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在锅炉压力容器的定期检验中,各种型式的不可见部位总是经常遇到,如立式锅炉的下脚圈、炉胆、横水管、冲天管;水火管锅炉的下降管口、管束水侧四周;水管锅炉的上下联箱及与其连接的水冷壁管口……等等。这些部位不论从外部,还是从炉膛筒体的内部检查时,都是检验员在直观视力范围内所不能看到的,然而这些部位的现状如何,直接关系到锅炉的安全运行。这些现状包括:结垢程度、有无变形、腐蚀情况、焊缝布置、几何形状等。
In the regular inspection of the boiler pressure vessel, various types of invisible parts are always encountered, such as the lower leg of a vertical boiler, a furnace tube, a horizontal water pipe, and an overhead pipe; a drop pipe of a water pipe fire boiler, Around; the upper and lower header of the water tube boiler and the water wall nozzle connected to it ... and so on. These parts are inspected by the inspectors in the visual acuity range both from the outside and from the inside of the furnace tube. However, the current status of these parts is directly related to the safe operation of the boiler. These include: the degree of scaling, with or without deformation, corrosion conditions, weld layout, geometry and so on.