用内孔焊结构代替传统的端面焊结构是提高换热器管子与管板焊接接头抗应力腐蚀和缝隙腐蚀稳定性的根本途径。
Substituting inner-hole welding construction for traditional end surface welding construction is a fundamental method for raising the stabilities of anti-stress corrosion and anti-slit corrosion.
压盖式伸缩接头：该产品适用于两边与管子插接、勿需焊接，结构合理，密封，安装快速方便。
Covering Sleeve: The way of using this product is to joint with the tube on both sides , no welding. It has a reasonable structure, and is sealed. it is very easy to install.
将焊有球头的管子与外螺纹接头中心相对，旋转螺母使其自动对中心后，敲击螺母使螺母旋紧。
Make the pipes with button head align with the joints of external thread, rotate the nut and make it align to the center, knock the nut and screw up the nut.
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