石油化工装置的设备和管道法兰密封问题不仅涉及到节能和环保问题,更重要的是关系到设备的长期安全运转。随着炼油化工工艺技术的进步,要求生产运转周期越来越长,工艺操作条件越来越苛刻,这使得设备的密封性日益得到企业的重视。密封分为静密封和动密封,静密封包括法兰密封、螺纹密封和承插密封等,这些密封装置兼有连接功能,因此又分别称为静连接、法兰连接、螺纹连接和承插连接。它们都属于可拆卸连接,其中法兰连接密封装置最为常用。 Petrochemical plant equipment and pipe flange sealing problems not only relates to energy saving and environmental issues, more importantly, relates to the long-term safe operation of equipment. With the progress of refining and chemical process technology, the requirements of production and operation cycle longer and longer, more and more harsh operating conditions, which makes the sealing of the equipment increasingly get the attention of enterprises. Sealing is divided into static seal and dynamic seal, static seal, including flange seal, thread seal and bearing seal, etc., these seals both connecting function, so they are also called static connection, flange connection, screw connection and socket connection . They are all detachable connections, of which the flange connection seal is the most commonly used.