各种锅炉、废热炉、余热回收利用装置以及蒸汽连通管道等构件,为了防止热能的损耗,提高热效率,一般都外裹石棉或耐火泥等保温层。若在需要包裹保温层处先焊上销钉,则可增强保温层的牢度,延长使用寿命。一般销钉焊接的数量很多,少则几千个,多则几万 Various boilers, waste heat furnaces, waste heat recovery and utilization units, and steam communication pipes and other components, in order to prevent heat loss, improve thermal efficiency, are generally covered with asbestos or fire-resistant insulation such as mud. If you need to wrap the first parcel insulation at the pin, you can enhance the fastness of the insulation to extend the service life. The general number of pin welding a lot, ranging from a few thousand, as many as tens of thousands