低压水管锅炉和火管锅炉,为了便于修理,避免有害的焊接应力和变形,锅筒和水管或烟管的连接方法大部分是胀接.胀接质量对锅炉的安全运行和使用寿命是十分重要的.(一)对胀接质量的要求因为锅炉是在受热受压的状态下运行的,所以锅炉管子的胀口(见图1)要有一定的强度和紧密度. Low-pressure water tube boiler and fire tube boiler, in order to facilitate the repair, to avoid harmful welding stress and deformation, the connection between the drum and the water pipe or pipe most of the expansion. Expansion of the quality of the boiler safe operation and service life is very important (A) the quality of the expansion requirements Because the boiler is under heat and pressure operation, so the expansion of the boiler tube mouth (see Figure 1) to have a certain intensity and tightness.