在火电建设中,焊接工作是一项十分重要的施工工艺,它直接关系到工程质量、建厂速度以及投产后电厂的安全运行。近些年来随着我国能源工业的发展,为提高发电机组的热效率,降低煤耗和每个千瓦的造价,大量选用大型机组(单机10万千瓦以上机组)。大机组安装的焊接工作有一系列的特点,同5万千瓦以下机组相比主要有以下几个方面。〈1〉焊接工作量大,以国产5万千瓦机组为例,机炉安装的受监察焊口仅有5000个左 In thermal power construction, welding work is a very important construction technology, which is directly related to the quality of the project, the speed of construction and the safe operation of power plants after they are put into operation. In recent years, with the development of China’s energy industry, a large number of large-scale units (single unit with a capacity of 100,000 kilowatts or more) have been widely used in order to increase the thermal efficiency of generating units and reduce the coal consumption and the cost per kilowatt. Large units installed welding work has a series of features, with the following 50,000 kilowatts compared to the following major aspects of the following. <1> The workload of welding is large. Taking a domestic 50,000-kilowatt generating unit as an example, there are only 5000 left welded welds installed in the furnace