Pipe-blowing is an important part of debugging process for newly built power unit. However

there wa a lack of detailed description and analysis for pipe-blowing technology for large-capacity eight-square dua tangential boilers. Against this

combined with the debugging process

full description and deep analysis for th one-stage superheater and reheater with the combination of stable-pressure and reduced-pressure pipe-blowing technology from the 1 000 MW unit dual tangential boiler were carried out in this paper

especially for the influenc of main control parameters adjustment in each stage on medium temperature and tube wall temperature. The pipe blowing process shows that

the process design of this 1 000 MW unit dual tangential boiler is reasonable

th control of each parameter is excellent

the target plate is qualified

and the pipe-blowing standard is met. Throug detailed record and in-depth analysis of the main parameters of the whole process of pipe-blowing

the key operatio points of the pressure-reducing blowpipe and pressure-stabilizing pipe are highlighted. The result can provide bette reference significance for pipe-blowing technology of the similar boilers.