The load deviation in constant-forced hanging bracket directly affect thermal displacement of the piping system and the performance of said hanging bracket.For this

taking the main steam pipeline of a 220 MW unit in one power plant as example

the relationship between the load deviation in constant-forced hanging bracket and the thermal displacement of piping system has been calculated and analysed.Results show that the vertical thermal displacement is increasing in the event of increasing the load deviation

while the horizontal displacement having remarkable change.In order to control the stress level in the pipeline

it is recommended to select the suitable constant-forced hanging bracket during the time of design.The constant-forced hanging brackets have already been long-term in operation or those of poor quality should be timely adjusted or replaced;the pipeline of ultrasupercritical units should use constant-forced hanging bracket with high quality and little load deviation

to ensure long-term safe and reliable operation of the pipeline and the hanging bracket.