管壳式换热器管子-管板接头连接型式改进及其质量控制

Improvement of Tubular Heat Exchangers' Tubes-Tubesheet Joints Connecting Patterns and Its Quality Control

管壳式换热器管子-管板接头连接一般采用胀接或焊接型式,在使用过程中容易产生泄漏、腐蚀和破损导致设备失效。如果将接头连接型式加以改进,改为焊胀结合的型式,并在制造过程中严格质量控制,接头的抗应力腐蚀、抗缝隙腐蚀和抗疲劳的能力将提高三倍以上。

The connection of the tubular heat exchangers＇ Tubes-Tubesheet joints is usually adopted in the form of welding or expansion. In the course of use, it is easy to leak, corrode and rupture, which will lead to the loss of the equipment effectiveness. If the joints connecting patterns will be improved into expansion and welding combining patterns, and strictly control its quality in the manufacturing process, the power of the joints resistance stress corrosion,resistance crevice corrosion and anti - fatigue will be able to be raised for more than three times.