By cause analyses of boiler tube failures in some powerplant, combined with technical reform, measures on operation and maintenance to reduce boiler tube failures are analyzed and discussed.

• 通过对某发电老厂各种形式的"四管"泄漏产生的原因进行详细的分析,结合技术改造,从检修和运行两方面采取措施来减少锅炉"四管"泄漏。