一、前言炉胆烟管锅炉的平封头(以下称管板),在从炉胆中心向管束区和炉胆顶上部辐射的轴线上,由内压等产生的应力、应变,加上热影响等,使管端产生渗漏、裂纹,或者炉胆和平封头的连接部位损坏。为了解这些现象,研究对策,进行了实验。二、供试验的锅炉型式用于实验的锅炉,其型式如图1所示。 I. INTRODUCTION The head (hereinafter referred to as the tube plate) of the hearth tube of the furnace tube has stress and strain caused by internal pressure and the like on the axis of radiation from the center of the tube to the tube bundle area and the top of the furnace tube, Impact, etc., so that leakage occurred at the pipe end, cracks, or head of the furnace gall bladder junction damage. To understand these phenomena, research strategies, conducted experiments. Second, the type of boiler used for the experiment Experimental boiler, the type shown in Figure 1.