Sealing technologies for tube sheet and shell connections

Welded Seal: The tube sheet and shell are directly welded together, resulting in a compact and reliable seal that can withstand high pressure and high temperature. However, it is not repairable after welding and is prone to stress concentration, affecting equipment lifespan. Suitable for long-term stable operation scenarios, such as chemical reactors.

Mechanical Seal: Sealing is achieved through mechanical devices, offering excellent performance and ease of maintenance. However, the structure is complex, the cost is high, and it requires strict installation precision. Commonly used in equipment requiring frequent maintenance, such as heat exchangers in food processing.

Embedded Seal: Utilizes a flange and socket design, offering convenient installation and reduced costs. Stress concentration is reduced through fixed flange positioning. Suitable for rapid assembly scenarios, such as heat exchangers in new energy equipment.