valves connected by flanges can regulate and control the flow and pressure of fluids.
二. Flange maintenance：
Regular inspection: Regularly check the flange and its connectors, especially in high pressure and high temperature environments, to ensure that they are not loose, corroded or damaged.
Regularly replace gaskets: Flange gaskets may age or be damaged after a period of use. Gaskets should be checked and replaced regularly to ensure the sealing effect.
Prevent over-tightening: During installation and maintenance, avoid over-tightening the flange bolts to prevent flange deformation or damage.
Anti-corrosion treatment: For flanges exposed to corrosive environments, anti-corrosion treatment can be performed, such as spraying anti-corrosion coatings, using anti-corrosion gaskets or using stainless steel flanges.
Lubrication maintenance: For some flange connections that need to be disassembled and adjusted frequently, an appropriate amount of lubricant can be applied to the bolts and nuts to reduce friction and wear.
Tightening bolts: Regularly check and tighten the bolts of the flange to ensure the tightness and stability of the connection.
Cleaning and maintenance: Keep the flange and the surrounding area clean to prevent the accumulation of impurities such as dust and oil, which will affect the normal use of the flange.
Temperature control: For flanges working in high or low temperature environments, pay attention to the impact of temperature changes on flange connections and take appropriate insulation or cooling measures.
Regular inspection and maintenance can extend the service life of flanges and ensure the normal operation of pipelines and equipment.