波纹管补偿器波纹管剩余寿命试验评估OA

Taking the bellows expansion joints of the heating pipe network in a city in North China as the evaluation object,the heating medium was analyzed,the fatigue test of bellows was carried out,the remain-ing life was evaluated,and some suggestions for im-proving fatigue performance were put forward.Exces-sive mass concentration of chloride ions is one of the causes of leakage in bellows expansion joints.The re-sidual life of bellows is not ideal,mainly because of the stress concentration area of bellows.Ensuring that the quality of the heating medium meets the standard and preventing corrosion caused by excessively high mass concentration of chloride ions can extend the service life of the bellows.The stress concentration of bellows should be reduced by optimizing the structural design.Strictly controlling the manufacturing process to elimi-nate defects is also an effective means to improve fa-tigue performance.